Climate averages 1991–2020
Bissau weather
in December.
A hot, very dry month: the 6th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Bissau: daytime highs average 32.8°C and nights cool to about 21.6°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 1.9 mm of rain on fewer than one day, which makes December a very dry month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 27 min on an average December day.
The nearest other city in this atlas is Ziguinchor (107 km away). In December its highs average 33.5°C, 0.7°C warmer than Bissau, with 1.4 mm of rain.
From December to January, average highs rise by 0.2°C to 32.9°C, and monthly rainfall falls from 1.9 mm to under 1 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
Bissau climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 32.9°C20.5°C | 20.5°C | 0.3 | 0.1 | 11.512 h |
| February | 34.4°C21.2°C | 21.2°C | 0.8 | 0.1 | 11.712 h |
| March | 35.2°C22.4°C | 22.4°C | 0 | 0.0 | 12.112 h |
| April | 34.8°C23.2°C | 23.2°C | 0 | 0.0 | 12.412 h |
| May | 33.8°C24.2°C | 24.2°C | 6.1 | 1.3 | 12.713 h |
| June | 31.7°C25.3°C | 25.3°C | 87 | 12.0 | 12.813 h |
| July | 28.9°C24.6°C | 24.6°C | 352 | 27.8 | 12.713 h |
| August | 28.3°C24.3°C | 24.3°C | 452 | 29.3 | 12.513 h |
| September | 29.1°C24.4°C | 24.4°C | 307 | 27.7 | 12.212 h |
| October | 30.3°C25.0°C | 25.0°C | 142 | 21.9 | 11.912 h |
| November | 31.9°C24.3°C | 24.3°C | 23 | 4.6 | 11.612 h |
| December, selected | 32.8°C21.6°C | 21.6°C | 1.9 | 0.3 | 11.411 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
- Ziguinchor in DecemberSenegal · 107 kmHigh 33.5°C · Low 19.8°C · 1.4 mm rain
- Kolda in DecemberSenegal · 135 kmHigh 33.4°C · Low 19.7°C · 1.1 mm rain
- Kamsar in DecemberGuinea · 172 kmHigh 30.8°C · Low 22.8°C · 3.5 mm rain
- Brikama in DecemberGambia · 194 kmHigh 31.0°C · Low 21.3°C · 0.9 mm rain
- Banjul in DecemberGambia · 206 kmHigh 30.6°C · Low 21.6°C · 1.5 mm rain
- Serekunda in DecemberGambia · 211 kmHigh 29.4°C · Low 21.9°C · 0.9 mm rain
- Kaolack in DecemberSenegal · 260 kmHigh 32.8°C · Low 19.2°C · 2.1 mm rain
- Tambacounda in DecemberSenegal · 298 kmHigh 34.8°C · Low 20.8°C · 1.3 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 Bissau) is explained once on the Bissau year overview and on the Sources, method and limits page.