Climate averages 1991–2020
Najrān weather
in September.
A very hot, very dry month: the 5th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a very hot month in Najrān: daytime highs average 34.4°C and nights cool to about 19.7°C. By daytime temperature it is the 5th warmest of the 12 months.
Rain is very rare: less than 1 mm falls in a typical September (the driest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 15 min on an average September day.
The nearest other city in this atlas is Şabyā (164 km away). In September its highs average 35.7°C, 1.4°C warmer than Najrān, with 28 mm of rain.
Among the 35 cities listed in Saudi Arabia, Najrān ranks 29th of 35 for the warmest September highs and joint 13th of 35 for the driest September (rainfall, lowest first). The mean September high of those 35 cities is 36.0°C; Najrān is 1.6°C cooler than that mean.
From September to October, average highs fall by 4.6°C to 29.8°C, and monthly rainfall rises from under 1 mm to 3.3 mm.
The annual picture
September 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
Najrān climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.7°C9.6°C | 9.6°C | 1.6 | 0.5 | 11.211 h |
| February | 28.1°C11.8°C | 11.8°C | 1.9 | 0.5 | 11.612 h |
| March | 30.3°C15.1°C | 15.1°C | 9.5 | 2.0 | 12.012 h |
| April | 32.2°C18.0°C | 18.0°C | 13 | 3.6 | 12.513 h |
| May | 34.7°C20.5°C | 20.5°C | 4.3 | 1.0 | 12.913 h |
| June | 36.8°C20.4°C | 20.4°C | 1.4 | 0.1 | 13.213 h |
| July | 37.1°C21.5°C | 21.5°C | 1.6 | 0.4 | 13.113 h |
| August | 36.7°C21.3°C | 21.3°C | 2.4 | 0.5 | 12.713 h |
| September, selected | 34.4°C19.7°C | 19.7°C | 0.1 | 0.0 | 12.212 h |
| October | 29.8°C16.3°C | 16.3°C | 3.3 | 0.5 | 11.812 h |
| November | 27.0°C12.9°C | 12.9°C | 0.8 | 0.2 | 11.311 h |
| December | 25.4°C9.7°C | 9.7°C | 0.2 | 0.0 | 11.111 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
September in nearby cities
- Şabyā in SeptemberSaudi Arabia · 164 kmHigh 35.7°C · Low 29.2°C · 28 mm rain
- Khamis Mushait in SeptemberSaudi Arabia · 173 kmHigh 29.2°C · Low 18.3°C · 35 mm rain
- Jizan in SeptemberSaudi Arabia · 180 kmHigh 35.0°C · Low 30.0°C · 5.1 mm rain
- Abha in SeptemberSaudi Arabia · 190 kmHigh 24.6°C · Low 15.7°C · 190 mm rain
- ‘Amrān in SeptemberYemen · 205 kmHigh 24.2°C · Low 14.6°C · 34 mm rain
- Sanaa in SeptemberYemen · 238 kmHigh 27.2°C · Low 14.7°C · 22 mm rain
- Bariq in SeptemberSaudi Arabia · 282 kmHigh 35.4°C · Low 25.7°C · 70 mm rain
- Bīshah in SeptemberSaudi Arabia · 322 kmHigh 36.2°C · Low 20.5°C · 0 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 Najrān) is explained once on the Najrān year overview and on the Sources, method and limits page.