Climate averages 1991–2020
Mostaganem weather
in September.
A hot, very dry month: the 3rd warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Mostaganem: daytime highs average 28.8°C and nights cool to about 20.1°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 14 mm of rain on roughly 3 days, which makes September a very dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 26 min on an average September day.
The nearest other city in this atlas is Relizane (47 km away). In September its highs average 31.6°C, 2.8°C warmer than Mostaganem, with 18 mm of rain.
Among the 55 cities listed in Algeria, Mostaganem ranks joint 28th of 55 for the warmest September highs and joint 8th of 55 for the driest September (rainfall, lowest first). The mean September high of those 55 cities is 29.2°C; Mostaganem is 0.5°C cooler than that mean.
From September to October, average highs fall by 3.9°C to 24.9°C, and monthly rainfall rises from 14 mm to 31 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
Mostaganem climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 15.4°C7.4°C | 7.4°C | 50 | 8.0 | 10.010 h |
| February | 16.1°C7.8°C | 7.8°C | 42 | 6.9 | 10.911 h |
| March | 18.6°C9.6°C | 9.6°C | 42 | 6.3 | 11.912 h |
| April | 20.7°C11.9°C | 11.9°C | 36 | 6.0 | 13.113 h |
| May | 24.2°C15.0°C | 15.0°C | 23 | 3.5 | 14.014 h |
| June | 28.4°C18.6°C | 18.6°C | 3.8 | 0.9 | 14.615 h |
| July | 31.7°C21.4°C | 21.4°C | 0.4 | 0.0 | 14.314 h |
| August | 32.3°C22.4°C | 22.4°C | 2.3 | 0.4 | 13.514 h |
| September, selected | 28.8°C20.1°C | 20.1°C | 14 | 2.7 | 12.412 h |
| October | 24.9°C16.5°C | 16.5°C | 31 | 5.2 | 11.311 h |
| November | 19.5°C12.0°C | 12.0°C | 68 | 8.5 | 10.310 h |
| December | 16.3°C9.0°C | 9.0°C | 46 | 7.0 | 9.810 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
- Relizane in SeptemberAlgeria · 47 kmHigh 31.6°C · Low 18.5°C · 18 mm rain
- Mascara in SeptemberAlgeria · 60 kmHigh 29.1°C · Low 16.5°C · 23 mm rain
- Oran in SeptemberAlgeria · 70 kmHigh 27.3°C · Low 20.2°C · 14 mm rain
- Sidi Bel Abbes in SeptemberAlgeria · 105 kmHigh 29.3°C · Low 17.4°C · 19 mm rain
- Chlef in SeptemberAlgeria · 115 kmHigh 31.1°C · Low 18.9°C · 23 mm rain
- Saïda in SeptemberAlgeria · 123 kmHigh 29.0°C · Low 16.8°C · 31 mm rain
- Tiaret in SeptemberAlgeria · 127 kmHigh 26.9°C · Low 14.9°C · 30 mm rain
- Aïn Temouchent in SeptemberAlgeria · 132 kmHigh 28.7°C · Low 19.0°C · 16 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 Mostaganem) is explained once on the Mostaganem year overview and on the Sources, method and limits page.