Boma climate — normals and trends
Boma (Democratic Republic of Congo) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 24.5 °C and it receives 945 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is March (26.3 °C on average) and the coldest is July (21.3 °C). Rainfall peaks in April.
Boma averages 0 frost days, 126 hot days (≥ 30 °C) and 140 rainy days per year.
Boma has warmed by +1.4 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.9 °C (on 9 March 1941) and the coldest 10.4 °C (on 17 July 1950).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
BomaBas-Congo Province
- coords
- -5.85°, 13.05°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.5°C
Average daily high
28.9°C
Average daily low
21.4°C
Annual rainfall
945mm
Sunshine / day
8.0h
Mean relative humidity
83%
Average peak wind
10.2km/h
Seasonal range
5.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
126 d/yr
Rainy days (≥ 1 mm)
140 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.1 °C
Average feels-like low
25.0 °C
Average peak gust
24.9 km/h
Tropical nights (≥ 20 °C)
265 d/yr
Solar radiation
15.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.60 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
36.9 °C
9 March 1941
Coldest day
10.4 °C
17 July 1950
Wettest day
184 mm
19 April 2021
Windiest day
20.7 km/h
4 November 1956
Strongest gust
47.5 km/h
4 November 1956
Hottest feels-like
44.3 °C
17 March 2024
Coldest feels-like
9.3 °C
17 July 1950
Sunniest day
12.1 h
26 January 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 30.3 °C | +0.3 °C | 246 mm | +106 mm |
| Feb | 31.3 °C | +0.8 °C | 174 mm | +50 mm |
| Mar | 31.1 °C | +0.3 °C | 128 mm | -9 mm |
| Apr | 31.5 °C | +1.1 °C | 79 mm | -80 mm |
| May | 30.5 °C | +1.3 °C | 117 mm | +50 mm |
| Jun | 27.9 °C | +0.7 °C | 18 mm | +14 mm |
| Jul | 25.0 °C | -1.3 °C | 5 mm | +3 mm |
| Aug | 25.5 °C | -0.9 °C | 5 mm | 0 mm |
| Sep | 27.1 °C | -0.4 °C | 14 mm | +2 mm |
| Oct | 29.5 °C | +0.4 °C | 30 mm | -11 mm |
| Nov | 30.7 °C | +0.8 °C | 130 mm | +13 mm |
| Dec | 30.0 °C | +0.3 °C | 180 mm | +40 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Boma?
Boma has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.5 °C and it receives 945 mm of precipitation per year.
What is the hottest day ever recorded in Boma?
The hottest day measured in Boma between 1940 and 2025 was 9 March 1941, reaching 36.9 °C.
What is the coldest day in Boma?
The coldest day measured in Boma between 1940 and 2025 was 17 July 1950, at 10.4 °C.
Does it snow in Boma?
Almost never: Boma sees virtually no snow, with about 0 frost days per year.
Has the climate of Boma warmed?
Yes: Boma warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Boma?
The wettest day measured in Boma between 1940 and 2025 was 19 April 2021, with 184 mm of rain in 24 hours.
What was the windiest day in Boma?
The windiest day measured in Boma between 1940 and 2025 was 4 November 1956, with winds reaching 20.7 km/h.
What is the warmest month in Boma?
The warmest month in Boma is March (26.3 °C on average); the coldest is July (21.3 °C).
How much does it rain in Boma?
Boma receives on average 945 mm of precipitation per year, spread over about 140 rainy days.
Is it sunny in Boma?
Boma gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.
Are there tropical nights in Boma?
Yes: Boma has on average 265 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Boma?
In Boma, between 1940 and 2025, the highest apparent temperature reached 44.3 °C on 17 March 2024, and the lowest was 9.3 °C on 17 July 1950.
Compare Boma with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Boma