Climate and average weather in Quán Hàu
In Quán Hàu, the summers are oppressive, hot, fairly dry, and mostly cloudy and the winters are mild and mostly cloudy.
Over the course of the year, the temperature in Quán Hàu typically varies from 20°C to 31°C, and is rarely below 17°C or above 33°C. June is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Quán Hàu for warm-weather activities is from early February to early May.
- Hottest
- Jun
- 31°
- Coldest
- Jan
- 20°
- Wettest
- Oct
- 492 mm
- Driest
- Jun
- 54 mm
- Rain / yr
- 2148 mm
- 170 wet days
- Daylight
- 11.0–13.0 h
- shortest–longest
- Elevation
- 13 m
- 17.4°N
- Clearest
- Apr
- 56% cloud
Quán Hàu is township in Quảng Bình, Vietnam.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Quán Hàu weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early February to early May.
Temperature through the year
Daily average highs and lows in Quán Hàu, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.4 months, from May 11 to September 20, with daily high temperatures above 29°C. The hottest month of the year in Quán Hàu is June, with an average high of 31°C and low of 28°C.
The cool season lasts 3.1 months, from December 7 to March 9, with daily high temperatures below 23°C. The coldest month of the year in Quán Hàu is January, with an average low of 20°C and high of 22°C.
Days typically run about 2°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 22 | 24 | 26 | 29 | 31 | 31 | 31 | 29 | 27 | 25 | 23 |
| Avg low (°C) | 20 | 20 | 22 | 24 | 27 | 28 | 28 | 28 | 27 | 25 | 23 | 21 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 22 | 20 |
| Feb | 22 | 20 |
| Mar | 24 | 22 |
| Apr | 26 | 24 |
| May | 29 | 27 |
| Jun | 31 | 28 |
| Jul | 31 | 28 |
| Aug | 31 | 28 |
| Sep | 29 | 27 |
| Oct | 27 | 25 |
| Nov | 25 | 23 |
| Dec | 23 | 21 |
How hot and cold Quán Hàu really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the hottest afternoons, once humidity is folded in, Quán Hàu feels like about 38°C (around June 15). About 152 days a year carry some heat stress, peaking in June.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 22 | 22 | 24 | 28 | 35 | 38 | 37 | 37 | 34 | 28 | 25 | 23 |
| Air high (°C) | 22 | 22 | 24 | 26 | 29 | 31 | 31 | 31 | 29 | 27 | 25 | 23 |
| Feels-like low (°C) | 20 | 20 | 22 | 24 | 27 | 28 | 28 | 28 | 27 | 25 | 23 | 21 |
| Air low (°C) | 20 | 20 | 22 | 24 | 27 | 28 | 28 | 28 | 27 | 25 | 23 | 21 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 22 | 22 | 20 | 20 |
| Feb | 22 | 22 | 20 | 20 |
| Mar | 24 | 24 | 22 | 22 |
| Apr | 28 | 26 | 24 | 24 |
| May | 35 | 29 | 27 | 27 |
| Jun | 38 | 31 | 28 | 28 |
| Jul | 37 | 31 | 28 | 28 |
| Aug | 37 | 31 | 28 | 28 |
| Sep | 34 | 29 | 27 | 27 |
| Oct | 28 | 27 | 25 | 25 |
| Nov | 25 | 25 | 23 | 23 |
| Dec | 23 | 23 | 21 | 21 |
Average hourly temperature in Quán Hàu
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on June afternoons, near 31°C, and coldest before dawn in January, near 20°C.
Quán Hàu weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 22° / 20° | 131 | 17.4 | 11.1 | 5.3 |
| Feb | 22° / 20° | 67 | 12.6 | 11.4 | 6.0 |
| Mar | 24° / 22° | 71 | 10.6 | 11.9 | 6.8 |
| Apr | 26° / 24° | 66 | 9.2 | 12.4 | 6.7 |
| May | 29° / 27° | 82 | 11.2 | 12.8 | 5.2 |
| Jun | 31° / 28° | 54 | 6 | 13 | 4.5 |
| Jul | 31° / 28° | 87 | 7.3 | 12.9 | 4.5 |
| Aug | 31° / 28° | 142 | 11.6 | 12.6 | 4.3 |
| Sep | 29° / 27° | 371 | 18.8 | 12.1 | 4.1 |
| Oct | 27° / 25° | 492 | 23.1 | 11.6 | 4.6 |
| Nov | 25° / 23° | 342 | 20.6 | 11.2 | 5.0 |
| Dec | 23° / 21° | 243 | 21.2 | 11 | 4.9 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Quán Hàu gets about 2148 mm of precipitation a year. On a typical day the chance of rain is very wet, but that rises and falls sharply with the seasons.
The wetter season lasts 5.5 months, from around Aug 26 to Feb 8, peaking in October at about 75% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 3.
