Climate and average weather in Thuwal
In Thuwal, the summers are muggy, sweltering, dry, and clear and the winters are warm and clear.
Over the course of the year, the temperature in Thuwal typically varies from 20°C to 36°C, and is rarely below 17°C or above 38°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 Thuwal for warm-weather activities is from early December to late March.
- Hottest
- Jul
- 36°
- Coldest
- Jan
- 20°
- Wettest
- Nov
- 29 mm
- Driest
- Jun
- 0 mm
- Rain / yr
- 68 mm
- 9 wet days
- Daylight
- 10.6–13.4 h
- shortest–longest
- Elevation
- 6 m
- 22.3°N
- Clearest
- Jun
- 7% cloud
Thuwal is human settlement in Saudi Arabia.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Thuwal 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 December to late March.
Temperature through the year
Daily average highs and lows in Thuwal, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 5.3 months, from May 14 to October 22, with daily high temperatures above 34°C. The hottest month of the year in Thuwal is July, with an average high of 36°C and low of 29°C.
The cool season lasts 2.6 months, from December 16 to March 3, with daily high temperatures below 29°C. The coldest month of the year in Thuwal is January, with an average low of 20°C and high of 27°C.
Days typically run about 7°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 28 | 29 | 32 | 34 | 35 | 36 | 36 | 36 | 34 | 31 | 29 |
| Avg low (°C) | 20 | 21 | 22 | 24 | 26 | 27 | 29 | 30 | 28 | 27 | 24 | 22 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 27 | 20 |
| Feb | 28 | 21 |
| Mar | 29 | 22 |
| Apr | 32 | 24 |
| May | 34 | 26 |
| Jun | 35 | 27 |
| Jul | 36 | 29 |
| Aug | 36 | 30 |
| Sep | 36 | 28 |
| Oct | 34 | 27 |
| Nov | 31 | 24 |
| Dec | 29 | 22 |
How hot and cold Thuwal 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, Thuwal feels like about 45°C (around August 21). About 230 days a year carry some heat stress, and 150 of them tip into dangerous heat (feels-like above 39°C), peaking in August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 27 | 28 | 30 | 33 | 38 | 41 | 43 | 45 | 45 | 41 | 33 | 29 |
| Air high (°C) | 27 | 28 | 29 | 32 | 34 | 35 | 36 | 36 | 36 | 34 | 31 | 29 |
| Feels-like low (°C) | 20 | 21 | 22 | 24 | 26 | 27 | 29 | 29 | 28 | 27 | 24 | 22 |
| Air low (°C) | 20 | 21 | 22 | 24 | 26 | 27 | 29 | 30 | 28 | 27 | 24 | 22 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 27 | 27 | 20 | 20 |
| Feb | 28 | 28 | 21 | 21 |
| Mar | 30 | 29 | 22 | 22 |
| Apr | 33 | 32 | 24 | 24 |
| May | 38 | 34 | 26 | 26 |
| Jun | 41 | 35 | 27 | 27 |
| Jul | 43 | 36 | 29 | 29 |
| Aug | 45 | 36 | 29 | 30 |
| Sep | 45 | 36 | 28 | 28 |
| Oct | 41 | 34 | 27 | 27 |
| Nov | 33 | 31 | 24 | 24 |
| Dec | 29 | 29 | 22 | 22 |
Average hourly temperature in Thuwal
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 36°C, and coldest before dawn in January, near 20°C.
Thuwal 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 | 27° / 20° | 16 | 2.2 | 10.8 | 8.3 |
| Feb | 28° / 21° | 2 | 0.6 | 11.2 | 8.4 |
| Mar | 29° / 22° | 3 | 0.6 | 11.8 | 7.2 |
| Apr | 32° / 24° | 3 | 0.5 | 12.5 | 5.6 |
| May | 34° / 26° | 1 | 0.2 | 13.1 | 4.0 |
| Jun | 35° / 27° | 0 | 0 | 13.3 | 3.3 |
| Jul | 36° / 29° | 0 | 0 | 13.2 | 2.6 |
| Aug | 36° / 30° | 0 | 0 | 12.8 | 2.6 |
| Sep | 36° / 28° | 0 | 0 | 12.1 | 3.0 |
| Oct | 34° / 27° | 2 | 0.5 | 11.5 | 3.8 |
| Nov | 31° / 24° | 29 | 2.2 | 10.9 | 5.6 |
| Dec | 29° / 22° | 12 | 2.2 | 10.7 | 7.3 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Thuwal gets about 68 mm of precipitation a year. On a typical day the chance of rain is mostly dry, and that barely changes with the seasons — rain is spread fairly evenly through the year.
