Climate averages 1991–2020
Grand-Bassam weather
in September.
A warm, moderately wet month: the joint 10th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Grand-Bassam: daytime highs average 25.6°C and nights cool to about 23.6°C. By daytime temperature it is the joint 10th warmest of the 12 months.
Expect about 88 mm of rain on roughly 18 days, which makes September a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 09 min on an average September day.
The nearest other city in this atlas is Bingerville (23 km away). In September its highs average 27.0°C, 1.4°C warmer than Grand-Bassam, with 87 mm of rain.
Among the 30 cities listed in Ivory Coast, Grand-Bassam ranks 30th of 30 for the warmest September highs and 5th of 30 for the driest September (rainfall, lowest first). The mean September high of those 30 cities is 28.3°C; Grand-Bassam is 2.7°C cooler than that mean.
From September to October, average highs rise by 1.1°C to 26.7°C, and monthly rainfall rises from 88 mm to 107 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
Grand-Bassam climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.1°C25.5°C | 25.5°C | 47 | 13.7 | 11.912 h |
| February | 28.3°C25.9°C | 25.9°C | 55 | 16.5 | 12.012 h |
| March | 28.6°C26.1°C | 26.1°C | 78 | 20.2 | 12.112 h |
| April | 28.6°C25.9°C | 25.9°C | 103 | 21.9 | 12.212 h |
| May | 27.9°C25.3°C | 25.3°C | 206 | 27.9 | 12.412 h |
| June | 26.6°C24.4°C | 24.4°C | 250 | 27.3 | 12.412 h |
| July | 25.6°C23.8°C | 23.8°C | 129 | 19.8 | 12.412 h |
| August | 25.1°C23.3°C | 23.3°C | 64 | 14.3 | 12.312 h |
| September, selected | 25.6°C23.6°C | 23.6°C | 88 | 18.3 | 12.112 h |
| October | 26.7°C24.3°C | 24.3°C | 107 | 24.2 | 12.012 h |
| November | 27.8°C25.0°C | 25.0°C | 93 | 24.2 | 11.912 h |
| December | 28.1°C25.6°C | 25.6°C | 63 | 18.9 | 11.812 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
- Bingerville in SeptemberIvory Coast · 23 kmHigh 27.0°C · Low 22.8°C · 87 mm rain
- Koumassi in SeptemberIvory Coast · 27 kmHigh 26.4°C · Low 23.4°C · 87 mm rain
- Abidjan in SeptemberIvory Coast · 33 kmHigh 27.1°C · Low 22.8°C · 87 mm rain
- Anyama in SeptemberIvory Coast · 47 kmHigh 27.7°C · Low 22.3°C · 155 mm rain
- Dabou in SeptemberIvory Coast · 72 kmHigh 26.5°C · Low 23.1°C · 78 mm rain
- Agboville in SeptemberIvory Coast · 95 kmHigh 29.2°C · Low 22.6°C · 146 mm rain
- Adzopé in SeptemberIvory Coast · 100 kmHigh 28.8°C · Low 22.4°C · 153 mm rain
- Abengourou in SeptemberIvory Coast · 171 kmHigh 28.9°C · Low 22.2°C · 126 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 Grand-Bassam) is explained once on the Grand-Bassam year overview and on the Sources, method and limits page.