Isiro climate — normals and trends

Q: What is the climate of Isiro?

Isiro has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 22.9 °C and it receives 1,887 mm of precipitation per year.

Q: What is the hottest day ever recorded in Isiro?

The hottest day measured in Isiro between 1940 and 2025 was 21 February 2005, reaching 40.2 °C.

Q: What is the coldest day in Isiro?

The coldest day measured in Isiro between 1940 and 2025 was 5 February 1957, at 12.7 °C.

Q: Does it snow in Isiro?

Almost never: Isiro sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Isiro warmed?

Yes: Isiro warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Isiro?

The wettest day measured in Isiro between 1940 and 2025 was 4 September 1986, with 121 mm of rain in 24 hours.

Q: What was the windiest day in Isiro?

The windiest day measured in Isiro between 1940 and 2025 was 19 March 1959, with winds reaching 20.3 km/h.

Q: What is the warmest month in Isiro?

The warmest month in Isiro is February (24.4 °C on average); the coldest is July (22.0 °C).

Q: How much does it rain in Isiro?

Isiro receives on average 1,887 mm of precipitation per year, spread over about 265 rainy days.

Q: Is it sunny in Isiro?

Isiro gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.

Isiro (Democratic Republic of Congo) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 22.9 °C and it receives 1,887 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 February (24.4 °C on average) and the coldest is July (22.0 °C). Rainfall peaks in October.

Isiro averages 0 frost days, 67 hot days (≥ 30 °C) and 265 rainy days per year.

Isiro has warmed by +1.7 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.

The hottest day of the period reached 40.2 °C (on 21 February 2005) and the coldest 12.7 °C (on 5 February 1957).

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

IsiroHaut-Uele

coords: 2.77°, 27.62°
period: 1940–2025 · 86 yrs

AmTropical monsoonWarmest monthFebruaryColdest monthJulyWettest monthOctoberDriest monthJanuary

Mean daily temperature

22.9°C

Average daily high

27.8°C

Average daily low

19.8°C

Annual rainfall

1,887mm

Sunshine / day

8.8h

Mean relative humidity

86%

Average peak wind

8.4km/h

Seasonal range

2.4°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

67 d/yr

Rainy days (≥ 1 mm)

265 d/yr

Annual snowfall

0.0 cm

Average feels-like high

32.4 °C

Average feels-like low

22.4 °C

Average peak gust

24.6 km/h

Tropical nights (≥ 20 °C)

