Climate averages 1991–2020
Bo weather
in August.
A warm, very wet month: the coolest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Bo: daytime highs average 27.2°C and nights cool to about 21.8°C. By daytime temperature it is the coolest month of the year.
Expect about 476 mm of rain on roughly 29 days, which makes August a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 23 min on an average August day.
The nearest other city in this atlas is Kenema (61 km away). In August its highs average 27.1°C, about as warm as Bo, with 413 mm of rain.
Among the 5 cities listed in Sierra Leone, Bo ranks 2nd of 5 for the warmest August highs and 4th of 5 for the driest August (rainfall, lowest first). The mean August high of those 5 cities is 26.8°C; Bo is 0.4°C warmer than that mean.
From August to September, average highs rise by 0.8°C to 28.1°C, and monthly rainfall falls from 476 mm to 433 mm.
The annual picture
August 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
Bo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 33.1°C21.9°C | 21.9°C | 17 | 3.7 | 11.712 h |
| February | 34.3°C22.9°C | 22.9°C | 20 | 4.7 | 11.912 h |
| March | 33.9°C23.6°C | 23.6°C | 56 | 11.4 | 12.112 h |
| April | 32.2°C23.6°C | 23.6°C | 120 | 18.0 | 12.312 h |
| May | 30.4°C23.2°C | 23.2°C | 246 | 27.0 | 12.512 h |
| June | 29.0°C22.4°C | 22.4°C | 333 | 28.9 | 12.613 h |
| July | 27.7°C21.9°C | 21.9°C | 396 | 29.1 | 12.513 h |
| August, selected | 27.2°C21.8°C | 21.8°C | 476 | 29.4 | 12.412 h |
| September | 28.1°C21.9°C | 21.9°C | 433 | 29.3 | 12.212 h |
| October | 28.8°C22.1°C | 22.1°C | 245 | 29.2 | 12.012 h |
| November | 29.4°C22.3°C | 22.3°C | 103 | 19.3 | 11.812 h |
| December | 30.8°C22.2°C | 22.2°C | 26 | 6.4 | 11.712 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
August in nearby cities
- Kenema in AugustSierra Leone · 61 kmHigh 27.1°C · Low 21.7°C · 413 mm rain
- Makeni in AugustSierra Leone · 108 kmHigh 27.4°C · Low 22.2°C · 469 mm rain
- Koidu in AugustSierra Leone · 113 kmHigh 26.3°C · Low 21.1°C · 419 mm rain
- Freetown in AugustSierra Leone · 175 kmHigh 25.9°C · Low 23.9°C · 751 mm rain
- Gueckedou in AugustGuinea · 189 kmHigh 26.4°C · Low 21.0°C · 330 mm rain
- Monrovia in AugustLiberia · 212 kmHigh 26.3°C · Low 23.0°C · 492 mm rain
- Kissidougou in AugustGuinea · 226 kmHigh 26.6°C · Low 20.6°C · 285 mm rain
- Faranah in AugustGuinea · 255 kmHigh 27.5°C · Low 21.4°C · 283 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 Bo) is explained once on the Bo year overview and on the Sources, method and limits page.