Climate averages 1991–2020
Rouissat weather
in September.
A very hot, very dry month: the 4th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a very hot month in Rouissat: daytime highs average 36.0°C and nights cool to about 23.1°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 3.0 mm of rain on fewer than one day, which makes September a very dry month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 23 min on an average September day.
The nearest other city in this atlas is Ouargla (4 km away). In September its highs average 35.9°C, about as warm as Rouissat, with 3.0 mm of rain.
Among the 55 cities listed in Algeria, Rouissat ranks 1st of 55 for the warmest September highs and joint 2nd of 55 for the driest September (rainfall, lowest first). The mean September high of those 55 cities is 29.2°C; Rouissat is 6.8°C warmer than that mean.
From September to October, average highs fall by 6.5°C to 29.5°C, and monthly rainfall rises from 3.0 mm to 3.7 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
Rouissat climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 16.4°C4.8°C | 4.8°C | 7.2 | 1.2 | 10.310 h |
| February | 19.0°C6.5°C | 6.5°C | 2.6 | 0.8 | 11.011 h |
| March | 23.7°C10.5°C | 10.5°C | 5.1 | 1.0 | 12.012 h |
| April | 28.5°C14.9°C | 14.9°C | 3.5 | 0.7 | 12.913 h |
| May | 33.7°C19.8°C | 19.8°C | 1.9 | 0.3 | 13.814 h |
| June | 38.5°C24.2°C | 24.2°C | 0.3 | 0.1 | 14.214 h |
| July | 41.5°C26.9°C | 26.9°C | 0.2 | 0.0 | 14.014 h |
| August | 40.7°C26.7°C | 26.7°C | 0.4 | 0.0 | 13.313 h |
| September, selected | 36.0°C23.1°C | 23.1°C | 3.0 | 0.7 | 12.412 h |
| October | 29.5°C17.3°C | 17.3°C | 3.7 | 0.6 | 11.411 h |
| November | 21.9°C10.4°C | 10.4°C | 3.9 | 0.9 | 10.611 h |
| December | 17.0°C6.0°C | 6.0°C | 4.3 | 1.1 | 10.110 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
- Ouargla in SeptemberAlgeria · 4 kmHigh 35.9°C · Low 23.1°C · 3.0 mm rain
- Touggourt in SeptemberAlgeria · 148 kmHigh 34.2°C · Low 21.9°C · 4.0 mm rain
- Ghardaïa in SeptemberAlgeria · 170 kmHigh 33.6°C · Low 21.7°C · 7.8 mm rain
- El Oued in SeptemberAlgeria · 213 kmHigh 34.3°C · Low 22.3°C · 5.7 mm rain
- Messaad in SeptemberAlgeria · 302 kmHigh 30.2°C · Low 18.1°C · 25 mm rain
- Laghouat in SeptemberAlgeria · 312 kmHigh 31.0°C · Low 17.9°C · 22 mm rain
- Biskra in SeptemberAlgeria · 327 kmHigh 32.9°C · Low 22.0°C · 17 mm rain
- Djelfa in SeptemberAlgeria · 362 kmHigh 27.5°C · Low 15.3°C · 36 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 Rouissat) is explained once on the Rouissat year overview and on the Sources, method and limits page.
Ouargla lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.