Isiro climate

Name: Isiro
Address: CD

Isiro is warmest in February, with average highs of 32 °C, and coldest in July, when nights average 19 °C. October is the wettest month (229 mm) and January the driest (36 mm). Figures are 1991–2020 climate normals.

Across a full year Isiro averages 1,679 mm of rain and 335 days above 25 °C.

Democratic Republic of the Congo · population 255,409 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month February 32 °C
Coldest month July 19 °C
Driest month January 36 mm
Wettest month October 229 mm
Least cloud January 66 % cloud
Hottest on record February 41 °C
Coldest on record January 15 °C

What to expectIsiro through the year

Isiro has a clear annual cycle: average daily highs run from 27 °C in July to 32 °C in February, a swing of 3.2 °C in mean temperature across the year.

Counted across a normal year, 335 days a year reach 25 °C, 80 of them reach 30 °C. The warmest reading in the 1991–2020 record is 41 °C, in February.

Rain is strongly seasonal. October averages 229 mm against 36 mm in January — 6.3 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	31.2 °C	36 mm	66 %
February	31.8 °C	60 mm	69 %
March	30.0 °C	139 mm	80 %
April	28.3 °C	180 mm	86 %
May	27.8 °C	146 mm	84 %
June	27.1 °C	131 mm	85 %
July	26.7 °C	144 mm	84 %
August	26.7 °C	180 mm	85 %
September	27.2 °C	185 mm	87 %
October	26.8 °C	229 mm	90 %
November	27.3 °C	193 mm	84 %
December	29.1 °C	56 mm	69 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	31.2 °C	19.8 °C	24.8 °C	37.5 °C	15.2 °C	31	22
February	31.8 °C	20.4 °C	25.3 °C	40.6 °C	15.7 °C	28	21
March	30.0 °C	20.6 °C	24.4 °C	37.1 °C	17.2 °C	30	16
April	28.3 °C	20.5 °C	23.6 °C	36.6 °C	18.1 °C	28	5
May	27.8 °C	20.3 °C	23.2 °C	32.5 °C	18.1 °C	29	3
June	27.1 °C	19.7 °C	22.6 °C	31.6 °C	17.5 °C	27	1
July	26.7 °C	19.3 °C	22.1 °C	30.9 °C	17.2 °C	26	0
August	26.7 °C	19.3 °C	22.2 °C	30.5 °C	17.6 °C	26	0
September	27.2 °C	19.4 °C	22.4 °C	31.2 °C	17.7 °C	27	1
October	26.8 °C	19.6 °C	22.3 °C	31.5 °C	17.9 °C	26	1
November	27.3 °C	19.6 °C	22.6 °C	32.2 °C	16.7 °C	27	2
December	29.1 °C	19.5 °C	23.6 °C	34.2 °C	15.5 °C	30	10

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	36 mm	6	12 h/day	66 %	66 %	11 km/h
February	60 mm	9	12 h/day	69 %	68 %	11 km/h
March	139 mm	19	12 h/day	80 %	81 %	11 km/h
April	180 mm	23	12 h/day	86 %	89 %	8.8 km/h
May	146 mm	24	12 h/day	84 %	90 %	7.3 km/h
June	131 mm	23	12 h/day	85 %	91 %	6.7 km/h
July	144 mm	25	12 h/day	84 %	91 %	6.7 km/h
August	180 mm	26	12 h/day	85 %	91 %	7.1 km/h
September	185 mm	26	12 h/day	87 %	91 %	7.4 km/h
October	229 mm	28	12 h/day	90 %	92 %	7.2 km/h
November	193 mm	23	12 h/day	84 %	90 %	8.1 km/h
December	56 mm	10	12 h/day	69 %	79 %	9.6 km/h

How Isiro compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Isiro	32 °C	19 °C	1,679 mm	335
Bunia · Democratic Republic of the Congo	28 °C	17 °C	1,094 mm	284
Butembo · Democratic Republic of the Congo	25 °C	14 °C	1,754 mm	32
Kisangani · Democratic Republic of the Congo	32 °C	22 °C	1,576 mm	362
Yei · South Sudan	34 °C	19 °C	1,425 mm	359

Planning a trip? See the best time to visit Isiro.

QuestionsCommon questions about Isiro’s climate

When is the best time to visit Isiro?

That depends on what you want, so the honest answer is a comparison rather than a single month. July, August, October sit closest to 20 °C on average, February is the warmest month and January the driest. The month-by-month table above has the full picture.

How hot does Isiro get?

In February, the warmest month, daily highs average 32 °C. About 80 days a year pass 30 °C. The highest value in the 1991–2020 record is 41 °C.

How cold does it get in winter?

Nights average 19 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Isiro?

October, averaging 229 mm over 28 days with rain. The driest month is January with 36 mm. The year as a whole averages 1,679 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Isiro rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 2.774°, 27.616° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.