Climate and average weather in Bắc Kạn
In Bắc Kạn, the summers are oppressive, hot, wet, and mostly cloudy and the winters are mild and mostly cloudy.
Over the course of the year, the temperature in Bắc Kạn typically varies from 11°C to 30°C, and is rarely below 6°C or above 33°C. July is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Bắc Kạn for warm-weather activities is from early October to late December.
- Hottest
- Jul
- 30°
- Coldest
- Jan
- 11°
- Wettest
- Jul
- 398 mm
- Driest
- Dec
- 50 mm
- Rain / yr
- 2135 mm
- 211 wet days
- Daylight
- 10.6–13.4 h
- shortest–longest
- Elevation
- 150 m
- 22.1°N
- Clearest
- Nov
- 61% cloud
Bắc Kạn is city in Vietnam.
- Density
- 329/km²
- people per km²
- Founded
- 2015
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Bắc Kạn 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 October to late December.
Temperature through the year
Daily average highs and lows in Bắc Kạn, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 5.9 months, from April 22 to October 16, with daily high temperatures above 27°C. The hottest month of the year in Bắc Kạn is July, with an average high of 30°C and low of 24°C.
The cool season lasts 2.4 months, from December 11 to February 22, with daily high temperatures below 19°C. The coldest month of the year in Bắc Kạn is January, with an average low of 11°C and high of 17°C.
Days typically run about 6°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 17 | 19 | 21 | 26 | 29 | 30 | 30 | 30 | 29 | 27 | 23 | 19 |
| Avg low (°C) | 11 | 13 | 16 | 19 | 22 | 24 | 24 | 24 | 22 | 20 | 16 | 12 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 17 | 11 |
| Feb | 19 | 13 |
| Mar | 21 | 16 |
| Apr | 26 | 19 |
| May | 29 | 22 |
| Jun | 30 | 24 |
| Jul | 30 | 24 |
| Aug | 30 | 24 |
| Sep | 29 | 22 |
| Oct | 27 | 20 |
| Nov | 23 | 16 |
| Dec | 19 | 12 |
How hot and cold Bắc Kạn 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, Bắc Kạn feels like about 36°C (around June 25). About 123 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) | 17 | 19 | 21 | 26 | 32 | 35 | 36 | 35 | 32 | 27 | 23 | 19 |
| Air high (°C) | 17 | 19 | 21 | 26 | 29 | 30 | 30 | 30 | 29 | 27 | 23 | 19 |
| Feels-like low (°C) | 11 | 13 | 16 | 19 | 22 | 24 | 24 | 24 | 22 | 20 | 16 | 12 |
| Air low (°C) | 11 | 13 | 16 | 19 | 22 | 24 | 24 | 24 | 22 | 20 | 16 | 12 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 17 | 17 | 11 | 11 |
| Feb | 19 | 19 | 13 | 13 |
| Mar | 21 | 21 | 16 | 16 |
| Apr | 26 | 26 | 19 | 19 |
| May | 32 | 29 | 22 | 22 |
| Jun | 35 | 30 | 24 | 24 |
| Jul | 36 | 30 | 24 | 24 |
| Aug | 35 | 30 | 24 | 24 |
| Sep | 32 | 29 | 22 | 22 |
| Oct | 27 | 27 | 20 | 20 |
| Nov | 23 | 23 | 16 | 16 |
| Dec | 19 | 19 | 12 | 12 |
Average hourly temperature in Bắc Kạn
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 July afternoons, near 30°C, and coldest before dawn in January, near 11°C.
Bắc Kạn 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 | 17° / 11° | 68 | 12.5 | 10.8 | 4.9 |
| Feb | 19° / 13° | 59 | 11.7 | 11.2 | 5.3 |
| Mar | 21° / 16° | 101 | 16.3 | 11.8 | 5.3 |
| Apr | 26° / 19° | 128 | 17.7 | 12.5 | 5.2 |
| May | 29° / 22° | 267 | 22.5 | 13 | 3.9 |
| Jun | 30° / 24° | 386 | 25.8 | 13.3 | 2.9 |
| Jul | 30° / 24° | 398 | 27.8 | 13.2 | 2.8 |
| Aug | 30° / 24° | 344 | 26.7 | 12.8 | 2.9 |
| Sep | 29° / 22° | 181 | 18.9 | 12.1 | 4.1 |
| Oct | 27° / 20° | 85 | 12.5 | 11.5 | 6.1 |
| Nov | 23° / 16° | 68 | 9.6 | 10.9 | 6.7 |
| Dec | 19° / 12° | 50 | 9.2 | 10.7 | 6.1 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Bắc Kạn gets about 2135 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 5.1 months, from around Apr 17 to Sep 19, peaking in July at about 91% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Dec 19.
