Byumba, Rwanda climate

Cwb Subtropical highland (dry winter)

Byumba has a remarkably steady mild-temperate climate (Subtropical highland (dry winter), Köppen Cwb). The hottest month is February with an average daily high near 25°C, while the coldest is July averaging around 11°C at night. Precipitation totals about 1489 mm a year and is strongly seasonal — April alone averages 222 mm while July barely receives 12 mm.

☀️ Summers

Mild

Highs near 25°C in February.

❄️ Winters

Mild

Lows near 11°C in July.

🌧️ Rain

Wet

About 1489 mm of rain a year.

Wettest in April

⛅ Sky & trend

Often grey

Overcast skies dominate much of the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Byumba climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	24	25	24	23	22	22	23	24	24	24	23	23
Avg temp (°C)	19	19	19	18	18	17	17	18	19	18	18	18
Avg low (°C)	13	14	14	13	13	12	11	12	13	13	13	13
Precipitation (mm)	110	122	191	222	153	32	12	52	99	171	186	137

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	24	25	24	23	22	22
Avg temp (°C)	19	19	19	18	18	17
Avg low (°C)	13	14	14	13	13	12
Precipitation (mm)	110	122	191	222	153	32

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	23	24	24	24	23	23
Avg temp (°C)	17	18	19	18	18	18
Avg low (°C)	11	12	13	13	13	13
Precipitation (mm)	12	52	99	171	186	137

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	75	77	81	83	75	61	57	67	74	81	82	77
Relative humidity (%)	76	73	77	83	85	78	72	71	73	77	80	79
Wind speed (mph)	1.5	1.7	1.6	1.6	1.6	1.7	1.9	2.2	2.2	1.9	1.6	1.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	75	77	81	83	75	61
Relative humidity (%)	76	73	77	83	85	78
Wind speed (mph)	1.5	1.7	1.6	1.6	1.6	1.7

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	57	67	74	81	82	77
Relative humidity (%)	72	71	73	77	80	79
Wind speed (mph)	1.9	2.2	2.2	1.9	1.6	1.5

Methodology & sources

Temperature & precipitation — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →