Climate averages 1991–2020
Boma weather
in December.
A hot, very wet month: the 6th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Boma: daytime highs average 29.8°C and nights cool to about 23.5°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 187 mm of rain on roughly 23 days, which makes December a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 27 min on an average December day.
The nearest other city in this atlas is Matadi (45 km away). In December its highs average 29.4°C, about as warm as Boma, with 175 mm of rain.
Among the 60 cities listed in the Democratic Republic of the Congo, Boma ranks 12th of 60 for the warmest December highs and 37th of 60 for the driest December (rainfall, lowest first). The mean December high of those 60 cities is 28.1°C; Boma is 1.7°C warmer than that mean.
From December to January, average highs rise by 0.3°C to 30.1°C, and monthly rainfall falls from 187 mm to 176 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
Boma climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.1°C23.5°C | 23.5°C | 176 | 21.9 | 12.412 h |
| February | 30.5°C23.9°C | 23.9°C | 146 | 19.3 | 12.312 h |
| March | 30.8°C24.2°C | 24.2°C | 147 | 20.4 | 12.112 h |
| April | 30.3°C24.2°C | 24.2°C | 184 | 22.1 | 12.012 h |
| May | 29.5°C23.3°C | 23.3°C | 63 | 11.6 | 11.912 h |
| June | 28.0°C20.4°C | 20.4°C | 3.1 | 0.4 | 11.812 h |
| July | 27.4°C18.8°C | 18.8°C | 2.2 | 0.1 | 11.812 h |
| August | 27.2°C19.2°C | 19.2°C | 5.5 | 0.8 | 11.912 h |
| September | 28.2°C20.8°C | 20.8°C | 12 | 2.6 | 12.112 h |
| October | 29.7°C22.7°C | 22.7°C | 52 | 10.4 | 12.212 h |
| November | 30.1°C23.5°C | 23.5°C | 155 | 22.0 | 12.412 h |
| December, selected | 29.8°C23.5°C | 23.5°C | 187 | 23.4 | 12.512 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
- Matadi in DecemberDemocratic Republic of the Congo · 45 kmHigh 29.4°C · Low 22.8°C · 175 mm rain
- Moanda, Democratic Republic of the Congo in DecemberDemocratic Republic of the Congo · 76 kmHigh 27.9°C · Low 23.9°C · 81 mm rain
- Soyo in DecemberAngola · 82 kmHigh 27.2°C · Low 24.9°C · 79 mm rain
- Cabinda in DecemberAngola · 100 kmHigh 27.7°C · Low 24.2°C · 198 mm rain
- Mbanza Kongo in DecemberAngola · 139 kmHigh 28.0°C · Low 20.6°C · 201 mm rain
- Kimpese in DecemberDemocratic Republic of the Congo · 156 kmHigh 29.4°C · Low 21.9°C · 180 mm rain
- Pointe-Noire in DecemberRepublic of the Congo · 178 kmHigh 28.0°C · Low 23.8°C · 135 mm rain
- Nkayi in DecemberRepublic of the Congo · 187 kmHigh 29.8°C · Low 22.5°C · 175 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 Boma) is explained once on the Boma year overview and on the Sources, method and limits page.