Kasulu climate — normals and trends

Q: What is the climate of Kasulu?

Kasulu has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 20.7 °C and it receives 1,728 mm of precipitation per year.

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

The hottest day measured in Kasulu between 1940 and 2025 was 25 September 1997, reaching 34.4 °C.

Q: What is the coldest day in Kasulu?

The coldest day measured in Kasulu between 1940 and 2025 was 31 July 1960, at 9.6 °C.

Q: Does it snow in Kasulu?

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

Q: Has the climate of Kasulu warmed?

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

Q: What is the wettest day in Kasulu?

The wettest day measured in Kasulu between 1940 and 2025 was 17 December 1949, with 49 mm of rain in 24 hours.

Q: What was the windiest day in Kasulu?

The windiest day measured in Kasulu between 1940 and 2025 was 23 October 2018, with winds reaching 23.8 km/h.

Q: What is the warmest month in Kasulu?

The warmest month in Kasulu is September (22.7 °C on average); the coldest is December (19.9 °C).

Q: How much does it rain in Kasulu?

Kasulu receives on average 1,728 mm of precipitation per year, spread over about 208 rainy days.

Q: Is it sunny in Kasulu?

Kasulu gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Kasulu (Tanzania) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 20.7 °C and it receives 1,728 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 September (22.7 °C on average) and the coldest is December (19.9 °C). Rainfall peaks in December.

Kasulu averages 0 frost days, 20 hot days (≥ 30 °C) and 208 rainy days per year.

Kasulu has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.

The hottest day of the period reached 34.4 °C (on 25 September 1997) and the coldest 9.6 °C (on 31 July 1960).

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

KasuluKigoma

coords: -4.58°, 30.10°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthSeptemberColdest monthDecemberWettest monthDecemberDriest monthJuly

Mean daily temperature

20.7°C

Average daily high

26.0°C

Average daily low

16.6°C

Annual rainfall

1,728mm

Sunshine / day

10.4h

Mean relative humidity

75%

Average peak wind

10.8km/h

Seasonal range

2.8°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

20 d/yr

Rainy days (≥ 1 mm)

208 d/yr

Annual snowfall

0.0 cm

Average feels-like high

27.8 °C

Average feels-like low

17.9 °C

Average peak gust

31.7 km/h

Tropical nights (≥ 20 °C)

1 d/yr

Solar radiation

19.2 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.7 °C

since 1940

+0.2 °C per decade · r² = 0.70 · 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

