Mersa climate — normals and trends

Q: What is the climate of Mersa?

Mersa has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 20.9 °C and it receives 751 mm of precipitation per year.

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

The hottest day measured in Mersa between 1940 and 2025 was 24 May 1962, reaching 35.4 °C.

Q: What is the coldest day in Mersa?

The coldest day measured in Mersa between 1940 and 2025 was 9 January 1944, at 4.6 °C.

Q: Does it snow in Mersa?

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

Q: Has the climate of Mersa warmed?

Yes: Mersa warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Mersa?

The wettest day measured in Mersa between 1940 and 2025 was 2 May 1957, with 127 mm of rain in 24 hours.

Q: What was the windiest day in Mersa?

The windiest day measured in Mersa between 1940 and 2025 was 25 July 1972, with winds reaching 21.7 km/h.

Q: What is the warmest month in Mersa?

The warmest month in Mersa is June (24.2 °C on average); the coldest is January (17.8 °C).

Q: How much does it rain in Mersa?

Mersa receives on average 751 mm of precipitation per year, spread over about 97 rainy days.

Q: Is it sunny in Mersa?

Mersa gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.

Mersa (Ethiopia) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 20.9 °C and it receives 751 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 June (24.2 °C on average) and the coldest is January (17.8 °C). Rainfall peaks in March.

Mersa averages 0 frost days, 69 hot days (≥ 30 °C) and 97 rainy days per year.

Mersa has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.

The hottest day of the period reached 35.4 °C (on 24 May 1962) and the coldest 4.6 °C (on 9 January 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

MersaAmhara

coords: 11.67°, 39.65°
period: 1940–2025 · 86 yrs

CsaHot-summer MediterraneanWarmest monthJuneColdest monthJanuaryWettest monthMarchDriest monthJune

Mean daily temperature

20.9°C

Average daily high

26.9°C

Average daily low

14.9°C

Annual rainfall

751mm

Sunshine / day

10.9h

Mean relative humidity

52%

Average peak wind

10.9km/h

Seasonal range

6.4°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

69 d/yr

Rainy days (≥ 1 mm)

97 d/yr

Annual snowfall

0.0 cm

Average feels-like high

27.0 °C

Average feels-like low

14.3 °C

Average peak gust

33.7 km/h

Tropical nights (≥ 20 °C)

