Isiro, DR Congo climate

Am Tropical monsoon

Isiro has a remarkably steady warm-temperate climate (Tropical monsoon, Köppen Am). The hottest month is March with an average daily high near 29°C, while the coldest is July averaging around 19°C at night. Precipitation totals about 1797 mm a year and is strongly seasonal — October alone averages 240 mm while January barely receives 38 mm.

☀️ All year

Warm

Daytime highs near 29°C most of the year.

About 16 days a year above 32 °C

🌙 Nights

Stays warm

Even the coolest nights stay near 19°C.

🌧️ Rain

Very wet

About 1797 mm of rain a year.

Wettest in October

⛅ 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)

Isiro climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	29	30	29	27	27	26	26	26	26	26	26	28
Avg temp (°C)	24	25	25	24	24	23	23	23	23	23	23	23
Avg low (°C)	18	19	21	21	20	20	19	19	20	20	20	19
Precipitation (mm)	38	63	152	197	159	140	153	187	200	240	208	59

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	29	30	29	27	27	26
Avg temp (°C)	24	25	25	24	24	23
Avg low (°C)	18	19	21	21	20	20
Precipitation (mm)	38	63	152	197	159	140

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	26	26	26	26	26	28
Avg temp (°C)	23	23	23	23	23	23
Avg low (°C)	19	19	20	20	20	19
Precipitation (mm)	153	187	200	240	208	59

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with high ≥ 32°C (days)	3	6	4	0.6	—	0.1	0.1	0.0	0.1	—	—	1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with high ≥ 32°C (days)	3	6	4	0.6	—	0.1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with high ≥ 32°C (days)	0.1	0.0	0.1	—	—	1

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	65	71	80	82	79	81	82	82	80	82	77	67
Relative humidity (%)	76	75	83	90	91	90	88	89	89	91	90	83
Wind speed (km/h)	0.7	0.6	0.4	0.4	0.5	0.6	0.6	0.6	0.6	0.5	0.6	0.7

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	65	71	80	82	79	81
Relative humidity (%)	76	75	83	90	91	90
Wind speed (km/h)	0.7	0.6	0.4	0.4	0.5	0.6

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	82	82	80	82	77	67
Relative humidity (%)	88	89	89	91	90	83
Wind speed (km/h)	0.6	0.6	0.6	0.5	0.6	0.7

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 →