34.4 °C

25 September 1997

Coldest day

9.6 °C

31 July 1960

Wettest day

49 mm

17 December 1949

Windiest day

23.8 km/h

23 October 2018

Strongest gust

57.6 km/h

26 October 2018

Hottest feels-like

35.5 °C

2 February 2010

Coldest feels-like

9.1 °C

31 July 1960

Sunniest day

12.0 h

2 January 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	32.1 °C14 September 2025	11.7 °C16 June 2025	21.8 °C	1,482 mm	34
2024	32.5 °C16 September 2024	12.4 °C1 July 2024	22.3 °C	1,782 mm	47
2023	33.1 °C22 August 2023	12.0 °C5 July 2023	21.9 °C	1,932 mm	42
2022	32.3 °C12 October 2022	12.2 °C5 July 2022	21.6 °C	1,653 mm	36
2021	31.7 °C7 September 2021	12.0 °C8 July 2021	21.7 °C	1,471 mm	29
2020	32.8 °C17 September 2020	13.6 °C18 June 2020	21.8 °C	1,735 mm	36
2019	32.0 °C19 September 2019	13.2 °C27 July 2019	21.7 °C	1,615 mm	25
2018	33.2 °C19 September 2018	12.7 °C6 June 2018	21.4 °C	1,534 mm	35
2017	32.3 °C7 October 2017	14.1 °C11 July 2017	21.6 °C	1,592 mm	24
2016	32.6 °C5 September 2016	12.3 °C1 July 2016	21.9 °C	1,527 mm	42
2015	33.1 °C20 September 2015	12.2 °C13 July 2015	21.6 °C	1,772 mm	40
2014	31.0 °C22 September 2014	14.0 °C5 July 2014	21.4 °C	1,551 mm	9
2013	31.8 °C19 August 2013	12.8 °C8 June 2013	21.3 °C	1,620 mm	22
2012	31.9 °C5 October 2012	13.8 °C29 June 2012	21.0 °C	1,672 mm	16
2011	32.5 °C14 September 2011	12.6 °C8 July 2011	21.0 °C	1,739 mm	9
2010	33.5 °C4 October 2010	13.9 °C10 July 2010	21.7 °C	1,488 mm	38
2009	32.9 °C14 September 2009	11.8 °C21 July 2009	21.3 °C	1,470 mm	33
2008	33.4 °C27 September 2008	12.5 °C15 July 2008	20.9 °C	1,446 mm	34
2007	33.2 °C25 September 2007	11.7 °C20 June 2007	21.1 °C	1,466 mm	19
2006	32.4 °C14 October 2006	13.2 °C17 June 2006	20.9 °C	1,735 mm	28
2005	32.5 °C28 September 2005	13.1 °C18 July 2005	21.4 °C	1,427 mm	33
2004	32.3 °C9 October 2004	12.0 °C14 June 2004	21.0 °C	1,341 mm	18
2003	31.4 °C1 October 2003	12.4 °C10 July 2003	21.2 °C	1,298 mm	38
2002	31.9 °C26 September 2002	13.6 °C15 June 2002	21.0 °C	1,466 mm	37
2001	31.3 °C12 September 2001	13.4 °C15 June 2001	20.6 °C	1,522 mm	22
2000	32.5 °C2 October 2000	13.4 °C19 July 2000	21.1 °C	1,365 mm	48
1999	31.3 °C25 September 1999	13.3 °C29 June 1999	20.6 °C	1,317 mm	9
1998	31.7 °C8 October 1998	13.9 °C1 July 1998	21.5 °C	1,511 mm	22
1997	34.4 °C25 September 1997	13.0 °C17 July 1997	21.0 °C	1,767 mm	50
1996	30.5 °C25 September 1996	13.0 °C24 June 1996	20.8 °C	1,564 mm	5
1995	32.0 °C25 September 1995	13.7 °C15 June 1995	21.0 °C	1,597 mm	18
1994	31.5 °C28 September 1994	12.8 °C3 June 1994	20.7 °C	1,828 mm	8
1993	32.8 °C24 October 1993	13.8 °C26 July 1993	21.0 °C	1,482 mm	31
1992	31.2 °C26 September 1992	12.6 °C16 July 1992	20.8 °C	1,581 mm	17
1991	31.5 °C25 September 1991	12.0 °C21 July 1991	20.7 °C	1,763 mm	9
1990	31.3 °C13 October 1990	12.5 °C6 July 1990	20.9 °C	1,534 mm	5
1989	30.1 °C28 September 1989	11.4 °C2 July 1989	20.5 °C	1,744 mm	1
1988	30.1 °C17 September 1988	13.1 °C7 July 1988	20.9 °C	1,763 mm	1
1987	31.8 °C31 August 1987	12.6 °C24 June 1987	21.2 °C	1,880 mm	18
1986	31.7 °C25 September 1986	11.8 °C9 July 1986	20.5 °C	1,911 mm	18
1985	31.0 °C8 October 1985	13.2 °C18 July 1985	20.5 °C	1,550 mm	6
1984	31.6 °C26 September 1984	13.8 °C10 June 1984	20.5 °C	1,754 mm	12
1983	31.0 °C30 September 1983	14.1 °C29 June 1983	20.9 °C	1,809 mm	8
1982	31.9 °C3 September 1982	13.5 °C21 July 1982	20.7 °C	1,823 mm	13
1981	31.5 °C24 September 1981	12.7 °C11 June 1981	20.5 °C	1,795 mm	9
1980	31.4 °C4 September 1980	13.6 °C7 June 1980	20.6 °C	1,777 mm	14
1979	32.6 °C2 September 1979	12.3 °C13 July 1979	20.6 °C	1,794 mm	35
1978	31.9 °C21 September 1978	12.4 °C20 July 1978	20.5 °C	1,958 mm	15
1977	31.5 °C10 September 1977	13.1 °C23 June 1977	20.6 °C	1,936 mm	27
1976	32.1 °C13 September 1976	12.0 °C26 June 1976	20.1 °C	2,046 mm	7
1975	29.2 °C9 November 1975	11.7 °C5 August 1975	19.8 °C	1,945 mm	0
1974	31.1 °C7 September 1974	12.1 °C26 July 1974	20.0 °C	1,976 mm	21
1973	31.6 °C29 August 1973	12.5 °C9 July 1973	20.5 °C	1,858 mm	9
1972	31.3 °C20 September 1972	12.1 °C29 June 1972	20.0 °C	2,139 mm	7
1971	31.4 °C10 October 1971	12.0 °C12 June 1971	19.9 °C	1,981 mm	9
1970	32.8 °C8 October 1970	12.4 °C20 June 1970	20.5 °C	1,984 mm	28
1969	31.3 °C26 September 1969	12.8 °C24 June 1969	20.5 °C	1,776 mm	15
1968	32.4 °C5 October 1968	12.4 °C30 June 1968	20.2 °C	1,932 mm	25
1967	31.0 °C5 September 1967	12.6 °C12 July 1967	20.0 °C	2,111 mm	10
1966	31.0 °C6 October 1966	13.5 °C3 July 1966	20.2 °C	1,950 mm	11
1965	31.6 °C23 August 1965	12.5 °C20 June 1965	20.2 °C	1,790 mm	14
1964	30.4 °C29 September 1964	12.6 °C11 July 1964	20.1 °C	1,809 mm	2
1963	31.9 °C12 September 1963	13.7 °C5 August 1963	20.2 °C	1,875 mm	13
1962	30.5 °C4 October 1962	12.7 °C27 June 1962	19.8 °C	2,308 mm	3
1961	30.5 °C31 August 1961	11.3 °C13 June 1961	20.2 °C	2,182 mm	4
1960	30.5 °C21 September 1960	9.6 °C31 July 1960	20.6 °C	1,830 mm	4
1959	30.3 °C30 September 1959	11.9 °C6 June 1959	20.8 °C	1,986 mm	2
1958	30.5 °C1 November 1958	10.7 °C21 July 1958	20.8 °C	1,958 mm	6
1957	31.9 °C23 September 1957	11.4 °C11 July 1957	20.4 °C	2,206 mm	20
1956	30.8 °C15 September 1956	12.5 °C14 July 1956	19.9 °C	1,952 mm	10
1955	31.2 °C11 October 1955	12.6 °C14 June 1955	20.0 °C	1,746 mm	3
1954	31.5 °C14 October 1954	12.4 °C12 June 1954	20.4 °C	1,476 mm	17
1953	31.0 °C10 September 1953	11.9 °C6 July 1953	19.9 °C	2,192 mm	11
1952	31.0 °C30 August 1952	12.8 °C18 July 1952	20.2 °C	1,866 mm	12
1951	32.6 °C8 October 1951	12.6 °C15 June 1951	20.2 °C	1,948 mm	29
1950	31.1 °C15 September 1950	11.9 °C4 June 1950	19.8 °C	1,763 mm	9
1949	32.0 °C5 October 1949	12.3 °C29 July 1949	20.4 °C	1,647 mm	35
1948	32.0 °C20 September 1948	13.0 °C6 July 1948	20.4 °C	1,633 mm	14
1947	32.2 °C10 October 1947	13.4 °C18 August 1947	20.4 °C	1,510 mm	40
1946	30.9 °C25 August 1946	13.3 °C15 August 1946	20.2 °C	1,734 mm	12
1945	32.1 °C4 October 1945	12.2 °C9 June 1945	20.2 °C	1,590 mm	35
1944	33.2 °C20 September 1944	11.7 °C12 July 1944	20.5 °C	1,511 mm	43
1943	32.1 °C12 October 1943	10.8 °C26 May 1943	20.3 °C	1,326 mm	36
1942	32.8 °C8 October 1942	12.3 °C29 July 1942	20.5 °C	1,383 mm	56
1941	32.9 °C19 October 1941	13.2 °C10 July 1941	20.5 °C	1,622 mm	28
1940	30.8 °C28 August 1940	12.7 °C30 June 1940	19.9 °C	1,924 mm	10