October is the wettest month by volume, with 492 mm over about 23 wet days; June is the driest, with 54 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 56 | 44 | 34 | 32 | 35 | 20 | 23 | 38 | 63 | 74 | 70 | 68 |
| Rain days | 17 | 13 | 11 | 9 | 11 | 6 | 7 | 12 | 19 | 23 | 21 | 21 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 56 | 17 |
| Feb | 44 | 13 |
| Mar | 34 | 11 |
| Apr | 32 | 9 |
| May | 35 | 11 |
| Jun | 20 | 6 |
| Jul | 23 | 7 |
| Aug | 38 | 12 |
| Sep | 63 | 19 |
| Oct | 74 | 23 |
| Nov | 70 | 21 |
| Dec | 68 | 21 |
Monthly rainfall
Over a full year, Quán Hàu collects about 2148 mm of rain across 170 wet days — roughly 179 mm in an average month.
It doesn’t fall evenly. October is the wettest month with 492 mm, while June is the driest at just 54 mm. The three wettest months alone bring about 56% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 131 | 67 | 71 | 66 | 82 | 54 | 87 | 142 | 371 | 492 | 342 | 243 |
| Rain days | 17 | 13 | 11 | 9 | 11 | 6 | 7 | 12 | 19 | 23 | 21 | 21 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 131 | 17 |
| Feb | 67 | 13 |
| Mar | 71 | 11 |
| Apr | 66 | 9 |
| May | 82 | 11 |
| Jun | 54 | 6 |
| Jul | 87 | 7 |
| Aug | 142 | 12 |
| Sep | 371 | 19 |
| Oct | 492 | 23 |
| Nov | 342 | 21 |
| Dec | 243 | 21 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Quán Hàu, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around January 24 and lasts for 3.7 months, ending around May 15. The clearest month is April, when the sky is clear, mostly clear, or partly cloudy 53% of the time on average.
The cloudier part of the year begins around May 16 and lasts for 4.3 months, ending around September 22. The cloudiest month is June, when it is overcast or mostly cloudy 79% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 35 | 44 | 50 | 53 | 37 | 21 | 25 | 22 | 31 | 44 | 43 | 28 |
| Cloudier (%) | 65 | 56 | 50 | 47 | 63 | 79 | 75 | 78 | 69 | 56 | 57 | 72 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 35 | 65 |
| Feb | 44 | 56 |
| Mar | 50 | 50 |
| Apr | 53 | 47 |
| May | 37 | 63 |
| Jun | 21 | 79 |
| Jul | 25 | 75 |
| Aug | 22 | 78 |
| Sep | 31 | 69 |
| Oct | 44 | 56 |
| Nov | 43 | 57 |
| Dec | 28 | 72 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around May 31, brings about 13 hours of light; the shortest, around January 1, only 11 hours — a swing of roughly 2 hours.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.1 | 11.4 | 11.9 | 12.4 | 12.8 | 13.0 | 12.9 | 12.6 | 12.1 | 11.6 | 11.2 | 11.0 |
| Sunrise (AM) | 6:31 | 6:26 | 6:07 | 5:42 | 5:25 | 5:23 | 5:31 | 5:40 | 5:45 | 5:51 | 6:04 | 6:21 |
| Sunset (PM) | 5:35 | 5:51 | 5:59 | 6:05 | 6:14 | 6:25 | 6:27 | 6:15 | 5:51 | 5:26 | 5:14 | 5:19 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 11.1 | 6:31 | 5:35 |
| Feb | 11.4 | 6:26 | 5:51 |
| Mar | 11.9 | 6:07 | 5:59 |
| Apr | 12.4 | 5:42 | 6:05 |
| May | 12.8 | 5:25 | 6:14 |
| Jun | 13.0 | 5:23 | 6:25 |
| Jul | 12.9 | 5:31 | 6:27 |
| Aug | 12.6 | 5:40 | 6:15 |
| Sep | 12.1 | 5:45 | 5:51 |
| Oct | 11.6 | 5:51 | 5:26 |
| Nov | 11.2 | 6:04 | 5:14 |
| Dec | 11.0 | 6:21 | 5:19 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Quán Hàu averages about 7 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 3 and 11 days.
The sunnier stretch runs 3.6 months, from around Jan 26 to May 16. The sunniest month is April, with roughly 10 sunny days (mixed).