July is the wettest month by volume, with 398 mm over about 28 wet days; December is the driest, with 50 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 39 | 42 | 52 | 59 | 73 | 85 | 90 | 86 | 63 | 40 | 33 | 30 |
| Rain days | 13 | 12 | 16 | 18 | 23 | 26 | 28 | 27 | 19 | 13 | 10 | 9 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 39 | 13 |
| Feb | 42 | 12 |
| Mar | 52 | 16 |
| Apr | 59 | 18 |
| May | 73 | 23 |
| Jun | 85 | 26 |
| Jul | 90 | 28 |
| Aug | 86 | 27 |
| Sep | 63 | 19 |
| Oct | 40 | 13 |
| Nov | 33 | 10 |
| Dec | 30 | 9 |
Monthly rainfall
Over a full year, Bắc Kạn collects about 2135 mm of rain across 211 wet days — roughly 178 mm in an average month.
It doesn’t fall evenly. July is the wettest month with 398 mm, while December is the driest at just 50 mm. The three wettest months alone bring about 53% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 68 | 59 | 101 | 128 | 267 | 386 | 398 | 344 | 181 | 85 | 68 | 50 |
| Rain days | 13 | 12 | 16 | 18 | 23 | 26 | 28 | 27 | 19 | 13 | 10 | 9 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 68 | 13 |
| Feb | 59 | 12 |
| Mar | 101 | 16 |
| Apr | 128 | 18 |
| May | 267 | 23 |
| Jun | 386 | 26 |
| Jul | 398 | 28 |
| Aug | 344 | 27 |
| Sep | 181 | 19 |
| Oct | 85 | 13 |
| Nov | 68 | 10 |
| Dec | 50 | 9 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Bắc Kạn, 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 September 1 and lasts for 4.2 months, ending around January 5. The clearest month is October, when the sky is clear, mostly clear, or partly cloudy 43% of the time on average.
The cloudier part of the year begins around May 14 and lasts for 3.6 months, ending around August 31. The cloudiest month is June, when it is overcast or mostly cloudy 92% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 20 | 20 | 18 | 23 | 22 | 8 | 11 | 18 | 34 | 43 | 41 | 35 |
| Cloudier (%) | 80 | 80 | 82 | 77 | 78 | 92 | 89 | 82 | 66 | 57 | 59 | 65 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 20 | 80 |
| Feb | 20 | 80 |
| Mar | 18 | 82 |
| Apr | 23 | 77 |
| May | 22 | 78 |
| Jun | 8 | 92 |
| Jul | 11 | 89 |
| Aug | 18 | 82 |
| Sep | 34 | 66 |
| Oct | 43 | 57 |
| Nov | 41 | 59 |
| Dec | 35 | 65 |
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 June 18, brings about 13 h 24 min of light; the shortest, around December 18, only 10 h 36 min — a swing of roughly 2 h 48 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.8 | 11.2 | 11.8 | 12.5 | 13.0 | 13.3 | 13.2 | 12.8 | 12.1 | 11.5 | 10.9 | 10.7 |
| Sunrise (AM) | 6:42 | 6:34 | 6:11 | 5:42 | 5:21 | 5:17 | 5:25 | 5:38 | 5:47 | 5:57 | 6:14 | 6:33 |
| Sunset (PM) | 5:29 | 5:48 | 6:02 | 6:12 | 6:25 | 6:37 | 6:39 | 6:24 | 5:55 | 5:26 | 5:10 | 5:12 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.8 | 6:42 | 5:29 |
| Feb | 11.2 | 6:34 | 5:48 |
| Mar | 11.8 | 6:11 | 6:02 |
| Apr | 12.5 | 5:42 | 6:12 |
| May | 13.0 | 5:21 | 6:25 |
| Jun | 13.3 | 5:17 | 6:37 |
| Jul | 13.2 | 5:25 | 6:39 |
| Aug | 12.8 | 5:38 | 6:24 |
| Sep | 12.1 | 5:47 | 5:55 |
| Oct | 11.5 | 5:57 | 5:26 |
| Nov | 10.9 | 6:14 | 5:10 |
| Dec | 10.7 | 6:33 | 5:12 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Bắc Kạn averages about 4 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 1 and 8 days.
The sunnier stretch runs 4.2 months, from around Sep 5 to Jan 9. The sunniest month is November, with roughly 7 sunny days (gloomy).
