Climate averages 1991–2020
Bo weather
in April.
A hot, wet month: the 4th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a hot month in Bo: daytime highs average 32.2°C and nights cool to about 23.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 120 mm of rain on roughly 18 days, which makes April a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 18 min on an average April day.
The nearest other city in this atlas is Kenema (61 km away). In April its highs average 31.6°C, 0.6°C cooler than Bo, with 114 mm of rain.
Among the 5 cities listed in Sierra Leone, Bo ranks 2nd of 5 for the warmest April highs and 5th of 5 for the driest April (rainfall, lowest first). The mean April high of those 5 cities is 31.4°C; Bo is 0.8°C warmer than that mean.
From April to May, average highs fall by 1.8°C to 30.4°C, and monthly rainfall rises from 120 mm to 246 mm.
The annual picture
April 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, selected | 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 | 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
April in nearby cities
- Kenema in AprilSierra Leone · 61 kmHigh 31.6°C · Low 23.6°C · 114 mm rain
- Makeni in AprilSierra Leone · 108 kmHigh 34.3°C · Low 24.7°C · 51 mm rain
- Koidu in AprilSierra Leone · 113 kmHigh 31.3°C · Low 23.2°C · 105 mm rain
- Freetown in AprilSierra Leone · 175 kmHigh 27.7°C · Low 25.9°C · 21 mm rain
- Gueckedou in AprilGuinea · 189 kmHigh 30.7°C · Low 22.9°C · 122 mm rain
- Monrovia in AprilLiberia · 212 kmHigh 29.4°C · Low 24.6°C · 208 mm rain
- Kissidougou in AprilGuinea · 226 kmHigh 32.0°C · Low 22.8°C · 111 mm rain
- Faranah in AprilGuinea · 255 kmHigh 35.1°C · Low 24.2°C · 54 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.