Climate averages 1991–2020
Freetown weather
in September.
A warm, very wet month: the 10th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Freetown: daytime highs average 26.4°C and nights cool to about 23.9°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 479 mm of rain on roughly 29 days, which makes September a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 10 min on an average September day.
The nearest other city in this atlas is Conakry (127 km away). In September its highs average 27.3°C, 0.9°C warmer than Freetown, with 516 mm of rain.
Among the 5 cities listed in Sierra Leone, Freetown ranks 5th of 5 for the warmest September highs and 5th of 5 for the driest September (rainfall, lowest first). The mean September high of those 5 cities is 27.6°C; Freetown is 1.2°C cooler than that mean.
From September to October, average highs rise by 0.8°C to 27.2°C, and monthly rainfall falls from 479 mm to 232 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
Freetown climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.7°C25.4°C | 25.4°C | 9.9 | 2.3 | 11.712 h |
| February | 27.5°C25.4°C | 25.4°C | 6.0 | 1.4 | 11.912 h |
| March | 27.5°C25.6°C | 25.6°C | 8.7 | 2.4 | 12.112 h |
| April | 27.7°C25.9°C | 25.9°C | 21 | 5.2 | 12.312 h |
| May | 27.9°C25.6°C | 25.6°C | 159 | 21.4 | 12.513 h |
| June | 27.2°C24.5°C | 24.5°C | 397 | 29.1 | 12.613 h |
| July | 26.2°C23.9°C | 23.9°C | 683 | 30.2 | 12.613 h |
| August | 25.9°C23.9°C | 23.9°C | 751 | 29.9 | 12.412 h |
| September, selected | 26.4°C23.9°C | 23.9°C | 479 | 28.6 | 12.212 h |
| October | 27.2°C24.3°C | 24.3°C | 232 | 28.1 | 11.912 h |
| November | 27.8°C25.1°C | 25.1°C | 98 | 20.6 | 11.712 h |
| December | 28.1°C25.9°C | 25.9°C | 27 | 7.4 | 11.612 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
- Conakry in SeptemberGuinea · 127 kmHigh 27.3°C · Low 23.9°C · 516 mm rain
- Makeni in SeptemberSierra Leone · 138 kmHigh 28.4°C · Low 22.4°C · 413 mm rain
- Manéah in SeptemberGuinea · 140 kmHigh 28.0°C · Low 23.0°C · 465 mm rain
- Dubréka in SeptemberGuinea · 148 kmHigh 28.4°C · Low 23.2°C · 465 mm rain
- Bo in SeptemberSierra Leone · 175 kmHigh 28.1°C · Low 21.9°C · 433 mm rain
- Kindia in SeptemberGuinea · 179 kmHigh 27.8°C · Low 21.4°C · 326 mm rain
- Kenema in SeptemberSierra Leone · 235 kmHigh 27.9°C · Low 22.0°C · 395 mm rain
- Mamou in SeptemberGuinea · 245 kmHigh 26.8°C · Low 20.0°C · 334 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 Freetown) is explained once on the Freetown year overview and on the Sources, method and limits page.