Climate averages 1991–2020
Tamanghasset weather
in September.
A hot, very dry month: the 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Tamanghasset: daytime highs average 33.4°C and nights cool to about 20.7°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 1.8 mm of rain on fewer than one day, which makes September a very dry month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 18 min on an average September day.
The nearest other city in this atlas is Arlit (490 km away). In September its highs average 40.0°C, 6.6°C warmer than Tamanghasset, with 4.4 mm of rain.
Among the 55 cities listed in Algeria, Tamanghasset ranks 7th of 55 for the warmest September highs and 1st of 55 for the driest September (rainfall, lowest first). The mean September high of those 55 cities is 29.2°C; Tamanghasset is 4.2°C warmer than that mean.
From September to October, average highs fall by 3.9°C to 29.5°C, and monthly rainfall rises from 1.8 mm to 2.1 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
Tamanghasset climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.4°C5.2°C | 5.2°C | 2.0 | 0.5 | 10.911 h |
| February | 22.1°C7.4°C | 7.4°C | 1.3 | 0.3 | 11.411 h |
| March | 25.8°C11.1°C | 11.1°C | 3.6 | 0.7 | 12.012 h |
| April | 30.6°C15.9°C | 15.9°C | 0.7 | 0.1 | 12.713 h |
| May | 33.7°C19.9°C | 19.9°C | 2.7 | 0.5 | 13.213 h |
| June | 35.6°C22.2°C | 22.2°C | 1.5 | 0.4 | 13.514 h |
| July | 35.4°C22.5°C | 22.5°C | 1.5 | 0.4 | 13.413 h |
| August | 34.6°C22.3°C | 22.3°C | 5.2 | 1.8 | 12.913 h |
| September, selected | 33.4°C20.7°C | 20.7°C | 1.8 | 0.7 | 12.312 h |
| October | 29.5°C16.5°C | 16.5°C | 2.1 | 0.7 | 11.612 h |
| November | 24.5°C11.1°C | 11.1°C | 0.7 | 0.2 | 11.111 h |
| December | 20.8°C7.0°C | 7.0°C | 1.0 | 0.4 | 10.811 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
- Arlit in SeptemberNiger · 490 kmHigh 40.0°C · Low 25.8°C · 4.4 mm rain
- Agadez in SeptemberNiger · 696 kmHigh 39.0°C · Low 25.4°C · 4.5 mm rain
- El Oued in SeptemberAlgeria · 1183 kmHigh 34.3°C · Low 22.3°C · 5.7 mm rain
- Djelfa in SeptemberAlgeria · 1340 kmHigh 27.5°C · Low 15.3°C · 36 mm rain
- Biskra in SeptemberAlgeria · 1342 kmHigh 32.9°C · Low 22.0°C · 17 mm rain
- Batna in SeptemberAlgeria · 1421 kmHigh 26.8°C · Low 14.4°C · 46 mm rain
- Tébessa in SeptemberAlgeria · 1426 kmHigh 28.7°C · Low 15.7°C · 38 mm rain
- Sétif in SeptemberAlgeria · 1491 kmHigh 25.2°C · Low 14.3°C · 47 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 Tamanghasset) is explained once on the Tamanghasset year overview and on the Sources, method and limits page.