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

27.0 °C

+1.0 °C

Hot days (≥ 30 °C)

34 d/yr

+14

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1482 mm

-246 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	25.9 °C	+1.2 °C	200 mm	-41 mm
Feb	26.9 °C	+1.7 °C	159 mm	-56 mm
Mar	26.6 °C	+1.5 °C	188 mm	-49 mm
Apr	26.2 °C	+1.3 °C	242 mm	+35 mm
May	26.0 °C	+0.6 °C	111 mm	+21 mm
Jun	26.9 °C	+0.7 °C	14 mm	-1 mm
Jul	27.5 °C	+0.5 °C	3 mm	-0 mm
Aug	28.0 °C	-0.4 °C	20 mm	+10 mm
Sep	30.1 °C	+1.1 °C	21 mm	-20 mm
Oct	28.3 °C	+1.0 °C	121 mm	-27 mm
Nov	26.5 °C	+1.7 °C	150 mm	-100 mm
Dec	25.2 °C	+0.8 °C	254 mm	-17 mm

The year's extremes

Hottest day

32.1 °C

14 Sep 2025

Coldest day

11.7 °C

16 Jun 2025

Wettest day

41.5 mm

7 Apr 2025

Windiest day

21.1 km/h

15 May 2025

Strongest gust

48.6 km/h

15 May 2025

Hottest feels-like

34.9 °C

14 Mar 2025

Coldest feels-like

11.4 °C

31 Jul 2025

Sunniest day

12.0 h

3 Jan 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 Kasulu?

Kasulu has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 20.7 °C and it receives 1,728 mm of precipitation per year.

What is the hottest day ever recorded in Kasulu?

The hottest day measured in Kasulu between 1940 and 2025 was 25 September 1997, reaching 34.4 °C.

What is the coldest day in Kasulu?

The coldest day measured in Kasulu between 1940 and 2025 was 31 July 1960, at 9.6 °C.

Does it snow in Kasulu?

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

Has the climate of Kasulu warmed?

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

What is the wettest day in Kasulu?

The wettest day measured in Kasulu between 1940 and 2025 was 17 December 1949, with 49 mm of rain in 24 hours.

What was the windiest day in Kasulu?

The windiest day measured in Kasulu between 1940 and 2025 was 23 October 2018, with winds reaching 23.8 km/h.

What is the warmest month in Kasulu?

The warmest month in Kasulu is September (22.7 °C on average); the coldest is December (19.9 °C).

How much does it rain in Kasulu?

Kasulu receives on average 1,728 mm of precipitation per year, spread over about 208 rainy days.

Is it sunny in Kasulu?

Kasulu gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Are there tropical nights in Kasulu?

Yes: Kasulu has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Kasulu?

In Kasulu, between 1940 and 2025, the highest apparent temperature reached 35.5 °C on 2 February 2010, and the lowest was 9.1 °C on 31 July 1960.

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