Merelani climate — normals and trends

Q: What is the climate of Merelani?

Merelani has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 21.9 °C and it receives 724 mm of precipitation per year.

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

The hottest day measured in Merelani between 1940 and 2025 was 26 March 1941, reaching 37.1 °C.

Q: What is the coldest day in Merelani?

The coldest day measured in Merelani between 1940 and 2025 was 11 July 1944, at 7.2 °C.

Q: Does it snow in Merelani?

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

Q: Has the climate of Merelani warmed?

Yes: Merelani warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Merelani?

The wettest day measured in Merelani between 1940 and 2025 was 27 April 2019, with 152 mm of rain in 24 hours.

Q: What was the windiest day in Merelani?

The windiest day measured in Merelani between 1940 and 2025 was 13 November 1952, with winds reaching 23.8 km/h.

Q: What is the warmest month in Merelani?

The warmest month in Merelani is February (24.4 °C on average); the coldest is July (18.5 °C).

Q: How much does it rain in Merelani?

Merelani receives on average 724 mm of precipitation per year, spread over about 143 rainy days.

Q: Is it sunny in Merelani?

Merelani gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.

Merelani (Tanzania) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 21.9 °C and it receives 724 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 (18.5 °C). Rainfall peaks in April.

Merelani averages 0 frost days, 89 hot days (≥ 30 °C) and 143 rainy days per year.

Merelani has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.

The hottest day of the period reached 37.1 °C (on 26 March 1941) and the coldest 7.2 °C (on 11 July 1944).

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

MerelaniArusha

coords: -3.56°, 36.98°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthFebruaryColdest monthJulyWettest monthAprilDriest monthSeptember

Mean daily temperature

21.9°C

Average daily high

27.6°C

Average daily low

17.2°C

Annual rainfall

724mm

Sunshine / day

10.8h

Mean relative humidity

67%

Average peak wind

11.5km/h

Seasonal range

5.9°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

89 d/yr

Rainy days (≥ 1 mm)

143 d/yr

Annual snowfall

0.0 cm

Average feels-like high

29.0 °C

Average feels-like low

18.1 °C

Average peak gust

28.4 km/h

Tropical nights (≥ 20 °C)

29 d/yr

Solar radiation

19.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.3 °C

since 1940

+0.2 °C per decade · r² = 0.42 · 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