November is the wettest month by volume, with 29 mm over about 2 wet days; June is the driest, with 0 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 7 | 2 | 2 | 2 | 1 | 0 | 0 | 0 | 0 | 2 | 7 | 7 |
| Rain days | 2 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 2 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 7 | 2 |
| Feb | 2 | 1 |
| Mar | 2 | 1 |
| Apr | 2 | 1 |
| May | 1 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 2 | 1 |
| Nov | 7 | 2 |
| Dec | 7 | 2 |
Monthly rainfall
Over a full year, Thuwal collects about 68 mm of rain across 9 wet days — roughly 6 mm in an average month.
It doesn’t fall evenly. November is the wettest month with 29 mm, while June is the driest at just 0 mm. The three wettest months alone bring about 83% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 16 | 2 | 3 | 3 | 1 | 0 | 0 | 0 | 0 | 2 | 29 | 12 |
| Rain days | 2 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 2 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 16 | 2 |
| Feb | 2 | 1 |
| Mar | 3 | 1 |
| Apr | 3 | 1 |
| May | 1 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 2 | 1 |
| Nov | 29 | 2 |
| Dec | 12 | 2 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Thuwal, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.
The clearer part of the year begins around August 7 and lasts for 3.6 months, ending around November 24. The clearest month is September, when the sky is clear, mostly clear, or partly cloudy 98% of the time on average.
The cloudier part of the year begins around November 25 and lasts for 5.0 months, ending around April 25. The cloudiest month is January, when it is overcast or mostly cloudy 15% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 85 | 89 | 90 | 91 | 93 | 98 | 93 | 94 | 98 | 96 | 94 | 86 |
| Cloudier (%) | 15 | 11 | 10 | 9 | 7 | 2 | 7 | 6 | 2 | 4 | 6 | 14 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 85 | 15 |
| Feb | 89 | 11 |
| Mar | 90 | 10 |
| Apr | 91 | 9 |
| May | 93 | 7 |
| Jun | 98 | 2 |
| Jul | 93 | 7 |
| Aug | 94 | 6 |
| Sep | 98 | 2 |
| Oct | 96 | 4 |
| Nov | 94 | 6 |
| Dec | 86 | 14 |
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 15, brings about 13 h 24 min of light; the shortest, around December 15, 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 | 13.1 | 13.3 | 13.2 | 12.8 | 12.1 | 11.5 | 10.9 | 10.7 |
| Sunrise (AM) | 7:10 | 7:01 | 6:38 | 6:08 | 5:48 | 5:43 | 5:52 | 6:04 | 6:14 | 6:24 | 6:41 | 7:00 |
| Sunset (PM) | 5:56 | 6:15 | 6:28 | 6:39 | 6:52 | 7:04 | 7:06 | 6:51 | 6:22 | 5:53 | 5:36 | 5:39 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.8 | 7:10 | 5:56 |
| Feb | 11.2 | 7:01 | 6:15 |
| Mar | 11.8 | 6:38 | 6:28 |
| Apr | 12.5 | 6:08 | 6:39 |
| May | 13.1 | 5:48 | 6:52 |
| Jun | 13.3 | 5:43 | 7:04 |
| Jul | 13.2 | 5:52 | 7:06 |
| Aug | 12.8 | 6:04 | 6:51 |
| Sep | 12.1 | 6:14 | 6:22 |
| Oct | 11.5 | 6:24 | 5:53 |
| Nov | 10.9 | 6:41 | 5:36 |
| Dec | 10.7 | 7:00 | 5:39 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Thuwal averages about 26 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 21 and 29 days.
The sunnier stretch runs 3.1 months, from around Aug 19 to Nov 19. The sunniest month is September, with roughly 29 sunny days (brilliant).
The greyest month is January, down near 22 sunny days — about 23% fewer than the September peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 23 | 23 | 26 | 26 | 27 | 28 | 26 | 26 | 29 | 29 | 26 | 24 |
| Sky | Bright | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant |
| Sunny days | Sky | |
|---|---|---|
| Jan | 23 | Bright |
| Feb | 23 | Brilliant |
| Mar | 26 | Brilliant |
| Apr | 26 | Brilliant |
| May | 27 | Brilliant |
| Jun | 28 | Brilliant |
| Jul | 26 | Brilliant |
| Aug | 26 | Brilliant |
| Sep | 29 | Brilliant |
| Oct | 29 | Brilliant |
| Nov | 26 | Brilliant |
| Dec | 24 | Brilliant |
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 Thuwal, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 7.7 months, from around April 5 to November 24. The muggiest month is June, when the air feels humid, muggy or worse about 100% of the time.
