Climate averages 1991–2020
Bo weather
in December.
A hot, fairly dry month: the 5th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Bo: daytime highs average 30.8°C and nights cool to about 22.2°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 26 mm of rain on roughly 6 days, which makes December a fairly dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 40 min on an average December day.
The nearest other city in this atlas is Kenema (61 km away). In December its highs average 30.4°C, about as warm as Bo, with 21 mm of rain.
Among the 5 cities listed in Sierra Leone, Bo ranks 2nd of 5 for the warmest December highs and 4th of 5 for the driest December (rainfall, lowest first). The mean December high of those 5 cities is 30.2°C; Bo is 0.6°C warmer than that mean.
From December to January, average highs rise by 2.2°C to 33.1°C, and monthly rainfall falls from 26 mm to 17 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Kenema in DecemberSierra Leone · 61 kmHigh 30.4°C · Low 22.2°C · 21 mm rain
- Makeni in DecemberSierra Leone · 108 kmHigh 32.0°C · Low 22.1°C · 13 mm rain
- Koidu in DecemberSierra Leone · 113 kmHigh 29.9°C · Low 20.6°C · 16 mm rain
- Freetown in DecemberSierra Leone · 175 kmHigh 28.1°C · Low 25.9°C · 27 mm rain
- Gueckedou in DecemberGuinea · 189 kmHigh 30.5°C · Low 20.2°C · 18 mm rain
- Monrovia in DecemberLiberia · 212 kmHigh 28.9°C · Low 23.7°C · 105 mm rain
- Kissidougou in DecemberGuinea · 226 kmHigh 31.4°C · Low 19.2°C · 8.2 mm rain
- Faranah in DecemberGuinea · 255 kmHigh 32.8°C · Low 19.8°C · 3.0 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.