Riyadh is warmest in July, averaging 45° by day and 29° at night. The wettest month is January with 25 mm, and the year brings about 73 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 22° | 8° | 25 mm | 10.6 h | Sightseeing |
| February | 25° | 10° | 3 mm | 11.1 h | Sightseeing |
| March | 30° | 14° | 9 mm | 11.8 h | Beach weather |
| April | 34° | 19° | 21 mm | 12.6 h | Beach weather |
| May | 40° | 24° | 3 mm | 13.2 h | Very hot |
| June | 44° | 26° | 0 mm | 13.5 h | Very hot |
| July | 45° | 29° | 0 mm | 13.4 h | Very hot |
| August | 44° | 28° | 0 mm | 12.9 h | Very hot |
| September | 41° | 25° | 0 mm | 12.1 h | Very hot |
| October | 36° | 21° | 0 mm | 11.4 h | Beach weather |
| November | 30° | 15° | 3 mm | 10.8 h | Beach weather |
| December | 24° | 9° | 9 mm | 10.5 h | Sightseeing |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: March, April, October and November — highs around 32°, nights no colder than 14°, and at most 21 mm of rain in a month.
Walking the city: January, February and December — highs of 22–25° and no more than 25 mm of rain a month.
Serious heat: In May, June, July, August and September the average high reaches 45°.