The most comfortable stretch runs from around November 25 to April 4, and January is the most comfortable month — the air is dry or comfortable 57% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 31 | 26 | 11 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 14 |
| Comfortable (%) | 26 | 27 | 19 | 8 | 1 | 0 | 0 | 0 | 0 | 1 | 7 | 22 |
| Humid (%) | 22 | 20 | 30 | 22 | 7 | 1 | 1 | 0 | 0 | 4 | 18 | 28 |
| Muggy (%) | 18 | 23 | 33 | 46 | 34 | 12 | 6 | 1 | 1 | 9 | 32 | 26 |
| Oppressive (%) | 3 | 5 | 6 | 22 | 52 | 65 | 50 | 26 | 16 | 37 | 37 | 9 |
| Miserable (%) | 0 | 0 | 0 | 1 | 5 | 22 | 44 | 74 | 83 | 48 | 3 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| Jan | 31 | 26 | 22 | 18 | 3 | 0 |
| Feb | 26 | 27 | 20 | 23 | 5 | 0 |
| Mar | 11 | 19 | 30 | 33 | 6 | 0 |
| Apr | 2 | 8 | 22 | 46 | 22 | 1 |
| May | 0 | 1 | 7 | 34 | 52 | 5 |
| Jun | 0 | 0 | 1 | 12 | 65 | 22 |
| Jul | 0 | 0 | 1 | 6 | 50 | 44 |
| Aug | 0 | 0 | 0 | 1 | 26 | 74 |
| Sep | 0 | 0 | 0 | 1 | 16 | 83 |
| Oct | 1 | 1 | 4 | 9 | 37 | 48 |
| Nov | 2 | 7 | 18 | 32 | 37 | 3 |
| Dec | 14 | 22 | 28 | 26 | 9 | 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.
Across the year, average wind speed in Thuwal is typically light breeze, near 15 km/h, and varies little with the seasons.
The windier part of the year lasts 1.9 months, from around May 9 to Jul 6. The windiest month is June, averaging about 16 km/h (light breeze).
The calmer part of the year runs from around Sep 13 to Dec 28, with October the calmest month at about 12 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 16 | 16 | 16 | 15 | 16 | 16 | 15 | 16 | 15 | 12 | 13 | 15 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 16 | light breeze |
| Feb | 16 | light breeze |
| Mar | 16 | light breeze |
| Apr | 15 | light breeze |
| May | 16 | light breeze |
| Jun | 16 | light breeze |
| Jul | 15 | light breeze |
| Aug | 16 | light breeze |
| Sep | 15 | light breeze |
| Oct | 12 | light breeze |
| Nov | 13 | light breeze |
| Dec | 15 | light breeze |
Hazard calendar for Thuwal
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Thuwal sees seasonal dust haze (April–September), heaviest in June.
Best time to visit Thuwal
To characterize how pleasant the weather is in Thuwal throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid March, Thuwal 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 Thuwal for general outdoor tourist activities is from early December to late March, with a peak score in the first week of February.
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) | 8.3 | 8.3 | 7.2 | 5.6 | 4.0 | 3.2 | 2.6 | 2.6 | 3.0 | 3.8 | 5.6 | 7.3 |
| Rating | ideal | ideal | good | good | fair | poor | poor | poor | poor | fair | good | good |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 8.3 | ideal |
| Feb | 8.3 | ideal |
| Mar | 7.2 | good |
| Apr | 5.6 | good |
| May | 4.0 | fair |
| Jun | 3.2 | poor |
| Jul | 2.6 | poor |
| Aug | 2.6 | poor |
| Sep | 3.0 | poor |
| Oct | 3.8 | fair |
| Nov | 5.6 | good |
| Dec | 7.3 | good |
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 Thuwal for hot-weather activities is from mid October to late May, with a peak score in the second week of March.
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 Thuwal, 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 36°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 27°C), pack light clothes and sun protection.
In July, Thuwal sees daytime highs around 36°C and nights near 29°C. Pack light clothes and sun protection.
Sea temperature near Thuwal
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea offshore is warmest in August at about 31°C and coldest in February near 25°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) | 26 | 25 | 25 | 27 | 28 | 29 | 30 | 31 | 31 | 31 | 29 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 26 | Warm |
| Feb | 25 | Warm |
| Mar | 25 | Warm |
| Apr | 27 | Warm |
| May | 28 | Tropical |
| Jun | 29 | Tropical |
| Jul | 30 | Tropical |
| Aug | 31 | Tropical |
| Sep | 31 | Tropical |
| Oct | 31 | Tropical |
| Nov | 29 | Tropical |
| Dec | 27 | Warm |
UV index (midday) in Thuwal 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 Thuwal peaks around June 13 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 4 (moderate).
