Climate averages 1991–2020
Ar Rass weather
in August.
A very hot, very dry month: the warmest and one of the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a very hot month in Ar Rass: daytime highs average 42.1°C and nights cool to about 25.5°C. By daytime temperature it is the warmest month of the year.
Rain is very rare: less than 1 mm falls in a typical August (one of the driest months of the year). Daylight, from sunrise to sunset, lasts about 13 h 03 min on an average August day.
The nearest other city in this atlas is Unaizah (56 km away). In August its highs average 41.9°C, about as warm as Ar Rass, with almost no rain (under 1 mm).
Among the 35 cities listed in Saudi Arabia, Ar Rass ranks joint 7th of 35 for the warmest August highs and joint 1st of 35 for the driest August (rainfall, lowest first). The mean August high of those 35 cities is 37.8°C; Ar Rass is 4.3°C warmer than that mean.
From August to September, average highs fall by 2.6°C to 39.4°C, and monthly rainfall stays under 1 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ar Rass climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.3°C6.3°C | 6.3°C | 13 | 2.4 | 10.711 h |
| February | 22.6°C8.1°C | 8.1°C | 5.9 | 1.1 | 11.311 h |
| March | 26.8°C12.2°C | 12.2°C | 14 | 2.2 | 12.012 h |
| April | 32.3°C17.3°C | 17.3°C | 13 | 2.7 | 12.813 h |
| May | 37.7°C22.1°C | 22.1°C | 1.7 | 0.4 | 13.413 h |
| June | 40.8°C24.1°C | 24.1°C | 0 | 0.0 | 13.714 h |
| July | 41.7°C25.0°C | 25.0°C | 0 | 0.0 | 13.614 h |
| August, selected | 42.1°C25.5°C | 25.5°C | 0 | 0.0 | 13.013 h |
| September | 39.4°C23.0°C | 23.0°C | 0.1 | 0.1 | 12.312 h |
| October | 33.9°C18.4°C | 18.4°C | 2.7 | 0.4 | 11.612 h |
| November | 25.8°C12.8°C | 12.8°C | 20 | 3.0 | 10.911 h |
| December | 20.7°C8.0°C | 8.0°C | 12 | 2.3 | 10.611 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Unaizah in AugustSaudi Arabia · 56 kmHigh 41.9°C · Low 25.9°C · 0 mm rain
- Buraydah in AugustSaudi Arabia · 70 kmHigh 42.6°C · Low 26.1°C · 0 mm rain
- Az Zulfī in AugustSaudi Arabia · 140 kmHigh 42.1°C · Low 26.5°C · 0 mm rain
- Ad Dawādimī in AugustSaudi Arabia · 176 kmHigh 40.1°C · Low 25.7°C · 0.1 mm rain
- Ha'il in AugustSaudi Arabia · 257 kmHigh 39.4°C · Low 25.2°C · 0.1 mm rain
- Riyadh in AugustSaudi Arabia · 350 kmHigh 42.5°C · Low 27.2°C · 0 mm rain
- Hafar Al-Batin in AugustSaudi Arabia · 376 kmHigh 43.8°C · Low 27.6°C · 0 mm rain
- Madinah in AugustSaudi Arabia · 421 kmHigh 42.4°C · Low 26.3°C · 1.7 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Ar Rass) is explained once on the Ar Rass year overview and on the Sources, method and limits page.