150 d/yr

Solar radiation

17.7 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.7 °C

since 1940

+0.2 °C per decade · r² = 0.67 · p = < 0.001

19402025

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

40.2 °C

21 February 2005

Coldest day

12.7 °C

5 February 1957

Wettest day

121 mm

4 September 1986

Windiest day

20.3 km/h

19 March 1959

Strongest gust

53.6 km/h

9 March 2010

Hottest feels-like

42.5 °C

25 February 2005

Coldest feels-like

8.9 °C

5 February 1957

Sunniest day

12.0 h

29 May 1941

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	35.9 °C14 March 2025	16.8 °C12 January 2025	23.9 °C	1,211 mm	152
2024	37.3 °C4 March 2024	18.4 °C28 November 2024	25.0 °C	1,166 mm	196
2023	36.4 °C20 February 2023	17.4 °C9 February 2023	24.0 °C	1,678 mm	130
2022	37.0 °C5 March 2022	17.3 °C8 February 2022	23.8 °C	1,507 mm	125
2021	37.7 °C1 March 2021	18.2 °C9 February 2021	24.0 °C	1,643 mm	133
2020	37.7 °C5 March 2020	17.5 °C25 January 2020	24.2 °C	1,492 mm	141
2019	36.5 °C15 March 2019	17.9 °C31 December 2019	24.0 °C	1,631 mm	119
2018	38.3 °C8 February 2018	17.6 °C6 January 2018	23.7 °C	1,500 mm	93
2017	35.6 °C16 January 2017	17.7 °C6 January 2017	23.9 °C	1,565 mm	114
2016	37.9 °C5 February 2016	18.2 °C30 January 2016	24.2 °C	1,464 mm	121
2015	36.4 °C9 February 2015	16.0 °C11 January 2015	23.8 °C	1,615 mm	107
2014	36.7 °C22 February 2014	17.2 °C18 February 2014	23.6 °C	1,424 mm	101
2013	34.9 °C23 February 2013	15.8 °C16 December 2013	23.3 °C	1,523 mm	76
2012	36.2 °C5 February 2012	16.1 °C25 January 2012	23.3 °C	1,574 mm	83
2011	34.8 °C18 February 2011	16.8 °C30 November 2011	23.3 °C	1,660 mm	104
2010	35.4 °C2 February 2010	17.9 °C3 March 2010	23.5 °C	1,632 mm	82
2009	34.3 °C16 January 2009	18.2 °C6 January 2009	23.2 °C	1,852 mm	55
2008	33.8 °C3 March 2008	16.6 °C3 February 2008	23.0 °C	1,648 mm	80
2007	35.6 °C5 February 2007	16.8 °C25 December 2007	23.3 °C	1,718 mm	106
2006	34.8 °C8 February 2006	15.7 °C1 December 2006	23.0 °C	1,966 mm	61
2005	40.2 °C21 February 2005	17.6 °C18 July 2005	23.5 °C	1,670 mm	85
2004	34.9 °C11 February 2004	16.1 °C5 February 2004	23.3 °C	1,501 mm	85
2003	35.7 °C8 February 2003	16.4 °C2 January 2003	23.1 °C	1,684 mm	72
2002	36.0 °C25 February 2002	15.2 °C14 January 2002	23.0 °C	1,715 mm	69
2001	33.9 °C27 February 2001	15.2 °C11 January 2001	22.8 °C	1,637 mm	55
2000	35.3 °C5 March 2000	16.5 °C31 January 2000	22.7 °C	1,762 mm	52
1999	35.5 °C18 February 1999	17.7 °C11 July 1999	22.6 °C	2,001 mm	53
1998	36.6 °C11 March 1998	16.3 °C14 January 1998	23.6 °C	1,713 mm	97
1997	34.9 °C5 March 1997	15.1 °C14 February 1997	23.0 °C	1,930 mm	73
1996	33.4 °C30 January 1996	16.7 °C24 December 1996	22.7 °C	2,132 mm	44
1995	34.2 °C15 March 1995	17.1 °C24 January 1995	23.0 °C	1,920 mm	57
1994	35.4 °C2 March 1994	16.5 °C18 February 1994	22.9 °C	1,964 mm	81
1993	33.7 °C15 February 1993	14.6 °C10 February 1993	22.8 °C	1,987 mm	57
1992	36.8 °C12 March 1992	15.5 °C29 February 1992	22.8 °C	1,893 mm	67
1991	33.7 °C6 February 1991	16.7 °C29 December 1991	22.9 °C	1,857 mm	56
1990	33.4 °C16 March 1990	16.0 °C18 January 1990	23.0 °C	1,887 mm	66
1989	35.9 °C25 February 1989	14.2 °C21 January 1989	22.8 °C	1,895 mm	65
1988	35.3 °C29 February 1988	16.6 °C19 January 1988	23.1 °C	2,056 mm	66
1987	34.4 °C29 December 1987	16.3 °C22 December 1987	23.3 °C	2,045 mm	74