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 | 8 | 10 | 10 | 11 | 11 | 11 | 10 | 10 | 9 | 6 | 4 |
| Level | High | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 8 | Very high |
| Mar | 10 | Very high |
| Apr | 10 | Extreme |
| May | 11 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Very high |
| Sep | 10 | Very high |
| Oct | 9 | Very high |
| Nov | 6 | High |
| Dec | 4 | Moderate |
Average hourly UV index in Thuwal
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 hours a day reach index 3 (protection recommended), and 6 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 | 6.5 | 7.5 | 7.5 | 8 | 8 | 8.5 | 7.5 | 7.5 | 6.5 | 5 | 3.5 |
| UV ≥ 6 (h/day) | 1.5 | 4 | 5 | 5.5 | 6 | 6 | 6 | 5.5 | 5 | 4 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 5.5 | 1.5 |
| Feb | 6.5 | 4 |
| Mar | 7.5 | 5 |
| Apr | 7.5 | 5.5 |
| May | 8 | 6 |
| Jun | 8 | 6 |
| Jul | 8.5 | 6 |
| Aug | 7.5 | 5.5 |
| Sep | 7.5 | 5 |
| Oct | 6.5 | 4 |
| Nov | 5 | 0 |
| Dec | 3.5 | 0 |
Air quality in Thuwal 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 Thuwal is worst in March — around 40 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 39 | 37 | 40 | 39 | 32 | 28 | 27 | 28 | 27 | 25 | 25 | 36 |
| Level | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 39 | Poor |
| Feb | 37 | Poor |
| Mar | 40 | Poor |
| Apr | 39 | Poor |
| May | 32 | Moderate |
| Jun | 28 | Moderate |
| Jul | 27 | Moderate |
| Aug | 28 | Moderate |
| Sep | 27 | Moderate |
| Oct | 25 | Moderate |
| Nov | 25 | Moderate |
| Dec | 36 | Poor |
Growing season
Thuwal 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. Thuwal banks about 6,808 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 427 | 397 | 480 | 534 | 622 | 636 | 695 | 708 | 659 | 636 | 536 | 478 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 427 |
| Feb | 397 |
| Mar | 480 |
| Apr | 534 |
| May | 622 |
| Jun | 636 |
| Jul | 695 |
| Aug | 708 |
| Sep | 659 |
| Oct | 636 |
| Nov | 536 |
| Dec | 478 |
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.
Thuwal receives about 6.1 kWh/m² a day of solar energy on average — intense — with a clear seasonal swing between 4.3 and 7.5 kWh/m².
The brighter stretch of the year lasts 6.7 months, from around Mar 8 to Sep 26. The brightest month is May, averaging about 7.5 kWh/m² (intense).
The dimmest month is December, down near 4.4 kWh/m² — roughly 42% less than the May peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.5 | 5.4 | 6.4 | 7.2 | 7.5 | 7.4 | 7.1 | 6.9 | 6.3 | 5.7 | 4.8 | 4.3 |
| Level | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 4.5 | Bright |
| Feb | 5.4 | Bright |
| Mar | 6.4 | Intense |
| Apr | 7.2 | Intense |
| May | 7.5 | Intense |
| Jun | 7.4 | Intense |
| Jul | 7.1 | Intense |
| Aug | 6.9 | Intense |
| Sep | 6.3 | Intense |
| Oct | 5.7 | Bright |
| Nov | 4.8 | Bright |
| Dec | 4.3 | Bright |
Where is Thuwal?
Thuwal sits at 22.3°N, 39.1°E, 6 m above sea level, in Saudi Arabia. The nearest listed city is Khulayş, 26 km away.
Topography around Thuwal
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Thuwal.
Within 3 km, the terrain around Thuwal has only modest variations in elevation — a maximum elevation change of 19 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 104 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,568 m.
The land around Thuwal is covered by bare terrain (59%) and artificial surfaces (29%) within 3 km, bare terrain (60%) and water (37%) within 16 km, and bare terrain (66%) and water (32%) within 80 km.
Saudi Arabia travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type G
- 230 V · 60 Hz
- Prices
- ≈ 47% of US
- price level, 2025
- GDP per capita
- $34,537
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Homicide rate
- 0.9
- per 100k, 2019
- Road deaths
- 35.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very low
- EF EPI 404
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 Thuwal (22.2827°, 39.1125°, elevation 6 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. 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).