4 d/yr

Solar radiation

21.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.8 °C

since 1940

+0.3 °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

35.4 °C

24 May 1962

Coldest day

4.6 °C

9 January 1944

Wettest day

127 mm

2 May 1957

Windiest day

21.7 km/h

25 July 1972

Strongest gust

62.6 km/h

9 August 2005

Hottest feels-like

34.1 °C

23 May 2025

Coldest feels-like

1.3 °C

9 January 1944

Sunniest day

12.2 h

14 May 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	34.6 °C9 June 2025	9.9 °C22 November 2025	22.3 °C	341 mm	121
2024	34.3 °C31 May 2024	10.3 °C13 December 2024	22.2 °C	860 mm	78
2023	34.3 °C27 August 2023	7.5 °C4 January 2023	22.4 °C	562 mm	120
2022	34.0 °C14 June 2022	8.8 °C1 December 2022	22.1 °C	469 mm	101
2021	34.3 °C18 June 2021	8.6 °C10 December 2021	21.9 °C	432 mm	115
2020	33.1 °C15 May 2020	8.2 °C19 December 2020	21.9 °C	610 mm	82
2019	33.4 °C25 July 2019	7.2 °C8 January 2019	22.3 °C	479 mm	98
2018	34.4 °C27 May 2018	6.7 °C14 January 2018	22.0 °C	515 mm	102
2017	35.0 °C1 July 2017	5.5 °C7 January 2017	22.2 °C	420 mm	107
2016	34.5 °C12 June 2016	7.6 °C31 December 2016	22.0 °C	850 mm	101
2015	34.4 °C21 May 2015	7.9 °C2 January 2015	22.8 °C	298 mm	151
2014	33.1 °C18 June 2014	8.6 °C5 January 2014	21.8 °C	376 mm	78
2013	32.8 °C10 June 2013	6.8 °C22 December 2013	21.6 °C	625 mm	83
2012	33.5 °C15 June 2012	7.3 °C14 February 2012	21.8 °C	255 mm	78
2011	33.4 °C10 June 2011	7.1 °C6 February 2011	21.3 °C	359 mm	73
2010	33.2 °C2 June 2010	5.0 °C18 December 2010	21.3 °C	648 mm	68
2009	33.9 °C23 June 2009	8.5 °C6 January 2009	22.3 °C	350 mm	129
2008	33.9 °C28 May 2008	7.4 °C21 November 2008	21.9 °C	226 mm	125
2007	32.7 °C5 June 2007	7.5 °C18 November 2007	21.4 °C	500 mm	82
2006	33.4 °C31 May 2006	8.7 °C11 December 2006	21.8 °C	559 mm	78
2005	32.9 °C12 June 2005	7.3 °C3 January 2005	21.7 °C	604 mm	78
2004	33.5 °C31 July 2004	9.2 °C5 March 2004	21.5 °C	638 mm	101
2003	33.7 °C19 June 2003	6.4 °C13 January 2003	21.3 °C	636 mm	81
2002	33.8 °C8 July 2002	9.6 °C28 January 2002	21.9 °C	854 mm	120
2001	33.8 °C5 June 2001	7.0 °C4 February 2001	21.2 °C	510 mm	86
2000	33.4 °C20 May 2000	8.0 °C30 December 2000	21.5 °C	376 mm	98
1999	34.1 °C24 May 1999	7.2 °C2 January 1999	21.8 °C	338 mm	105
1998	33.8 °C6 June 1998	6.1 °C28 December 1998	21.7 °C	815 mm	85
1997	33.1 °C30 July 1997	8.2 °C9 February 1997	21.5 °C	727 mm	68
1996	34.3 °C4 August 1996	7.8 °C10 November 1996	21.3 °C	584 mm	74
1995	34.1 °C23 June 1995	8.4 °C10 November 1995	21.3 °C	984 mm	57
1994	33.5 °C2 June 1994	6.8 °C1 January 1994	21.4 °C	506 mm	65
1993	31.8 °C12 July 1993	7.9 °C2 March 1993	20.5 °C	728 mm	29
1992	33.3 °C15 June 1992	8.6 °C2 January 1992	20.4 °C	994 mm	50
1991	32.9 °C30 June 1991	8.2 °C14 December 1991	21.3 °C	570 mm	66
1990	32.9 °C10 June 1990	6.9 °C29 December 1990	20.5 °C	969 mm	47
1989	32.3 °C2 July 1989	7.2 °C4 January 1989	20.5 °C	1,137 mm	59
1988	33.0 °C11 June 1988	6.6 °C15 December 1988	21.1 °C	678 mm	59
1987	34.4 °C27 July 1987	5.6 °C2 February 1987	21.3 °C	844 mm	85
1986	32.8 °C19 July 1986	7.4 °C4 January 1986	21.0 °C	748 mm	53
1985	33.2 °C26 May 1985	7.5 °C14 December 1985	21.1 °C	673 mm	62
1984	33.6 °C9 July 1984	7.1 °C5 February 1984	21.6 °C	324 mm	109
1983	34.8 °C13 July 1983	6.1 °C11 January 1983	21.1 °C	817 mm	79
1982	34.3 °C13 June 1982	8.0 °C2 November 1982	20.6 °C	913 mm	64
1981	35.0 °C18 June 1981	6.4 °C12 December 1981	21.3 °C	774 mm	83