1986	32.5 °C3 February 1986	16.2 °C6 December 1986	22.6 °C	2,272 mm	39
1985	38.0 °C11 March 1985	14.5 °C19 February 1985	22.4 °C	2,091 mm	42
1984	33.4 °C28 January 1984	13.8 °C18 January 1984	22.5 °C	1,972 mm	54
1983	35.7 °C8 February 1983	14.2 °C28 December 1983	23.2 °C	1,820 mm	98
1982	35.3 °C19 February 1982	14.9 °C10 February 1982	22.6 °C	1,845 mm	44
1981	33.7 °C1 March 1981	15.2 °C13 February 1981	22.6 °C	2,095 mm	39
1980	35.2 °C16 January 1980	16.7 °C14 December 1980	22.8 °C	1,900 mm	47
1979	32.1 °C6 February 1979	17.1 °C3 December 1979	22.7 °C	2,114 mm	32
1978	33.0 °C23 February 1978	15.2 °C19 January 1978	22.6 °C	1,886 mm	45
1977	32.5 °C28 February 1977	15.3 °C7 January 1977	22.4 °C	2,125 mm	26
1976	33.2 °C19 January 1976	14.8 °C2 January 1976	22.1 °C	2,196 mm	19
1975	33.6 °C22 January 1975	15.9 °C16 January 1975	22.1 °C	2,325 mm	32
1974	32.5 °C10 February 1974	15.2 °C19 January 1974	22.1 °C	2,173 mm	31
1973	36.3 °C20 February 1973	16.5 °C22 December 1973	22.9 °C	1,896 mm	74
1972	32.9 °C5 January 1972	15.4 °C10 February 1972	22.5 °C	2,376 mm	46
1971	34.7 °C5 March 1971	13.1 °C30 January 1971	22.2 °C	2,134 mm	64
1970	33.9 °C27 February 1970	14.9 °C16 December 1970	22.7 °C	2,225 mm	61
1969	33.6 °C4 February 1969	15.4 °C31 January 1969	22.6 °C	2,405 mm	42
1968	33.6 °C27 February 1968	14.9 °C18 January 1968	22.3 °C	2,238 mm	33
1967	32.7 °C12 February 1967	15.9 °C5 February 1967	22.2 °C	2,453 mm	28
1966	35.0 °C5 April 1966	17.2 °C17 March 1966	22.9 °C	1,819 mm	108
1965	32.9 °C2 August 1965	15.5 °C18 December 1965	22.4 °C	1,906 mm	76
1964	32.7 °C30 May 1964	17.4 °C10 August 1964	22.4 °C	2,060 mm	66
1963	33.1 °C24 March 1963	17.6 °C22 July 1963	22.1 °C	2,118 mm	17
1962	34.2 °C30 January 1962	16.3 °C6 January 1962	22.1 °C	2,281 mm	39
1961	35.3 °C8 March 1961	15.5 °C29 December 1961	22.2 °C	2,318 mm	49
1960	33.7 °C31 January 1960	16.7 °C31 January 1960	22.6 °C	2,137 mm	49
1959	36.6 °C9 March 1959	15.8 °C20 February 1959	22.7 °C	1,992 mm	66
1958	36.3 °C20 February 1958	16.3 °C16 February 1958	23.0 °C	1,852 mm	90
1957	34.1 °C15 February 1957	12.7 °C5 February 1957	22.4 °C	1,969 mm	44
1956	32.8 °C30 January 1956	14.4 °C18 January 1956	22.0 °C	2,196 mm	36
1955	32.8 °C20 February 1955	16.1 °C1 January 1955	22.0 °C	2,020 mm	19
1954	33.3 °C31 January 1954	15.6 °C23 January 1954	22.0 °C	1,944 mm	24
1953	32.3 °C14 March 1953	16.5 °C20 December 1953	22.1 °C	2,593 mm	18
1952	34.8 °C25 January 1952	17.4 °C25 February 1952	22.3 °C	2,610 mm	34
1951	34.0 °C2 March 1951	15.2 °C14 February 1951	22.3 °C	2,223 mm	35
1950	33.9 °C7 January 1950	15.6 °C18 July 1950	22.2 °C	1,837 mm	44
1949	34.5 °C19 February 1949	15.5 °C12 February 1949	22.4 °C	1,635 mm	50
1948	32.5 °C8 February 1948	15.4 °C26 December 1948	22.0 °C	2,060 mm	21
1947	33.7 °C12 February 1947	17.6 °C4 December 1947	22.4 °C	1,825 mm	39
1946	35.7 °C28 January 1946	15.6 °C10 December 1946	22.5 °C	1,828 mm	83
1945	35.0 °C17 February 1945	14.2 °C17 January 1945	22.2 °C	1,736 mm	55
1944	37.1 °C15 February 1944	15.8 °C11 January 1944	22.9 °C	1,536 mm	91
1943	37.1 °C2 March 1943	16.1 °C26 February 1943	22.7 °C	1,453 mm	76
1942	34.6 °C9 January 1942	14.9 °C28 November 1942	22.2 °C	1,720 mm	65
1941	35.5 °C31 January 1941	15.4 °C28 January 1941	22.9 °C	1,397 mm	81
1940	32.2 °C23 January 1940	15.8 °C13 January 1940	22.0 °C	1,912 mm	22

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

29.5 °C

+1.7 °C

Hot days (≥ 30 °C)

152 d/yr

+85

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1211 mm

-676 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	32.3 °C	+2.2 °C	35 mm	-20 mm
Feb	33.1 °C	+2.5 °C	8 mm	-79 mm
Mar	31.1 °C	+1.8 °C	103 mm	-70 mm
Apr	29.1 °C	+1.1 °C	93 mm	-95 mm
May	29.2 °C	+1.6 °C	105 mm	-58 mm
Jun	29.6 °C	+2.7 °C	62 mm	-80 mm
Jul	27.2 °C	+0.7 °C	143 mm	-8 mm
Aug	27.2 °C	+0.7 °C	138 mm	-44 mm
Sep	28.5 °C	+1.7 °C	178 mm	-23 mm
Oct	28.0 °C	+1.5 °C	218 mm	-27 mm
Nov	28.9 °C	+2.3 °C	110 mm	-109 mm
Dec	29.9 °C	+1.6 °C	18 mm	-63 mm

The year's extremes

Hottest day

35.9 °C

14 Mar 2025

Coldest day

16.8 °C

12 Jan 2025

Wettest day

25.3 mm

7 Nov 2025

Windiest day

15.0 km/h

7 Feb 2025

Strongest gust

39.6 km/h

26 Nov 2025

Hottest feels-like

39.5 °C

14 Mar 2025

Coldest feels-like

16.7 °C

31 Jan 2025

Sunniest day

12.0 h

11 May 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Isiro?

Isiro has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 22.9 °C and it receives 1,887 mm of precipitation per year.

What is the hottest day ever recorded in Isiro?

The hottest day measured in Isiro between 1940 and 2025 was 21 February 2005, reaching 40.2 °C.

What is the coldest day in Isiro?

The coldest day measured in Isiro between 1940 and 2025 was 5 February 1957, at 12.7 °C.

Does it snow in Isiro?

Almost never: Isiro sees virtually no snow, with about 0 frost days per year.

Has the climate of Isiro warmed?

Yes: Isiro warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Isiro?

The wettest day measured in Isiro between 1940 and 2025 was 4 September 1986, with 121 mm of rain in 24 hours.

What was the windiest day in Isiro?

The windiest day measured in Isiro between 1940 and 2025 was 19 March 1959, with winds reaching 20.3 km/h.

What is the warmest month in Isiro?

The warmest month in Isiro is February (24.4 °C on average); the coldest is July (22.0 °C).

How much does it rain in Isiro?

Isiro receives on average 1,887 mm of precipitation per year, spread over about 265 rainy days.

Is it sunny in Isiro?

Isiro gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.

Are there tropical nights in Isiro?

Yes: Isiro has on average 150 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Isiro?

In Isiro, between 1940 and 2025, the highest apparent temperature reached 42.5 °C on 25 February 2005, and the lowest was 8.9 °C on 5 February 1957.

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