Climate averages 1991–2020
Libreville weather
in September.
A warm, wet month: the 9th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Libreville: daytime highs average 27.6°C and nights cool to about 23.4°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 151 mm of rain on roughly 21 days, which makes September a wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 07 min on an average September day.
The nearest other city in this atlas is Owendo (13 km away). In September its highs average 28.3°C, 0.7°C warmer than Libreville, with 123 mm of rain.
Among the 6 cities listed in Gabon, Libreville ranks 4th of 6 for the warmest September highs and 5th of 6 for the driest September (rainfall, lowest first). The mean September high of those 6 cities is 28.3°C; Libreville is 0.6°C cooler than that mean.
From September to October, average highs rise by 0.1°C to 27.7°C, and monthly rainfall rises from 151 mm to 358 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
Libreville climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.6°C23.9°C | 23.9°C | 250 | 29.1 | 12.112 h |
| February | 29.0°C24.3°C | 24.3°C | 218 | 25.9 | 12.112 h |
| March | 29.4°C24.5°C | 24.5°C | 270 | 28.8 | 12.112 h |
| April | 29.3°C24.6°C | 24.6°C | 261 | 27.4 | 12.112 h |
| May | 28.8°C24.4°C | 24.4°C | 244 | 26.6 | 12.112 h |
| June | 27.5°C23.3°C | 23.3°C | 82 | 12.4 | 12.112 h |
| July | 27.1°C22.5°C | 22.5°C | 33 | 6.8 | 12.112 h |
| August | 27.4°C22.8°C | 22.8°C | 35 | 8.2 | 12.112 h |
| September, selected | 27.6°C23.4°C | 23.4°C | 151 | 21.4 | 12.112 h |
| October | 27.7°C23.6°C | 23.6°C | 358 | 30.2 | 12.112 h |
| November | 28.2°C23.6°C | 23.6°C | 393 | 29.6 | 12.112 h |
| December | 28.4°C23.7°C | 23.7°C | 316 | 30.2 | 12.112 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
- Owendo in SeptemberGabon · 13 kmHigh 28.3°C · Low 23.1°C · 123 mm rain
- Port-Gentil in SeptemberGabon · 144 kmHigh 27.3°C · Low 23.6°C · 34 mm rain
- Bata in SeptemberEquatorial Guinea · 167 kmHigh 27.1°C · Low 22.9°C · 245 mm rain
- Ciudad de la Paz in SeptemberEquatorial Guinea · 203 kmHigh 26.9°C · Low 20.1°C · 266 mm rain
- Oyem in SeptemberGabon · 272 kmHigh 27.5°C · Low 20.1°C · 223 mm rain
- Kribi in SeptemberCameroon · 287 kmHigh 26.2°C · Low 23.3°C · 335 mm rain
- São Tomé in SeptemberSao Tome and Principe · 303 kmHigh 25.5°C · Low 23.8°C · 46 mm rain
- Ébolowa in SeptemberCameroon · 337 kmHigh 27.0°C · Low 20.5°C · 241 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 Libreville) is explained once on the Libreville year overview and on the Sources, method and limits page.