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Bo Weather by Month
Average temperatures, rainfall and humidity for Bo, Sierra Leone, month by month, built from OpenWeather's historical records. Use it to see what a typical Bo month looks like before you travel — then check the live Bo forecast for the days ahead.
Warmest month
February
37°C average high
Coolest month
January
21°C average low
Wettest month
July
353 mm of rain
Driest month
February
23 mm of rain
Average temperature and rainfall in Bo by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 35°C | 21°C | 17°C / 39°C | 55 mm | 66% | 5 km/h |
| February | 37°C | 22°C | 17°C / 42°C | 23 mm | 66% | 6 km/h |
| March | 36°C | 23°C | 20°C / 42°C | 51 mm | 68% | 6 km/h |
| April | 35°C | 24°C | 21°C / 43°C | 106 mm | 74% | 6 km/h |
| May | 33°C | 24°C | 21°C / 40°C | 161 mm | 84% | 5 km/h |
| June | 29°C | 23°C | 20°C / 34°C | 211 mm | 92% | 5 km/h |
| July | 27°C | 22°C | 20°C / 32°C | 353 mm | 95% | 5 km/h |
| August | 26°C | 22°C | 18°C / 32°C | 303 mm | 95% | 6 km/h |
| September | 27°C | 22°C | 20°C / 35°C | 272 mm | 95% | 5 km/h |
| October | 30°C | 22°C | 20°C / 35°C | 204 mm | 92% | 5 km/h |
| November | 31°C | 23°C | 20°C / 36°C | 148 mm | 85% | 4 km/h |
| December | 33°C | 22°C | 17°C / 38°C | 68 mm | 70% | 5 km/h |
Best time to visit Bo
The most comfortable time to visit Bo is generally December to February, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around July, totalling about 1955 mm a year.
Travellers who prefer heat should aim for February, when highs average 37°C. July is the month to avoid if rain would spoil your plans — it averages 353 mm, roughly 15× the rainfall of February.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Bo forecast for what is happening now.