| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 20.6° | 8.9° | 22.5mm | 4.3 | 91 |
| February | 24° | 11.4° | 3mm | 0.8 | 98 |
| March | 28.4° | 15.2° | 67.3mm | 6 | 82 |
| April | 33.8° | 20.4° | 37.8mm | 6.3 | 60 |
| May | 39.7° | 26.4° | 5.3mm | 1.3 | 47 |
| June | 42.9° | 28.7° | 0mm | 0 | 40 |
| July | 43.8° | 29.8° | 0mm | 0 | 40 |
| August | 44° | 30° | 1.5mm | 0.3 | 39 |
| September | 40.7° | 26.4° | 0mm | 0 | 45 |
| October | 35.3° | 21.4° | 4mm | 1.3 | 64 |
| November | 27.5° | 15.2° | 27.5mm | 4.5 | 89 |
| December | 22.9° | 11° | 18mm | 2.8 | 94 |
January in Riyadh averages a daily high of 20.6°C with nights around 8.9°C. Expect roughly 4.3 wet days totalling 22.5mm. Comfortable conditions for being outdoors all day.
February in Riyadh averages a daily high of 24°C with nights around 11.4°C. Rain is rare — about 0.8 wet days and 3mm across the month. Comfortable conditions for being outdoors all day.
March in Riyadh averages a daily high of 28.4°C with nights around 15.2°C. Expect roughly 6 wet days totalling 67.3mm. Comfortable conditions for being outdoors all day.
April in Riyadh averages a daily high of 33.8°C with nights around 20.4°C. Expect roughly 6.3 wet days totalling 37.8mm. Generally workable, with some weather to plan around.
May in Riyadh averages a daily high of 39.7°C with nights around 26.4°C. Rain is rare — about 1.3 wet days and 5.3mm across the month. Demanding conditions — pack for it and plan indoor options.
June in Riyadh averages a daily high of 42.9°C with nights around 28.7°C. Rain is rare — about 0 wet days and 0mm across the month. Demanding conditions — pack for it and plan indoor options.
July in Riyadh averages a daily high of 43.8°C with nights around 29.8°C. Rain is rare — about 0 wet days and 0mm across the month. Demanding conditions — pack for it and plan indoor options.
August in Riyadh averages a daily high of 44°C with nights around 30°C. Rain is rare — about 0.3 wet days and 1.5mm across the month. Demanding conditions — pack for it and plan indoor options.
September in Riyadh averages a daily high of 40.7°C with nights around 26.4°C. Rain is rare — about 0 wet days and 0mm across the month. Demanding conditions — pack for it and plan indoor options.
October in Riyadh averages a daily high of 35.3°C with nights around 21.4°C. Rain is rare — about 1.3 wet days and 4mm across the month. Generally workable, with some weather to plan around.
November in Riyadh averages a daily high of 27.5°C with nights around 15.2°C. Expect roughly 4.5 wet days totalling 27.5mm. Comfortable conditions for being outdoors all day.
December in Riyadh averages a daily high of 22.9°C with nights around 11°C. Rain is rare — about 2.8 wet days and 18mm across the month. Comfortable conditions for being outdoors all day.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Riyadh peaks at 98.
Based on 30 years of records, December–February scores highest for comfort in Riyadh, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 44°C.
March is the wettest, averaging 67.3mm of rain across roughly 6 wet days.
January is the coolest month, with average daily highs around 20.6°C.