Koidu climate — normals and trends

Q: What is the climate of Koidu?

Koidu has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 24.7 °C and it receives 2,590 mm of precipitation per year.

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

The hottest day measured in Koidu between 1940 and 2025 was 23 February 1987, reaching 39.1 °C.

Q: What is the coldest day in Koidu?

The coldest day measured in Koidu between 1940 and 2025 was 10 January 1957, at 12.8 °C.

Q: Does it snow in Koidu?

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

Q: Has the climate of Koidu warmed?

Yes: Koidu warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Koidu?

The wettest day measured in Koidu between 1940 and 2025 was 10 June 1973, with 167 mm of rain in 24 hours.

Q: What was the windiest day in Koidu?

The windiest day measured in Koidu between 1940 and 2025 was 21 February 1943, with winds reaching 27.5 km/h.

Q: What is the warmest month in Koidu?

The warmest month in Koidu is March (27.4 °C on average); the coldest is August (22.8 °C).

Q: How much does it rain in Koidu?

Koidu receives on average 2,590 mm of precipitation per year, spread over about 229 rainy days.

Q: Is it sunny in Koidu?

Koidu gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.

Koidu (Sierra Leone) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 24.7 °C and it receives 2,590 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 March (27.4 °C on average) and the coldest is August (22.8 °C). Rainfall peaks in September.

Koidu averages 0 frost days, 143 hot days (≥ 30 °C) and 229 rainy days per year.

Koidu has warmed by +1.6 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.

The hottest day of the period reached 39.1 °C (on 23 February 1987) and the coldest 12.8 °C (on 10 January 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

KoiduEastern Province

coords: 8.64°, -10.97°
period: 1940–2025 · 86 yrs

AmTropical monsoonWarmest monthMarchColdest monthAugustWettest monthSeptemberDriest monthJanuary

Mean daily temperature

24.7°C

Average daily high

29.6°C

Average daily low

21.3°C

Annual rainfall

2,590mm

Sunshine / day

9.0h

Mean relative humidity

78%

Average peak wind

9.7km/h

Seasonal range

4.6°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

143 d/yr

Rainy days (≥ 1 mm)

229 d/yr

Annual snowfall

0.0 cm

Average feels-like high

33.6 °C

Average feels-like low

24.5 °C

Average peak gust

25.1 km/h

Tropical nights (≥ 20 °C)

320 d/yr

Solar radiation

17.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.6 °C

since 1940

+0.2 °C per decade · r² = 0.72 · 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

39.1 °C

23 February 1987

Coldest day

12.8 °C

10 January 1957

Wettest day

167 mm

10 June 1973

Windiest day

27.5 km/h

21 February 1943

Strongest gust

60.1 km/h

1 March 1943

Hottest feels-like

44.4 °C

27 April 2024

Coldest feels-like

10.1 °C

10 January 1957

Sunniest day

12.2 h

3 June 1944

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	38.9 °C18 February 2025	15.4 °C4 January 2025	25.7 °C	2,628 mm	186
2024	38.2 °C16 March 2024	14.4 °C19 December 2024	26.2 °C	2,500 mm	214
2023	38.8 °C2 March 2023	13.8 °C5 January 2023	25.7 °C	2,133 mm	207
2022	38.9 °C7 March 2022	15.0 °C22 January 2022	25.6 °C	2,207 mm	187
2021	37.5 °C5 February 2021	16.7 °C23 December 2021	25.8 °C	2,647 mm	224
2020	39.0 °C5 March 2020	15.3 °C3 January 2020	25.7 °C	2,383 mm	212
2019	38.4 °C17 March 2019	17.3 °C31 December 2019	25.7 °C	2,835 mm	210
2018	37.5 °C17 February 2018	15.8 °C24 December 2018	25.3 °C	2,524 mm	213
2017	37.3 °C9 March 2017	16.7 °C26 December 2017	25.6 °C	2,486 mm	196
2016	38.7 °C21 February 2016	15.3 °C6 January 2016	25.4 °C	2,180 mm	173
2015	36.0 °C7 March 2015	14.3 °C19 December 2015	25.0 °C	2,121 mm	167
2014	36.9 °C13 March 2014	15.1 °C28 December 2014	25.0 °C	2,126 mm	144
2013	36.3 °C9 February 2013	15.0 °C6 January 2013	25.1 °C	2,037 mm	168
2012	36.7 °C16 March 2012	14.6 °C2 January 2012	24.8 °C	2,629 mm	149
2011	36.9 °C20 February 2011	14.9 °C17 December 2011	24.8 °C	2,037 mm	142
2010	36.7 °C6 February 2010	17.0 °C14 January 2010	25.0 °C	2,444 mm	136
2009	36.5 °C17 March 2009	16.0 °C11 December 2009	25.2 °C	2,370 mm	174
2008	36.0 °C23 February 2008	16.3 °C4 January 2008	24.7 °C	2,377 mm	154
2007	36.7 °C21 March 2007	15.0 °C15 January 2007	25.0 °C	2,414 mm	149
2006	36.1 °C4 March 2006	16.3 °C8 December 2006	25.1 °C	2,391 mm	149
2005	34.5 °C12 February 2005	14.9 °C12 January 2005	24.8 °C	2,555 mm	136
2004	35.1 °C10 March 2004	17.2 °C4 January 2004	24.9 °C	2,788 mm	119
2003	36.2 °C16 February 2003	15.3 °C30 December 2003	25.1 °C	2,670 mm	156
2002	35.5 °C9 February 2002	14.8 °C28 December 2002	25.0 °C	2,586 mm	162
2001	36.8 °C28 February 2001	15.7 °C14 February 2001	24.8 °C	2,471 mm	140
2000	35.3 °C25 March 2000	14.0 °C12 February 2000	24.5 °C	2,432 mm	111
1999	36.8 °C3 March 1999	13.8 °C15 December 1999	24.7 °C	2,296 mm	140
1998	37.4 °C15 March 1998	14.9 °C21 January 1998	25.2 °C	2,232 mm	154
1997	36.7 °C19 March 1997	14.7 °C27 December 1997	25.0 °C	2,593 mm	132
1996	34.6 °C24 February 1996	17.5 °C14 December 1996	24.8 °C	2,671 mm	128
1995	37.0 °C17 March 1995	15.3 °C21 January 1995	24.8 °C	2,599 mm	131
1994	34.9 °C29 January 1994	15.2 °C2 January 1994	24.5 °C	2,473 mm	149
1993	34.9 °C11 February 1993	15.0 °C12 January 1993	24.6 °C	2,623 mm	138
1992	34.9 °C17 March 1992	15.0 °C1 December 1992	24.5 °C	2,637 mm	108
1991	36.5 °C4 April 1991	13.8 °C4 January 1991	24.7 °C	2,179 mm	131
1990	37.1 °C17 March 1990	14.8 °C29 December 1990	25.0 °C	2,517 mm	147
1989	37.3 °C2 March 1989	15.0 °C10 January 1989	25.1 °C	2,982 mm	174
1988	37.9 °C11 March 1988	14.5 °C26 December 1988	25.3 °C	2,520 mm	180
1987	39.1 °C23 February 1987	16.9 °C28 December 1987	25.6 °C	2,565 mm	178
1986	38.8 °C6 April 1986	15.0 °C12 January 1986	24.9 °C	2,644 mm	160
1985	36.3 °C25 February 1985	14.2 °C12 February 1985	24.8 °C	2,591 mm	158
1984	36.8 °C29 February 1984	14.6 °C19 December 1984	24.8 °C	2,742 mm	153
1983	37.7 °C6 March 1983	14.4 °C2 February 1983	25.1 °C	2,323 mm	148
1982	36.0 °C16 March 1982	15.2 °C13 December 1982	24.6 °C	2,585 mm	143
1981	36.6 °C3 March 1981	14.4 °C6 January 1981	24.7 °C	2,870 mm	153
1980	36.0 °C16 March 1980	15.7 °C20 December 1980	24.8 °C	3,348 mm	149
1979	35.7 °C4 March 1979	14.9 °C29 December 1979	24.9 °C	2,817 mm	143
1978	35.6 °C10 February 1978	16.0 °C4 December 1978	24.6 °C	3,000 mm	128
1977	36.2 °C27 February 1977	15.7 °C22 December 1977	24.9 °C	2,516 mm	155
1976	36.0 °C6 March 1976	14.6 °C4 December 1976	24.3 °C	2,586 mm	130
1975	36.4 °C18 March 1975	14.5 °C23 January 1975	24.7 °C	2,624 mm	141
1974	36.2 °C24 March 1974	14.2 °C12 January 1974	24.6 °C	2,777 mm	128
1973	38.3 °C7 March 1973	15.8 °C18 December 1973	25.3 °C	2,796 mm	177
1972	34.4 °C9 March 1972	14.9 °C3 January 1972	24.6 °C	3,486 mm	144
1971	37.2 °C21 March 1971	14.4 °C20 December 1971	24.3 °C	3,105 mm	128
1970	35.6 °C22 March 1970	13.4 °C14 December 1970	24.6 °C	2,607 mm	137
1969	36.2 °C19 February 1969	17.8 °C4 December 1969	24.4 °C	3,040 mm	124
1968	36.5 °C19 March 1968	15.6 °C6 January 1968	24.6 °C	3,326 mm	134
1967	35.8 °C17 March 1967	14.0 °C5 January 1967	24.4 °C	3,179 mm	136
1966	36.5 °C1 February 1966	14.8 °C4 January 1966	24.7 °C	2,586 mm	153
1965	36.6 °C16 March 1965	15.2 °C21 December 1965	24.4 °C	2,241 mm	141
1964	36.2 °C3 February 1964	16.8 °C13 January 1964	24.5 °C	2,308 mm	124
1963	34.5 °C6 April 1963	16.9 °C26 December 1963	24.6 °C	2,797 mm	161
1962	36.2 °C10 February 1962	16.0 °C12 December 1962	24.3 °C	2,798 mm	129
1961	36.3 °C5 March 1961	15.7 °C10 January 1961	24.5 °C	2,757 mm	148
1960	36.5 °C12 February 1960	14.6 °C30 December 1960	24.6 °C	2,743 mm	127
1959	36.4 °C20 March 1959	15.5 °C18 December 1959	24.4 °C	2,454 mm	132
1958	36.4 °C13 March 1958	15.7 °C31 December 1958	24.0 °C	2,729 mm	77
1957	35.2 °C17 February 1957	12.8 °C10 January 1957	23.9 °C	3,240 mm	90
1956	33.8 °C20 March 1956	15.1 °C7 January 1956	23.7 °C	2,478 mm	91
1955	35.4 °C30 January 1955	13.8 °C28 December 1955	23.8 °C	2,874 mm	94
1954	34.8 °C11 February 1954	15.6 °C14 December 1954	23.7 °C	2,871 mm	99
1953	36.8 °C3 April 1953	16.7 °C4 December 1953	24.5 °C	2,875 mm	121
1952	35.6 °C13 April 1952	15.1 °C13 December 1952	24.3 °C	2,772 mm	144
1951	34.3 °C3 April 1951	15.0 °C29 December 1951	24.1 °C	2,733 mm	113
1950	37.1 °C8 March 1950	16.1 °C15 January 1950	24.1 °C	2,410 mm	114
1949	35.7 °C17 January 1949	14.3 °C18 December 1949	24.2 °C	2,562 mm	111
1948	36.1 °C22 February 1948	15.4 °C15 January 1948	24.3 °C	2,348 mm	129
1947	36.3 °C21 February 1947	13.9 °C3 January 1947	24.4 °C	2,434 mm	144
1946	35.6 °C14 February 1946	14.7 °C30 December 1946	23.9 °C	2,373 mm	107
1945	36.4 °C15 March 1945	13.6 °C24 December 1945	24.1 °C	2,057 mm	120
1944	32.6 °C12 February 1944	15.3 °C19 December 1944	23.8 °C	2,677 mm	86
1943	37.2 °C4 March 1943	14.7 °C13 January 1943	23.7 °C	2,495 mm	116
1942	35.0 °C18 March 1942	14.4 °C23 December 1942	23.9 °C	2,115 mm	117
1941	35.6 °C2 April 1941	16.0 °C9 December 1941	24.1 °C	2,688 mm	109
1940	35.0 °C11 March 1940	14.7 °C7 January 1940	23.9 °C	2,472 mm	84

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

30.7 °C

+1.1 °C

Hot days (≥ 30 °C)

186 d/yr

+43

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2628 mm

+38 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	34.8 °C	+2.9 °C	1 mm	-11 mm
Feb	36.4 °C	+2.9 °C	1 mm	-16 mm
Mar	35.8 °C	+2.4 °C	44 mm	-14 mm
Apr	33.2 °C	+1.7 °C	99 mm	-24 mm
May	30.4 °C	+0.9 °C	153 mm	-113 mm
Jun	29.5 °C	+1.3 °C	193 mm	-161 mm
Jul	26.7 °C	+0.1 °C	481 mm	+102 mm
Aug	26.4 °C	+0.2 °C	598 mm	+172 mm
Sep	27.8 °C	+0.5 °C	635 mm	+188 mm
Oct	29.1 °C	+0.7 °C	284 mm	-66 mm
Nov	29.1 °C	+0.4 °C	122 mm	-13 mm
Dec	30.1 °C	+0.3 °C	17 mm	-5 mm

The year's extremes

Hottest day

38.9 °C

18 Feb 2025

Coldest day

15.4 °C

4 Jan 2025

Wettest day

96.1 mm

9 Jul 2025

Windiest day

18.6 km/h

2 Mar 2025

Strongest gust

41.4 km/h

4 Mar 2025

Hottest feels-like

42.2 °C

17 Mar 2025

Coldest feels-like

14.0 °C

4 Jan 2025

Sunniest day

12.1 h

25 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 Koidu?

Koidu has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 24.7 °C and it receives 2,590 mm of precipitation per year.

What is the hottest day ever recorded in Koidu?

The hottest day measured in Koidu between 1940 and 2025 was 23 February 1987, reaching 39.1 °C.

What is the coldest day in Koidu?

The coldest day measured in Koidu between 1940 and 2025 was 10 January 1957, at 12.8 °C.

Does it snow in Koidu?

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

Has the climate of Koidu warmed?

Yes: Koidu warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Koidu?

The wettest day measured in Koidu between 1940 and 2025 was 10 June 1973, with 167 mm of rain in 24 hours.

What was the windiest day in Koidu?

The windiest day measured in Koidu between 1940 and 2025 was 21 February 1943, with winds reaching 27.5 km/h.

What is the warmest month in Koidu?

The warmest month in Koidu is March (27.4 °C on average); the coldest is August (22.8 °C).

How much does it rain in Koidu?

Koidu receives on average 2,590 mm of precipitation per year, spread over about 229 rainy days.

Is it sunny in Koidu?

Koidu gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.

Are there tropical nights in Koidu?

Yes: Koidu has on average 320 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Koidu?

In Koidu, between 1940 and 2025, the highest apparent temperature reached 44.4 °C on 27 April 2024, and the lowest was 10.1 °C on 10 January 1957.

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