Climate averages 1991–2020
Riyadh weather
in August.
A very hot, very dry month: the 2nd 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 Riyadh: daytime highs average 42.5°C and nights cool to about 27.2°C. By daytime temperature it is the 2nd warmest of the 12 months.
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 00 min on an average August day.
The nearest other city in this atlas is Al Kharj (86 km away). In August its highs average 43.7°C, 1.1°C warmer than Riyadh, with almost no rain (under 1 mm).
Among the 35 cities listed in Saudi Arabia, Riyadh ranks 5th 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; Riyadh is 4.8°C warmer than that mean.
From August to September, average highs fall by 3.1°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
Riyadh climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.8°C7.4°C | 7.4°C | 11 | 2.0 | 10.811 h |
| February | 23.1°C9.6°C | 9.6°C | 5.4 | 1.5 | 11.311 h |
| March | 27.3°C13.7°C | 13.7°C | 11 | 1.9 | 12.012 h |
| April | 33.1°C19.0°C | 19.0°C | 14 | 2.7 | 12.713 h |
| May | 38.6°C24.1°C | 24.1°C | 1.9 | 0.6 | 13.313 h |
| June | 41.6°C26.0°C | 26.0°C | 0 | 0.0 | 13.614 h |
| July | 42.6°C27.3°C | 27.3°C | 0 | 0.0 | 13.514 h |
| August, selected | 42.5°C27.2°C | 27.2°C | 0 | 0.0 | 13.013 h |
| September | 39.4°C24.2°C | 24.2°C | 0 | 0.0 | 12.312 h |
| October | 33.9°C19.8°C | 19.8°C | 0.9 | 0.2 | 11.612 h |
| November | 26.3°C13.9°C | 13.9°C | 11 | 2.1 | 11.011 h |
| December | 21.3°C8.9°C | 8.9°C | 9.1 | 1.7 | 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
- Al Kharj in AugustSaudi Arabia · 86 kmHigh 43.7°C · Low 27.1°C · 0 mm rain
- Ad Dawādimī in AugustSaudi Arabia · 236 kmHigh 40.1°C · Low 25.7°C · 0.1 mm rain
- Az Zulfī in AugustSaudi Arabia · 262 kmHigh 42.1°C · Low 26.5°C · 0 mm rain
- Al Hufūf in AugustSaudi Arabia · 298 kmHigh 44.5°C · Low 27.9°C · 0.1 mm rain
- Unaizah in AugustSaudi Arabia · 315 kmHigh 41.9°C · Low 25.9°C · 0 mm rain
- Buraydah in AugustSaudi Arabia · 330 kmHigh 42.6°C · Low 26.1°C · 0 mm rain
- Ar Rass in AugustSaudi Arabia · 350 kmHigh 42.1°C · Low 25.5°C · 0 mm rain
- Al Jubayl in AugustSaudi Arabia · 389 kmHigh 41.2°C · Low 29.4°C · 0.1 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 Riyadh) is explained once on the Riyadh year overview and on the Sources, method and limits page.