Climate averages 1991–2020
Chlef weather
in September.
A hot, fairly dry month: the 4th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Chlef: daytime highs average 31.1°C and nights cool to about 18.9°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 23 mm of rain on roughly 4 days, which makes September a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 27 min on an average September day.
The nearest other city in this atlas is Khemis Miliana (80 km away). In September its highs average 30.3°C, 0.7°C cooler than Chlef, with 31 mm of rain.
Among the 55 cities listed in Algeria, Chlef ranks 10th of 55 for the warmest September highs and joint 17th of 55 for the driest September (rainfall, lowest first). The mean September high of those 55 cities is 29.2°C; Chlef is 1.8°C warmer than that mean.
From September to October, average highs fall by 4.7°C to 26.3°C, and monthly rainfall rises from 23 mm to 37 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
Chlef climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 15.5°C5.5°C | 5.5°C | 55 | 8.8 | 10.010 h |
| February | 16.6°C6.0°C | 6.0°C | 52 | 8.4 | 10.811 h |
| March | 19.7°C8.2°C | 8.2°C | 52 | 8.0 | 11.912 h |
| April | 22.4°C10.5°C | 10.5°C | 50 | 8.2 | 13.113 h |
| May | 26.6°C13.9°C | 13.9°C | 35 | 5.4 | 14.114 h |
| June | 31.9°C18.0°C | 18.0°C | 7.0 | 1.5 | 14.615 h |
| July | 36.1°C21.4°C | 21.4°C | 1.2 | 0.3 | 14.414 h |
| August | 36.2°C22.0°C | 22.0°C | 6.4 | 1.1 | 13.514 h |
| September, selected | 31.1°C18.9°C | 18.9°C | 23 | 4.2 | 12.412 h |
| October | 26.3°C14.9°C | 14.9°C | 37 | 6.1 | 11.311 h |
| November | 19.8°C10.2°C | 10.2°C | 64 | 9.4 | 10.310 h |
| December | 16.4°C7.1°C | 7.1°C | 49 | 8.0 | 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
- Khemis Miliana in SeptemberAlgeria · 80 kmHigh 30.3°C · Low 18.3°C · 31 mm rain
- Relizane in SeptemberAlgeria · 85 kmHigh 31.6°C · Low 18.5°C · 18 mm rain
- Tiaret in SeptemberAlgeria · 88 kmHigh 26.9°C · Low 14.9°C · 30 mm rain
- Sougueur in SeptemberAlgeria · 110 kmHigh 26.8°C · Low 15.3°C · 33 mm rain
- Mostaganem in SeptemberAlgeria · 115 kmHigh 28.8°C · Low 20.1°C · 14 mm rain
- Médéa in SeptemberAlgeria · 128 kmHigh 26.9°C · Low 15.2°C · 32 mm rain
- Mascara in SeptemberAlgeria · 138 kmHigh 29.1°C · Low 16.5°C · 23 mm rain
- Blida in SeptemberAlgeria · 138 kmHigh 28.2°C · Low 18.3°C · 32 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 Chlef) is explained once on the Chlef year overview and on the Sources, method and limits page.