The greyest month is June, down near 1 sunny days — about 89% fewer than the November peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 4 | 3 | 3 | 3 | 3 | 1 | 1 | 3 | 6 | 7 | 7 | 7 |
| Sky | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 4 | Gloomy |
| Feb | 3 | Gloomy |
| Mar | 3 | Gloomy |
| Apr | 3 | Gloomy |
| May | 3 | Gloomy |
| Jun | 1 | Gloomy |
| Jul | 1 | Gloomy |
| Aug | 3 | Gloomy |
| Sep | 6 | Gloomy |
| Oct | 7 | Gloomy |
| Nov | 7 | Gloomy |
| Dec | 7 | 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 Bắc Kạn, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 7.0 months, from around March 30 to October 27. The muggiest month is May, when the air feels humid, muggy or worse about 99% of the time.
The most comfortable stretch runs from around October 28 to March 29, and December is the most comfortable month — the air is dry or comfortable 81% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 63 | 48 | 23 | 4 | 0 | 0 | 0 | 0 | 0 | 5 | 26 | 57 |
| Comfortable (%) | 19 | 21 | 21 | 11 | 1 | 0 | 0 | 0 | 1 | 11 | 25 | 25 |
| Humid (%) | 16 | 21 | 25 | 18 | 7 | 0 | 0 | 0 | 6 | 23 | 23 | 14 |
| Muggy (%) | 2 | 10 | 26 | 30 | 20 | 4 | 0 | 1 | 19 | 36 | 21 | 4 |
| Oppressive (%) | 0 | 0 | 5 | 36 | 53 | 41 | 41 | 58 | 61 | 25 | 5 | 0 |
| Miserable (%) | 0 | 0 | 0 | 1 | 18 | 54 | 59 | 41 | 13 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| Jan | 63 | 19 | 16 | 2 | 0 | 0 |
| Feb | 48 | 21 | 21 | 10 | 0 | 0 |
| Mar | 23 | 21 | 25 | 26 | 5 | 0 |
| Apr | 4 | 11 | 18 | 30 | 36 | 1 |
| May | 0 | 1 | 7 | 20 | 53 | 18 |
| Jun | 0 | 0 | 0 | 4 | 41 | 54 |
| Jul | 0 | 0 | 0 | 0 | 41 | 59 |
| Aug | 0 | 0 | 0 | 1 | 58 | 41 |
| Sep | 0 | 1 | 6 | 19 | 61 | 13 |
| Oct | 5 | 11 | 23 | 36 | 25 | 0 |
| Nov | 26 | 25 | 23 | 21 | 5 | 0 |
| Dec | 57 | 25 | 14 | 4 | 0 | 0 |
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.
Wind in Bắc Kạn is steady company: average speeds sit near 5 km/h — calm — in every month of the year, with no meaningful windy or calm season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 5 | 5 | 6 | 6 | 5 | 5 | 4 | 4 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 5 | calm |
| Feb | 5 | calm |
| Mar | 6 | calm |
| Apr | 6 | calm |
| May | 5 | calm |
| Jun | 5 | calm |
| Jul | 4 | calm |
| Aug | 4 | calm |
| Sep | 5 | calm |
| Oct | 5 | calm |
| Nov | 5 | calm |
| Dec | 5 | calm |
Hazard calendar for Bắc Kạn
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Bắc Kạn's monsoon runs May–September, when most of the year's rain falls.
Best time to visit Bắc Kạn
To characterize how pleasant the weather is in Bắc Kạn throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late December, Bắc Kạn 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 Bắc Kạn for general outdoor tourist activities is from early October to early January, with a peak score in the second week of November.
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) | 5.0 | 5.3 | 5.3 | 5.2 | 3.9 | 2.9 | 2.8 | 3.0 | 4.2 | 6.1 | 6.7 | 6.1 |
| Rating | fair | fair | fair | fair | fair | poor | poor | poor | fair | good | good | good |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 5.0 | fair |
| Feb | 5.3 | fair |
| Mar | 5.3 | fair |
| Apr | 5.2 | fair |
| May | 3.9 | fair |
| Jun | 2.9 | poor |
| Jul | 2.8 | poor |
| Aug | 3.0 | poor |
| Sep | 4.2 | fair |
| Oct | 6.1 | good |
| Nov | 6.7 | good |
| Dec | 6.1 | good |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best times of year to visit Bắc Kạn for hot-weather activities run from mid April to early May and again from mid September to late November, with a peak score in the last week of October.
