Climate averages 1991–2020
Najrān weather
in December.
A warm, very dry month: the coolest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Najrān: daytime highs average 25.4°C and nights cool to about 9.7°C. By daytime temperature it is the coolest month of the year.
Rain is very rare: less than 1 mm falls in a typical December (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 06 min on an average December day.
The nearest other city in this atlas is Şabyā (164 km away). In December its highs average 29.2°C, 3.8°C warmer than Najrān, with 11 mm of rain.
Among the 35 cities listed in Saudi Arabia, Najrān ranks 10th of 35 for the warmest December highs and 1st of 35 for the driest December (rainfall, lowest first). The mean December high of those 35 cities is 22.3°C; Najrān is 3.1°C warmer than that mean.
From December to January, average highs rise by 0.3°C to 25.7°C, and monthly rainfall rises from under 1 mm to 1.6 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Şabyā in DecemberSaudi Arabia · 164 kmHigh 29.2°C · Low 22.8°C · 11 mm rain
- Khamis Mushait in DecemberSaudi Arabia · 173 kmHigh 21.7°C · Low 11.3°C · 5.9 mm rain
- Jizan in DecemberSaudi Arabia · 180 kmHigh 28.8°C · Low 24.0°C · 15 mm rain
- Abha in DecemberSaudi Arabia · 190 kmHigh 18.7°C · Low 10.9°C · 11 mm rain
- ‘Amrān in DecemberYemen · 205 kmHigh 20.1°C · Low 10.3°C · 2.8 mm rain
- Sanaa in DecemberYemen · 238 kmHigh 21.7°C · Low 8.8°C · 2.6 mm rain
- Bariq in DecemberSaudi Arabia · 282 kmHigh 28.3°C · Low 19.9°C · 9.6 mm rain
- Bīshah in DecemberSaudi Arabia · 322 kmHigh 25.5°C · Low 10.0°C · 1.1 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 Najrān) is explained once on the Najrān year overview and on the Sources, method and limits page.