Byumba climate — normals and trends
Byumba (Rwanda) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 17.5 °C and it receives 1,657 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 August (18.3 °C on average) and the coldest is November (17.0 °C). Rainfall peaks in April.
Byumba averages 0 frost days, 0 hot days (≥ 30 °C) and 212 rainy days per year.
Byumba has warmed by +1.6 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The hottest day of the period reached 29.2 °C (on 23 February 2005) and the coldest 9.4 °C (on 5 October 1967).
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
ByumbaNorthern Province
- coords
- -1.58°, 30.07°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.5°C
Average daily high
22.3°C
Average daily low
13.6°C
Annual rainfall
1,657mm
Sunshine / day
10.6h
Mean relative humidity
76%
Average peak wind
11.8km/h
Seasonal range
1.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
212 d/yr
Annual snowfall
0.0 cm
Average feels-like high
23.1 °C
Average feels-like low
13.5 °C
Average peak gust
32.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
18.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.56 · 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
29.2 °C
23 February 2005
Coldest day
9.4 °C
5 October 1967
Wettest day
77 mm
25 April 1968
Windiest day
22.0 km/h
8 August 1950
Strongest gust
55.1 km/h
8 August 1950
Hottest feels-like
30.3 °C
3 March 2020
Coldest feels-like
7.5 °C
6 July 1953
Sunniest day
12.0 h
2 January 1940
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 23.6 °C | +1.1 °C | 77 mm | -62 mm |
| Feb | 24.7 °C | +1.8 °C | 75 mm | -89 mm |
| Mar | 23.6 °C | +1.1 °C | 180 mm | -50 mm |
| Apr | 22.6 °C | +0.7 °C | 226 mm | -15 mm |
| May | 21.9 °C | +0.4 °C | 177 mm | +17 mm |
| Jun | 22.0 °C | +0.1 °C | 69 mm | +39 mm |
| Jul | 22.6 °C | -0.1 °C | 9 mm | -2 mm |
| Aug | 22.8 °C | -0.5 °C | 59 mm | +16 mm |
| Sep | 23.8 °C | +0.9 °C | 44 mm | -59 mm |
| Oct | 22.5 °C | +0.2 °C | 220 mm | +56 mm |
| Nov | 22.5 °C | +0.8 °C | 93 mm | -112 mm |
| Dec | 22.0 °C | +0.2 °C | 99 mm | -69 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 Byumba?
Byumba has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 17.5 °C and it receives 1,657 mm of precipitation per year.
What is the hottest day ever recorded in Byumba?
The hottest day measured in Byumba between 1940 and 2025 was 23 February 2005, reaching 29.2 °C.
What is the coldest day in Byumba?
The coldest day measured in Byumba between 1940 and 2025 was 5 October 1967, at 9.4 °C.
Does it snow in Byumba?
Almost never: Byumba sees virtually no snow, with about 0 frost days per year.
Has the climate of Byumba warmed?
Yes: Byumba warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Byumba?
The wettest day measured in Byumba between 1940 and 2025 was 25 April 1968, with 77 mm of rain in 24 hours.
What was the windiest day in Byumba?
The windiest day measured in Byumba between 1940 and 2025 was 8 August 1950, with winds reaching 22.0 km/h.
What is the warmest month in Byumba?
The warmest month in Byumba is August (18.3 °C on average); the coldest is November (17.0 °C).
How much does it rain in Byumba?
Byumba receives on average 1,657 mm of precipitation per year, spread over about 212 rainy days.
Is it sunny in Byumba?
Byumba gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
Are there tropical nights in Byumba?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Byumba.
What was the most extreme apparent temperature in Byumba?
In Byumba, between 1940 and 2025, the highest apparent temperature reached 30.3 °C on 3 March 2020, and the lowest was 7.5 °C on 6 July 1953.
Compare Byumba with another city
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Nearby cities
The climate around Byumba