Isiro weather in January

Name: Isiro
Address: CD

In January, Isiro has daytime highs averaging 31 °C, nights around 20 °C, with 6.2 wet days. Figures are 1991–2020 climate normals.

31.2°C Average high
19.8°C Average low
6.2days Wet days
36mm Rainfall
12h Daylight

Daily temperatures through January

Daily highDaily low Day of month on the horizontal axis. Highs peak at 31.9 °C and lows bottom out at 19.2 °C.

How January develops

Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.

Days	Avg high	Avg low	Chance of rain
1–10 January	30.7 °C	19.6 °C	16 %
11–20 January	31.3 °C	19.6 °C	19 %
21–31 January	31.6 °C	20.0 °C	25 %

Rain is most likely over days 21–31 of January (25 % of days) and least likely over days 1–10 (16 %).

Chance of a wet day (over 1 mm) by date in January. Wettest date over the 30 years: January 31, at 37 %. Single dates are noisy — read the shape, not the spikes.

What to expect

Measure	Typical January	Share of the month
Days above 25 °C	31 of 31	99 %
Days above 30 °C	22 of 31	71 %
Days below 0 °C	0 of 31	0 %
Days with more than 1 mm rain	6.2 of 31	20 %

Conditions in January

Measure	Average
Mean temperature	25 °C
Record high (1991–2020)	38 °C
Record low (1991–2020)	15 °C
Relative humidity	66 %
Wind speed	11 km/h
Cloud cover	66 %

January compared with the months around it

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 %
November	27.3 °C	193 mm	84 %
December	29.1 °C	56 mm	69 %

See all twelve months for Isiro

January is the 2nd warmest month here.
It is the 1st driest month of the year.
It ranks 1st for least cloud cover.
Days last about 12 hours from sunrise to sunset.
It rains on 6.2 of 31 days — 20 % of the month.
Nights are about 11 °C cooler than the middle of the day.
The hottest January day on record since 1991 reached 38 °C, 6.3 °C above the usual daytime high.

Nearby destinations in January

Destination	Avg high	Wet days
Isiro	31 °C	6.2
Bunia	27 °C	7
Butembo	24 °C	9
Kisangani	31 °C	13
Yei	33 °C	2

QuestionsJanuary in Isiro, answered

How warm is Isiro in January?

Daily highs average 31 °C and nights fall to about 20 °C, a spread of 11 °C between afternoon and dawn. That makes January the 2nd warmest month of the year here.

Does it rain much in Isiro in January?

January averages 36 mm of rain, spread over about 6 of the 31 days — 20 % of the month. Cloud cover averages 66 % of the sky.

How long are the days in January?

Isiro averages 12 hours between sunrise and sunset in January. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.

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
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: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. 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.