Climate averages 1991–2020
São Tomé weather
in December.
A warm, wet month: the 6th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in São Tomé: daytime highs average 26.5°C and nights cool to about 24.6°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 174 mm of rain on roughly 26 days, which makes December a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 06 min on an average December day.
The nearest other city in this atlas is Port-Gentil (257 km away). In December its highs average 28.1°C, 1.6°C warmer than São Tomé, with 262 mm of rain.
From December to January, average highs rise by 0.4°C to 26.9°C, and monthly rainfall falls from 174 mm to 135 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
São Tomé climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.9°C24.9°C | 24.9°C | 135 | 23.6 | 12.112 h |
| February | 27.5°C25.4°C | 25.4°C | 115 | 19.4 | 12.112 h |
| March | 27.8°C25.7°C | 25.7°C | 133 | 20.5 | 12.112 h |
| April | 27.6°C25.7°C | 25.7°C | 130 | 18.7 | 12.112 h |
| May | 26.8°C25.2°C | 25.2°C | 119 | 17.0 | 12.112 h |
| June | 25.5°C24.1°C | 24.1°C | 23 | 4.0 | 12.112 h |
| July | 24.9°C23.3°C | 23.3°C | 7.7 | 2.0 | 12.112 h |
| August | 25.0°C23.3°C | 23.3°C | 14 | 2.6 | 12.112 h |
| September | 25.5°C23.8°C | 23.8°C | 46 | 7.8 | 12.112 h |
| October | 25.8°C24.2°C | 24.2°C | 152 | 21.5 | 12.112 h |
| November | 26.1°C24.4°C | 24.4°C | 210 | 25.7 | 12.112 h |
| December, selected | 26.5°C24.6°C | 24.6°C | 174 | 26.1 | 12.112 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
- Port-Gentil in DecemberGabon · 257 kmHigh 28.1°C · Low 23.9°C · 262 mm rain
- Libreville in DecemberGabon · 303 kmHigh 28.4°C · Low 23.7°C · 316 mm rain
- Owendo in DecemberGabon · 309 kmHigh 28.9°C · Low 23.2°C · 310 mm rain
- Bata in DecemberEquatorial Guinea · 378 kmHigh 28.3°C · Low 23.4°C · 213 mm rain
- Malabo in DecemberEquatorial Guinea · 443 kmHigh 28.2°C · Low 25.8°C · 62 mm rain
- Kribi in DecemberCameroon · 456 kmHigh 27.7°C · Low 24.4°C · 136 mm rain
- Ciudad de la Paz in DecemberEquatorial Guinea · 476 kmHigh 27.8°C · Low 20.0°C · 172 mm rain
- Ogbia in DecemberNigeria · 486 kmHigh 30.7°C · Low 23.8°C · 86 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 São Tomé) is explained once on the São Tomé year overview and on the Sources, method and limits page.