Climate averages 1991–2020
Arlit weather
in September.
A very hot, very dry month: the 4th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a very hot month in Arlit: daytime highs average 40.0°C and nights cool to about 25.8°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 4.4 mm of rain on roughly 2 days, which makes September a very dry month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 16 min on an average September day.
The nearest other city in this atlas is Agadez (206 km away). In September its highs average 39.0°C, 1.0°C cooler than Arlit, with 4.5 mm of rain.
Among the 8 cities listed in Niger, Arlit ranks 1st of 8 for the warmest September highs and 1st of 8 for the driest September (rainfall, lowest first). The mean September high of those 8 cities is 35.6°C; Arlit is 4.3°C warmer than that mean.
From September to October, average highs fall by 2.4°C to 37.5°C, and monthly rainfall falls from 4.4 mm to under 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
Arlit climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.2°C10.8°C | 10.8°C | 0.1 | 0.0 | 11.111 h |
| February | 30.4°C13.5°C | 13.5°C | 0.1 | 0.0 | 11.512 h |
| March | 34.8°C17.8°C | 17.8°C | 0 | 0.0 | 12.012 h |
| April | 39.3°C22.5°C | 22.5°C | 0.2 | 0.0 | 12.613 h |
| May | 41.7°C26.3°C | 26.3°C | 1.0 | 0.4 | 13.013 h |
| June | 41.9°C27.7°C | 27.7°C | 2.0 | 0.7 | 13.213 h |
| July | 40.3°C27.4°C | 27.4°C | 5.4 | 1.8 | 13.113 h |
| August | 39.3°C26.8°C | 26.8°C | 16 | 4.4 | 12.813 h |
| September, selected | 40.0°C25.8°C | 25.8°C | 4.4 | 1.6 | 12.312 h |
| October | 37.5°C22.3°C | 22.3°C | 0.3 | 0.1 | 11.712 h |
| November | 32.5°C16.2°C | 16.2°C | 0 | 0.0 | 11.311 h |
| December | 28.4°C12.1°C | 12.1°C | 0.1 | 0.0 | 11.011 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
- Agadez in SeptemberNiger · 206 kmHigh 39.0°C · Low 25.4°C · 4.5 mm rain
- Tahoua in SeptemberNiger · 484 kmHigh 36.0°C · Low 24.2°C · 29 mm rain
- Tamanghasset in SeptemberAlgeria · 490 kmHigh 33.4°C · Low 20.7°C · 1.8 mm rain
- Zinder in SeptemberNiger · 574 kmHigh 34.5°C · Low 23.1°C · 39 mm rain
- Maradi in SeptemberNiger · 583 kmHigh 33.5°C · Low 23.6°C · 51 mm rain
- Birni N Konni in SeptemberNiger · 595 kmHigh 34.4°C · Low 24.7°C · 47 mm rain
- Katsina in SeptemberNigeria · 639 kmHigh 31.8°C · Low 22.5°C · 79 mm rain
- Sokoto in SeptemberNigeria · 671 kmHigh 32.6°C · Low 24.1°C · 68 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 Arlit) is explained once on the Arlit year overview and on the Sources, method and limits page.