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 Bắc Kạn, 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 July (highs near 30°C), the essentials are light clothes and rain gear. In the cold season around January (highs near 17°C), pack a warm layer and rain gear.
In July, Bắc Kạn sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. About 28 days see rain.
UV index (midday) in Bắc Kạn 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 Bắc Kạn peaks around June 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 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) | 6 | 7 | 10 | 6 | 8 | 12 | 12 | 11 | 9 | 8 | 6 | 6 |
| Level | High | Very high | Very high | High | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 7 | Very high |
| Mar | 10 | Very high |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 8 | Very high |
| Nov | 6 | High |
| Dec | 6 | High |
Average hourly UV index in Bắc Kạn
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 June 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) | 5.5 | 6 | 7 | 6.5 | 7.5 | 8.5 | 8.5 | 8 | 7 | 6.5 | 5.5 | 5 |
| UV ≥ 6 (h/day) | 1 | 3 | 4.5 | 2 | 4.5 | 6.5 | 6.5 | 5.5 | 4.5 | 3.5 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 5.5 | 1 |
| Feb | 6 | 3 |
| Mar | 7 | 4.5 |
| Apr | 6.5 | 2 |
| May | 7.5 | 4.5 |
| Jun | 8.5 | 6.5 |
| Jul | 8.5 | 6.5 |
| Aug | 8 | 5.5 |
| Sep | 7 | 4.5 |
| Oct | 6.5 | 3.5 |
| Nov | 5.5 | 0 |
| Dec | 5 | 0 |
Air quality in Bắc Kạn 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 Bắc Kạn is worst in April — around 48 µg/m³ PM2.5 (poor), about 2.3× the cleanest month (July, 21 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) | 41 | 44 | 47 | 48 | 33 | 24 | 21 | 21 | 25 | 30 | 37 | 42 |
| Level | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 41 | Poor |
| Feb | 44 | Poor |
| Mar | 47 | Poor |
| Apr | 48 | Poor |
| May | 33 | Moderate |
| Jun | 24 | Moderate |
| Jul | 21 | Moderate |
| Aug | 21 | Moderate |
| Sep | 25 | Moderate |
| Oct | 30 | Moderate |
| Nov | 37 | Poor |
| Dec | 42 | Poor |
Growing season
Bắc Kạn 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. Bắc Kạn banks about 4,311 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 129 | 162 | 267 | 376 | 479 | 506 | 527 | 523 | 473 | 408 | 287 | 174 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 129 |
| Feb | 162 |
| Mar | 267 |
| Apr | 376 |
| May | 479 |
| Jun | 506 |
| Jul | 527 |
| Aug | 523 |
| Sep | 473 |
| Oct | 408 |
| Nov | 287 |
| Dec | 174 |
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.
Bắc Kạn receives about 3.5 kWh/m² a day of solar energy on average — moderate — with a clear seasonal swing between 2.0 and 4.4 kWh/m².
The brighter stretch of the year lasts 6.5 months, from around Apr 11 to Oct 26. The brightest month is August, averaging about 4.4 kWh/m² (bright).
The dimmest month is January, down near 2.1 kWh/m² — roughly 52% less than the August peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 2.0 | 2.4 | 2.9 | 3.7 | 4.3 | 4.4 | 4.3 | 4.4 | 4.3 | 3.7 | 3.0 | 2.5 |
| Level | Moderate | Moderate | Moderate | Moderate | Bright | Bright | Bright | Bright | Bright | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 2.0 | Moderate |
| Feb | 2.4 | Moderate |
| Mar | 2.9 | Moderate |
| Apr | 3.7 | Moderate |
| May | 4.3 | Bright |
| Jun | 4.4 | Bright |
| Jul | 4.3 | Bright |
| Aug | 4.4 | Bright |
| Sep | 4.3 | Bright |
| Oct | 3.7 | Moderate |
| Nov | 3.0 | Moderate |
| Dec | 2.5 | Moderate |
Where is Bắc Kạn?
Bắc Kạn sits at 22.1°N, 105.8°E, 150 m above sea level, in Vietnam. The nearest listed city is Thị Trấn Đại Từ, 61 km away.
Topography around Bắc Kạn
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bắc Kạn.
Within 3 km, the terrain around Bắc Kạn has significant variations in elevation — a maximum elevation change of 284 m around an average of 189 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,438 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,052 m.
The land around Bắc Kạn is covered by trees (79%) within 3 km, trees (96%) within 16 km, and trees (94%) 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 Bắc Kạn (22.147°, 105.8348°, elevation 150 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. 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).