37.1 °C

26 March 1941

Coldest day

7.2 °C

11 July 1944

Wettest day

152 mm

27 April 2019

Windiest day

23.8 km/h

13 November 1952

Strongest gust

50.0 km/h

18 October 1953

Hottest feels-like

38.8 °C

21 March 2016

Coldest feels-like

4.4 °C

11 July 1944

Sunniest day

12.2 h

28 December 2023

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	34.8 °C28 February 2025	11.3 °C4 August 2025	22.4 °C	701 mm	126
2024	35.8 °C18 February 2024	11.2 °C25 June 2024	22.9 °C	762 mm	101
2023	34.5 °C5 February 2023	12.1 °C20 July 2023	22.9 °C	698 mm	109
2022	34.2 °C13 January 2022	12.6 °C21 July 2022	22.7 °C	401 mm	124
2021	34.0 °C24 November 2021	11.6 °C31 July 2021	22.5 °C	493 mm	124
2020	32.9 °C6 October 2020	10.0 °C17 July 2020	22.3 °C	1,143 mm	75
2019	35.2 °C1 March 2019	11.4 °C23 July 2019	22.8 °C	1,062 mm	114
2018	35.0 °C26 February 2018	10.7 °C17 July 2018	22.3 °C	857 mm	101
2017	34.0 °C19 January 2017	12.2 °C10 July 2017	23.0 °C	573 mm	154
2016	35.9 °C28 March 2016	10.7 °C9 July 2016	22.6 °C	628 mm	136
2015	35.2 °C28 February 2015	11.6 °C22 June 2015	22.8 °C	677 mm	125
2014	34.0 °C3 February 2014	10.2 °C29 June 2014	22.4 °C	757 mm	105
2013	35.6 °C19 February 2013	11.5 °C15 July 2013	22.5 °C	662 mm	122
2012	35.9 °C22 January 2012	12.5 °C13 August 2012	23.1 °C	448 mm	159
2011	34.5 °C8 February 2011	11.3 °C11 July 2011	22.7 °C	655 mm	122
2010	34.5 °C2 February 2010	11.0 °C4 July 2010	22.3 °C	717 mm	108
2009	34.7 °C1 January 2009	12.0 °C6 July 2009	22.9 °C	410 mm	142
2008	33.9 °C7 January 2008	9.5 °C9 July 2008	22.1 °C	617 mm	127
2007	35.1 °C23 February 2007	9.6 °C20 June 2007	22.4 °C	542 mm	113
2006	34.8 °C22 February 2006	11.6 °C3 July 2006	22.3 °C	760 mm	86
2005	36.0 °C22 February 2005	12.0 °C5 July 2005	22.9 °C	430 mm	145
2004	34.1 °C28 January 2004	11.3 °C6 July 2004	22.5 °C	522 mm	105
2003	34.5 °C17 March 2003	9.8 °C9 July 2003	22.7 °C	444 mm	151
2002	33.3 °C10 January 2002	12.0 °C27 June 2002	21.9 °C	714 mm	61
2001	33.0 °C4 March 2001	10.1 °C13 July 2001	21.9 °C	484 mm	88
2000	36.5 °C22 February 2000	10.6 °C9 July 2000	22.1 °C	473 mm	111
1999	34.9 °C10 February 1999	9.7 °C5 July 1999	21.6 °C	664 mm	90
1998	32.4 °C23 December 1998	10.3 °C1 July 1998	21.6 °C	1,032 mm	56
1997	34.7 °C28 January 1997	11.5 °C14 July 1997	22.2 °C	964 mm	85
1996	33.8 °C27 January 1996	9.3 °C5 August 1996	21.9 °C	700 mm	117
1995	33.8 °C6 February 1995	10.3 °C3 July 1995	21.9 °C	681 mm	73
1994	35.9 °C1 February 1994	10.5 °C12 June 1994	22.1 °C	747 mm	99
1993	34.4 °C13 November 1993	10.0 °C24 July 1993	22.0 °C	429 mm	84
1992	33.5 °C4 February 1992	8.5 °C1 August 1992	21.7 °C	739 mm	84
1991	33.6 °C20 March 1991	10.4 °C21 July 1991	21.7 °C	792 mm	76
1990	33.4 °C16 February 1990	9.7 °C27 June 1990	21.3 °C	741 mm	40
1989	34.7 °C27 February 1989	9.3 °C1 July 1989	21.3 °C	865 mm	45
1988	34.6 °C26 January 1988	12.5 °C6 July 1988	22.3 °C	586 mm	99
1987	34.8 °C28 December 1987	11.6 °C23 June 1987	22.3 °C	858 mm	119
1986	33.1 °C10 February 1986	8.6 °C20 July 1986	21.5 °C	1,089 mm	57
1985	33.3 °C31 January 1985	9.2 °C8 June 1985	21.5 °C	788 mm	56
1984	34.5 °C16 February 1984	10.1 °C8 June 1984	21.6 °C	782 mm	84
1983	34.4 °C23 February 1983	11.2 °C20 July 1983	22.4 °C	632 mm	123
1982	35.3 °C25 February 1982	10.2 °C18 July 1982	22.0 °C	751 mm	93
1981	34.1 °C23 February 1981	9.6 °C25 July 1981	21.8 °C	786 mm	102
1980	34.0 °C22 January 1980	9.8 °C25 July 1980	21.7 °C	818 mm	101
1979	33.1 °C28 November 1979	9.6 °C31 July 1979	21.1 °C	958 mm	57
1978	32.0 °C5 February 1978	9.6 °C9 July 1978	21.1 °C	1,089 mm	39
1977	33.3 °C11 February 1977	11.8 °C6 July 1977	22.0 °C	938 mm	66
1976	33.5 °C26 January 1976	11.5 °C27 June 1976	21.9 °C	741 mm	110
1975	34.7 °C22 February 1975	11.2 °C29 July 1975	21.8 °C	554 mm	102
1974	33.2 °C20 March 1974	9.6 °C30 July 1974	21.5 °C	713 mm	88
1973	33.4 °C15 March 1973	9.5 °C9 July 1973	21.6 °C	714 mm	91
1972	33.2 °C31 January 1972	9.0 °C28 June 1972	21.3 °C	1,132 mm	38
1971	33.6 °C4 March 1971	9.9 °C9 July 1971	21.1 °C	839 mm	86
1970	33.1 °C1 December 1970	10.1 °C17 July 1970	21.4 °C	675 mm	61
1969	33.0 °C25 October 1969	9.9 °C22 August 1969	21.6 °C	466 mm	77
1968	33.7 °C13 January 1968	9.6 °C3 August 1968	20.8 °C	1,295 mm	44
1967	33.3 °C19 February 1967	10.2 °C27 August 1967	21.6 °C	487 mm	95
1966	33.4 °C15 February 1966	10.2 °C27 July 1966	21.7 °C	707 mm	83
1965	33.8 °C26 February 1965	11.0 °C11 July 1965	21.3 °C	720 mm	58
1964	32.2 °C21 February 1964	8.2 °C23 July 1964	20.9 °C	933 mm	39
1963	32.4 °C20 February 1963	9.1 °C28 July 1963	21.0 °C	887 mm	44
1962	31.3 °C4 November 1962	10.8 °C27 July 1962	21.1 °C	741 mm	15
1961	33.4 °C31 January 1961	12.0 °C5 July 1961	21.7 °C	1,094 mm	71
1960	31.9 °C29 November 1960	9.1 °C25 July 1960	21.2 °C	982 mm	55
1959	33.5 °C12 February 1959	11.0 °C17 July 1959	21.6 °C	819 mm	65
1958	33.5 °C2 February 1958	10.6 °C23 July 1958	21.6 °C	763 mm	72
1957	33.6 °C22 January 1957	10.4 °C4 July 1957	21.2 °C	1,188 mm	34
1956	32.5 °C22 September 1956	9.8 °C13 July 1956	21.4 °C	641 mm	53
1955	32.3 °C2 March 1955	10.1 °C15 July 1955	21.5 °C	647 mm	92
1954	32.7 °C26 December 1954	9.9 °C1 July 1954	21.6 °C	602 mm	52
1953	31.8 °C4 November 1953	9.4 °C21 July 1953	20.9 °C	1,221 mm	12
1952	33.5 °C24 March 1952	10.6 °C18 July 1952	21.6 °C	594 mm	78
1951	32.3 °C26 January 1951	9.9 °C19 July 1951	21.4 °C	1,054 mm	51
1950	33.6 °C16 January 1950	8.9 °C2 June 1950	21.6 °C	577 mm	107
1949	33.5 °C10 March 1949	10.6 °C30 July 1949	22.0 °C	524 mm	120
1948	32.0 °C23 September 1948	10.4 °C15 July 1948	21.7 °C	629 mm	47
1947	33.1 °C18 February 1947	9.1 °C27 June 1947	21.1 °C	756 mm	52
1946	35.3 °C19 March 1946	11.3 °C14 August 1946	22.7 °C	275 mm	143
1945	33.2 °C28 January 1945	10.0 °C30 July 1945	21.4 °C	618 mm	84
1944	34.7 °C21 February 1944	7.2 °C11 July 1944	22.1 °C	466 mm	120
1943	34.0 °C11 January 1943	10.3 °C27 July 1943	22.3 °C	247 mm	146
1942	33.6 °C2 February 1942	9.9 °C28 July 1942	22.0 °C	387 mm	115
1941	37.1 °C26 March 1941	10.2 °C2 July 1941	21.6 °C	1,016 mm	86
1940	32.8 °C2 January 1940	11.2 °C29 June 1940	22.1 °C	503 mm	78

