Climate averages 1991–2020
Monrovia weather
in September.
A warm, very wet month: the 10th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Monrovia: daytime highs average 27.1°C and nights cool to about 22.9°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 530 mm of rain on roughly 29 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 09 min on an average September day.
The nearest other city in this atlas is Buchanan (95 km away). In September its highs average 26.7°C, about as warm as Monrovia, with 403 mm of rain.
Among the 3 cities listed in Liberia, Monrovia ranks 2nd of 3 for the warmest September highs and 3rd of 3 for the driest September (rainfall, lowest first). The mean September high of those 3 cities is 27.2°C; Monrovia is 0.1°C cooler than that mean.
From September to October, average highs rise by 1.0°C to 28.1°C, and monthly rainfall falls from 530 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
Monrovia climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.3°C23.8°C | 23.8°C | 83 | 17.5 | 11.812 h |
| February | 29.3°C24.4°C | 24.4°C | 103 | 20.3 | 11.912 h |
| March | 29.4°C24.6°C | 24.6°C | 161 | 25.0 | 12.112 h |
| April | 29.4°C24.6°C | 24.6°C | 208 | 26.3 | 12.312 h |
| May | 28.9°C24.0°C | 24.0°C | 321 | 29.9 | 12.412 h |
| June | 27.6°C23.2°C | 23.2°C | 492 | 29.0 | 12.512 h |
| July | 26.5°C23.1°C | 23.1°C | 419 | 26.8 | 12.412 h |
| August | 26.3°C23.0°C | 23.0°C | 492 | 27.2 | 12.312 h |
| September, selected | 27.1°C22.9°C | 22.9°C | 530 | 29.3 | 12.212 h |
| October | 28.1°C23.0°C | 23.0°C | 358 | 30.4 | 12.012 h |
| November | 28.7°C23.4°C | 23.4°C | 192 | 27.6 | 11.812 h |
| December | 28.9°C23.7°C | 23.7°C | 105 | 23.0 | 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
- Buchanan in SeptemberLiberia · 95 kmHigh 26.7°C · Low 23.3°C · 403 mm rain
- Gbarnga in SeptemberLiberia · 166 kmHigh 27.7°C · Low 21.9°C · 309 mm rain
- Kenema in SeptemberSierra Leone · 181 kmHigh 27.9°C · Low 22.0°C · 395 mm rain
- Bo in SeptemberSierra Leone · 212 kmHigh 28.1°C · Low 21.9°C · 433 mm rain
- Koidu in SeptemberSierra Leone · 261 kmHigh 27.3°C · Low 21.4°C · 422 mm rain
- Gueckedou in SeptemberGuinea · 262 kmHigh 27.5°C · Low 21.2°C · 351 mm rain
- Nzérékoré in SeptemberGuinea · 272 kmHigh 27.1°C · Low 20.8°C · 268 mm rain
- Danané in SeptemberIvory Coast · 311 kmHigh 27.4°C · Low 21.4°C · 257 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 Monrovia) is explained once on the Monrovia year overview and on the Sources, method and limits page.