Climate averages 1991–2020
Bissau weather
in May.
A hot, very dry month: the 4th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Bissau: daytime highs average 33.8°C and nights cool to about 24.2°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 6.1 mm of rain on roughly 1 day, which makes May a very dry month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 40 min on an average May day.
The nearest other city in this atlas is Ziguinchor (107 km away). In May its highs average 36.0°C, 2.2°C warmer than Bissau, with 2.0 mm of rain.
From May to June, average highs fall by 2.1°C to 31.7°C, and monthly rainfall rises from 6.1 mm to 87 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Ziguinchor in MaySenegal · 107 kmHigh 36.0°C · Low 22.6°C · 2.0 mm rain
- Kolda in MaySenegal · 135 kmHigh 38.6°C · Low 24.6°C · 3.0 mm rain
- Kamsar in MayGuinea · 172 kmHigh 30.8°C · Low 25.1°C · 34 mm rain
- Brikama in MayGambia · 194 kmHigh 30.7°C · Low 22.2°C · 0.9 mm rain
- Banjul in MayGambia · 206 kmHigh 29.6°C · Low 22.3°C · 0.9 mm rain
- Serekunda in MayGambia · 211 kmHigh 28.1°C · Low 22.2°C · 0.8 mm rain
- Kaolack in MaySenegal · 260 kmHigh 37.0°C · Low 21.6°C · 0.4 mm rain
- Tambacounda in MaySenegal · 298 kmHigh 40.9°C · Low 26.8°C · 3.5 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.