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

28.0 °C

+0.4 °C

Hot days (≥ 30 °C)

126 d/yr

+37

Frost days (< 0 °C)

0 d/yr

Annual rainfall

701 mm

-23 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.3 °C	+0.2 °C	60 mm	-6 mm
Feb	31.9 °C	+1.2 °C	6 mm	-51 mm
Mar	29.5 °C	-0.5 °C	200 mm	+83 mm
Apr	27.2 °C	-0.1 °C	168 mm	+4 mm
May	25.4 °C	+0.3 °C	64 mm	-22 mm
Jun	24.2 °C	0.0 °C	33 mm	+10 mm
Jul	23.6 °C	-0.3 °C	18 mm	-1 mm
Aug	25.2 °C	+0.2 °C	16 mm	+1 mm
Sep	28.9 °C	+1.8 °C	3 mm	-9 mm
Oct	29.0 °C	+0.1 °C	28 mm	+7 mm
Nov	31.0 °C	+1.8 °C	19 mm	-41 mm
Dec	30.5 °C	+1.2 °C	86 mm	+2 mm

The year's extremes

Hottest day

34.8 °C

28 Feb 2025

Coldest day

11.3 °C

4 Aug 2025

Wettest day

57.7 mm

30 Mar 2025

Windiest day

18.9 km/h

8 Nov 2025

Strongest gust

40.7 km/h

26 Nov 2025

Hottest feels-like

36.7 °C

25 Feb 2025

Coldest feels-like

10.2 °C

4 Aug 2025

Sunniest day

12.1 h

23 Dec 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 Merelani?

Merelani has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 21.9 °C and it receives 724 mm of precipitation per year.

What is the hottest day ever recorded in Merelani?

The hottest day measured in Merelani between 1940 and 2025 was 26 March 1941, reaching 37.1 °C.

What is the coldest day in Merelani?

The coldest day measured in Merelani between 1940 and 2025 was 11 July 1944, at 7.2 °C.

Does it snow in Merelani?

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

Has the climate of Merelani warmed?

Yes: Merelani warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Merelani?

The wettest day measured in Merelani between 1940 and 2025 was 27 April 2019, with 152 mm of rain in 24 hours.

What was the windiest day in Merelani?

The windiest day measured in Merelani between 1940 and 2025 was 13 November 1952, with winds reaching 23.8 km/h.

What is the warmest month in Merelani?

The warmest month in Merelani is February (24.4 °C on average); the coldest is July (18.5 °C).

How much does it rain in Merelani?

Merelani receives on average 724 mm of precipitation per year, spread over about 143 rainy days.

Is it sunny in Merelani?

Merelani gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.

Are there tropical nights in Merelani?

Yes: Merelani has on average 29 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Merelani?

In Merelani, between 1940 and 2025, the highest apparent temperature reached 38.8 °C on 21 March 2016, and the lowest was 4.4 °C on 11 July 1944.

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