Climate averages 1991–2020
Banjul weather
in September.
A hot, very wet month: the 11th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Banjul: daytime highs average 29.2°C and nights cool to about 25.4°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 190 mm of rain on roughly 20 days, which makes September a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 13 min on an average September day.
The nearest other city in this atlas is Serekunda (11 km away). In September its highs average 28.8°C, about as warm as Banjul, with 174 mm of rain.
Among the 3 cities listed in the Gambia, Banjul ranks 2nd of 3 for the warmest September highs and 2nd of 3 for the driest September (rainfall, lowest first). The mean September high of those 3 cities is 29.1°C; Banjul is 0.1°C warmer than that mean.
From September to October, average highs rise by 1.0°C to 30.2°C, and monthly rainfall falls from 190 mm to 56 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
Banjul climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.0°C20.0°C | 20.0°C | 1.6 | 0.2 | 11.411 h |
| February | 31.1°C20.5°C | 20.5°C | 0.9 | 0.1 | 11.712 h |
| March | 31.5°C20.9°C | 20.9°C | 0.2 | 0.1 | 12.012 h |
| April | 30.3°C21.1°C | 21.1°C | 0 | 0.0 | 12.412 h |
| May | 29.6°C22.3°C | 22.3°C | 0.9 | 0.2 | 12.713 h |
| June | 29.9°C24.6°C | 24.6°C | 12 | 2.1 | 12.913 h |
| July | 29.3°C25.4°C | 25.4°C | 130 | 14.7 | 12.813 h |
| August | 28.7°C25.2°C | 25.2°C | 254 | 23.4 | 12.613 h |
| September, selected | 29.2°C25.4°C | 25.4°C | 190 | 20.2 | 12.212 h |
| October | 30.2°C26.1°C | 26.1°C | 56 | 8.3 | 11.812 h |
| November | 31.3°C24.4°C | 24.4°C | 1.8 | 0.5 | 11.512 h |
| December | 30.6°C21.6°C | 21.6°C | 1.5 | 0.2 | 11.311 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
- Serekunda in SeptemberGambia · 11 kmHigh 28.8°C · Low 25.5°C · 174 mm rain
- Brikama in SeptemberGambia · 22 kmHigh 29.3°C · Low 25.0°C · 196 mm rain
- Kaolack in SeptemberSenegal · 95 kmHigh 31.1°C · Low 24.1°C · 147 mm rain
- Ziguinchor in SeptemberSenegal · 104 kmHigh 30.1°C · Low 23.8°C · 307 mm rain
- Mbour in SeptemberSenegal · 116 kmHigh 29.8°C · Low 25.0°C · 111 mm rain
- Diourbel in SeptemberSenegal · 138 kmHigh 31.5°C · Low 23.9°C · 124 mm rain
- Thiès in SeptemberSenegal · 153 kmHigh 30.8°C · Low 24.0°C · 120 mm rain
- Thiès Nones in SeptemberSenegal · 154 kmHigh 30.3°C · Low 24.4°C · 120 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 Banjul) is explained once on the Banjul year overview and on the Sources, method and limits page.