The greyest month is June, down near 4 sunny days — about 62% fewer than the April peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 6 | 7 | 9 | 10 | 7 | 4 | 5 | 4 | 6 | 8 | 8 | 5 |
| Sky | Gloomy | Gloomy | Mixed | Mixed | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Mixed | Gloomy | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 6 | Gloomy |
| Feb | 7 | Gloomy |
| Mar | 9 | Mixed |
| Apr | 10 | Mixed |
| May | 7 | Gloomy |
| Jun | 4 | Gloomy |
| Jul | 5 | Gloomy |
| Aug | 4 | Gloomy |
| Sep | 6 | Gloomy |
| Oct | 8 | Mixed |
| Nov | 8 | Gloomy |
| Dec | 5 | Gloomy |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Quán Hàu, how humid it feels changes noticeably over the year.
The more humid part of the year lasts 8.6 months, from around March 9 to November 25. The muggiest month is April, when the air feels humid, muggy or worse about 100% of the time.
The most comfortable stretch runs from around November 26 to March 8, and January is the most comfortable month — the air is dry or comfortable 21% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 5 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
| Comfortable (%) | 16 | 11 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 12 |
| Humid (%) | 28 | 22 | 11 | 3 | 0 | 0 | 0 | 0 | 0 | 3 | 12 | 27 |
| Muggy (%) | 39 | 40 | 27 | 11 | 2 | 0 | 0 | 0 | 2 | 13 | 32 | 38 |
| Oppressive (%) | 11 | 24 | 55 | 46 | 19 | 23 | 41 | 40 | 38 | 59 | 46 | 19 |
| Miserable (%) | 0 | 0 | 3 | 40 | 78 | 77 | 59 | 60 | 60 | 24 | 7 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| Jan | 5 | 16 | 28 | 39 | 11 | 0 |
| Feb | 3 | 11 | 22 | 40 | 24 | 0 |
| Mar | 0 | 3 | 11 | 27 | 55 | 3 |
| Apr | 0 | 0 | 3 | 11 | 46 | 40 |
| May | 0 | 0 | 0 | 2 | 19 | 78 |
| Jun | 0 | 0 | 0 | 0 | 23 | 77 |
| Jul | 0 | 0 | 0 | 0 | 41 | 59 |
| Aug | 0 | 0 | 0 | 0 | 40 | 60 |
| Sep | 0 | 0 | 0 | 2 | 38 | 60 |
| Oct | 0 | 1 | 3 | 13 | 59 | 24 |
| Nov | 0 | 3 | 12 | 32 | 46 | 7 |
| Dec | 4 | 12 | 27 | 38 | 19 | 1 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in Quán Hàu is typically light breeze, near 17 km/h, and varies moderately with the seasons.
The windier part of the year lasts 3.7 months, from around Oct 15 to Feb 5. The windiest month is December, averaging about 21 km/h (breezy).
The calmer part of the year runs from around Feb 6 to Jun 15, with May the calmest month at about 14 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 19 | 17 | 16 | 15 | 14 | 17 | 19 | 18 | 15 | 17 | 20 | 21 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | breezy | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 19 | light breeze |
| Feb | 17 | light breeze |
| Mar | 16 | light breeze |
| Apr | 15 | light breeze |
| May | 14 | light breeze |
| Jun | 17 | light breeze |
| Jul | 19 | light breeze |
| Aug | 18 | light breeze |
| Sep | 15 | light breeze |
| Oct | 17 | light breeze |
| Nov | 20 | breezy |
| Dec | 21 | breezy |
Hazard calendar for Quán Hàu
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Quán Hàu sits in the Pacific typhoon belt; the season peaks July–October.
Quán Hàu's monsoon runs September–December, when most of the year's rain falls.
Best time to visit Quán Hàu
To characterize how pleasant the weather is in Quán Hàu throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late April, Quán Hàu is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Quán Hàu for general outdoor tourist activities is from early February to early May, with a peak score in the second week of March.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 5.3 | 6.0 | 6.8 | 6.7 | 5.2 | 4.5 | 4.5 | 4.3 | 4.2 | 4.6 | 5.0 | 4.9 |
| Rating | fair | good | good | good | fair | fair | fair | fair | fair | fair | fair | fair |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 5.3 | fair |
| Feb | 6.0 | good |
| Mar | 6.8 | good |
| Apr | 6.7 | good |
| May | 5.2 | fair |
| Jun | 4.5 | fair |
| Jul | 4.5 | fair |
| Aug | 4.3 | fair |
| Sep | 4.2 | fair |
| Oct | 4.6 | fair |
| Nov | 5.0 | fair |
| Dec | 4.9 | fair |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Quán Hàu for hot-weather activities is from mid March to early September, with a peak score in the first week of July.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Quán Hàu, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around June (highs near 31°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 22°C), pack rain gear.
In June, Quán Hàu sees daytime highs around 31°C and nights near 28°C. Pack light clothes. Worth having: sun protection. About 6 days see rain.
Sea temperature near Quán Hàu
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea at the nearest coast (about 25 km away) is warmest in August at about 30°C and coldest in February near 22°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 22 | 22 | 23 | 25 | 28 | 29 | 29 | 30 | 29 | 28 | 26 | 24 |
| Comfort | Refreshing | Refreshing | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 22 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 23 | Refreshing |
| Apr | 25 | Warm |
| May | 28 | Warm |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 30 | Tropical |
| Sep | 29 | Tropical |
| Oct | 28 | Warm |
| Nov | 26 | Warm |
| Dec | 24 | Refreshing |
UV index (midday) in Quán Hàu by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in Quán Hàu peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 6 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 10 | 9 | 9 | 12 | 12 | 13 | 13 | 11 | 10 | 8 | 6 |
| Level | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 9 | Very high |
| Apr | 9 | Very high |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 6 | High |
Average hourly UV index in Quán Hàu
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in August the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 6.5 | 7 | 7 | 7.5 | 8 | 8.5 | 8.5 | 8.5 | 7.5 | 7 | 6.5 | 5.5 |
| UV ≥ 6 (h/day) | 4 | 4.5 | 4.5 | 5 | 6 | 6.5 | 6.5 | 6.5 | 5.5 | 5 | 3.5 | 1 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 6.5 | 4 |
| Feb | 7 | 4.5 |
| Mar | 7 | 4.5 |
| Apr | 7.5 | 5 |
| May | 8 | 6 |
| Jun | 8.5 | 6.5 |
| Jul | 8.5 | 6.5 |
| Aug | 8.5 | 6.5 |
| Sep | 7.5 | 5.5 |
| Oct | 7 | 5 |
| Nov | 6.5 | 3.5 |
| Dec | 5.5 | 1 |
Air quality in Quán Hàu by month
Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.
Air quality in Quán Hàu is worst in April — around 65 µg/m³ PM2.5 (unhealthy), about 4.9× the cleanest month (July, 13 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 20 | 26 | 62 | 65 | 21 | 14 | 13 | 14 | 16 | 20 | 18 | 21 |
| Level | Moderate | Moderate | Unhealthy | Unhealthy | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 20 | Moderate |
| Feb | 26 | Moderate |
| Mar | 62 | Unhealthy |
| Apr | 65 | Unhealthy |
| May | 21 | Moderate |
| Jun | 14 | Moderate |
| Jul | 13 | Moderate |
| Aug | 14 | Moderate |
| Sep | 16 | Moderate |
| Oct | 20 | Moderate |
| Nov | 18 | Moderate |
| Dec | 21 | Moderate |
Growing season
Quán Hàu is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Quán Hàu banks about 5,645 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around June.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 329 | 310 | 396 | 458 | 554 | 585 | 600 | 590 | 534 | 497 | 427 | 364 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 329 |
| Feb | 310 |
| Mar | 396 |
| Apr | 458 |
| May | 554 |
| Jun | 585 |
| Jul | 600 |
| Aug | 590 |
| Sep | 534 |
| Oct | 497 |
| Nov | 427 |
| Dec | 364 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Quán Hàu receives about 4.5 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.5 and 6.0 kWh/m².
The brighter stretch of the year lasts 6.4 months, from around Mar 11 to Sep 21. The brightest month is May, averaging about 6.0 kWh/m² (bright).
The dimmest month is December, down near 2.6 kWh/m² — roughly 57% less than the May peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.0 | 3.7 | 4.7 | 5.6 | 6.0 | 5.9 | 5.6 | 5.3 | 4.7 | 4.0 | 3.2 | 2.5 |
| Level | Moderate | Moderate | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 3.0 | Moderate |
| Feb | 3.7 | Moderate |
| Mar | 4.7 | Bright |
| Apr | 5.6 | Bright |
| May | 6.0 | Bright |
| Jun | 5.9 | Bright |
| Jul | 5.6 | Bright |
| Aug | 5.3 | Bright |
| Sep | 4.7 | Bright |
| Oct | 4.0 | Moderate |
| Nov | 3.2 | Moderate |
| Dec | 2.5 | Moderate |
Where is Quán Hàu?
Quán Hàu sits at 17.4°N, 106.6°E, 13 m above sea level, in Vietnam. The nearest listed city is Đồng Hới, 7.0 km away.
Topography around Quán Hàu
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Quán Hàu.
Within 3 km, the terrain around Quán Hàu has only modest variations in elevation — a maximum elevation change of 25 m around an average of 5 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 711 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,630 m.
The land around Quán Hàu is covered by cropland (30%) within 3 km, trees (35%) and water (35%) within 16 km, and trees (62%) and water (31%) within 80 km.
Vietnam travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B / C / F
- 220 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,066
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Safe drinking water
- 59%
- of population, 2024
- Homicide rate
- 1.5
- per 100k, 2011
- Road deaths
- 30.6
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 500
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Quán Hàu (17.4044°, 106.6407°, elevation 13 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).