1980	34.0 °C15 June 1980	9.2 °C6 November 1980	21.8 °C	281 mm	114
1979	33.5 °C26 June 1979	9.4 °C29 November 1979	21.0 °C	1,082 mm	75
1978	34.8 °C2 June 1978	6.9 °C24 January 1978	21.0 °C	959 mm	67
1977	32.9 °C6 June 1977	8.2 °C27 November 1977	20.7 °C	1,034 mm	66
1976	34.1 °C5 June 1976	8.6 °C16 December 1976	20.7 °C	832 mm	51
1975	32.4 °C27 May 1975	7.1 °C28 November 1975	20.4 °C	753 mm	33
1974	31.6 °C17 June 1974	8.0 °C27 January 1974	20.1 °C	961 mm	26
1973	33.5 °C16 May 1973	6.8 °C7 December 1973	21.6 °C	328 mm	120
1972	33.0 °C19 June 1972	9.2 °C4 January 1972	20.8 °C	716 mm	63
1971	33.0 °C31 May 1971	6.9 °C4 December 1971	20.3 °C	651 mm	44
1970	34.6 °C9 June 1970	7.0 °C24 December 1970	21.2 °C	635 mm	88
1969	33.5 °C11 September 1969	7.4 °C13 December 1969	21.0 °C	825 mm	81
1968	32.8 °C29 June 1968	6.5 °C7 January 1968	20.3 °C	1,010 mm	34
1967	33.7 °C12 June 1967	7.3 °C3 January 1967	20.3 °C	972 mm	46
1966	34.0 °C26 July 1966	7.1 °C10 December 1966	21.2 °C	576 mm	109
1965	33.7 °C21 July 1965	6.9 °C14 February 1965	20.8 °C	533 mm	107
1964	33.2 °C6 July 1964	8.3 °C18 January 1964	21.1 °C	409 mm	104
1963	32.6 °C30 June 1963	9.5 °C10 March 1963	20.7 °C	835 mm	44
1962	35.4 °C24 May 1962	7.6 °C1 February 1962	20.9 °C	515 mm	112
1961	33.8 °C5 June 1961	8.4 °C1 January 1961	20.7 °C	864 mm	55
1960	33.9 °C11 August 1960	6.9 °C17 January 1960	20.8 °C	834 mm	69
1959	34.2 °C28 May 1959	8.6 °C9 December 1959	20.6 °C	708 mm	53
1958	33.3 °C10 June 1958	8.0 °C29 November 1958	21.1 °C	765 mm	77
1957	31.9 °C10 July 1957	7.9 °C26 December 1957	20.4 °C	1,142 mm	40
1956	31.9 °C5 July 1956	7.0 °C26 November 1956	20.1 °C	620 mm	54
1955	31.9 °C4 July 1955	7.5 °C1 March 1955	20.4 °C	580 mm	42
1954	31.8 °C1 June 1954	6.1 °C2 January 1954	19.8 °C	746 mm	19
1953	30.9 °C20 June 1953	7.7 °C30 December 1953	19.3 °C	1,329 mm	2
1952	30.5 °C11 July 1952	7.1 °C3 January 1952	19.3 °C	1,074 mm	1
1951	30.7 °C1 July 1951	5.6 °C27 January 1951	19.2 °C	1,558 mm	3
1950	28.6 °C16 June 1950	5.1 °C5 January 1950	17.9 °C	1,422 mm	0
1949	30.7 °C29 June 1949	7.4 °C5 November 1949	18.8 °C	1,805 mm	7
1948	30.7 °C9 July 1948	6.6 °C3 December 1948	18.9 °C	1,505 mm	8
1947	30.6 °C7 July 1947	6.7 °C22 December 1947	19.1 °C	1,930 mm	6
1946	32.3 °C4 June 1946	6.9 °C31 December 1946	20.2 °C	654 mm	51
1945	32.0 °C23 June 1945	7.0 °C12 November 1945	19.9 °C	600 mm	44
1944	31.6 °C15 June 1944	4.6 °C9 January 1944	20.1 °C	820 mm	30
1943	31.2 °C20 May 1943	6.3 °C23 December 1943	18.5 °C	1,032 mm	9
1942	31.8 °C24 May 1942	7.7 °C3 February 1942	19.9 °C	816 mm	50
1941	32.2 °C4 June 1941	5.6 °C18 January 1941	20.1 °C	922 mm	39
1940	31.2 °C18 June 1940	7.4 °C16 December 1940	19.6 °C	1,484 mm	28

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

28.5 °C

+1.6 °C

Hot days (≥ 30 °C)

121 d/yr

+52

Frost days (< 0 °C)

0 d/yr

Annual rainfall

341 mm

-410 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	25.9 °C	+2.2 °C	3 mm	-63 mm
Feb	28.0 °C	+3.4 °C	3 mm	-90 mm
Mar	27.9 °C	+2.0 °C	92 mm	-64 mm
Apr	30.0 °C	+3.2 °C	17 mm	-108 mm
May	31.6 °C	+2.7 °C	18 mm	-30 mm
Jun	32.9 °C	+2.1 °C	0 mm	-7 mm
Jul	31.4 °C	+2.0 °C	7 mm	-51 mm
Aug	27.8 °C	-0.5 °C	154 mm	+79 mm
Sep	28.6 °C	+0.3 °C	17 mm	-6 mm
Oct	27.3 °C	+0.5 °C	1 mm	-21 mm
Nov	26.2 °C	+0.8 °C	0 mm	-32 mm
Dec	24.7 °C	+0.6 °C	29 mm	-19 mm

The year's extremes

Hottest day

34.6 °C

9 Jun 2025

Coldest day

9.9 °C

22 Nov 2025

Wettest day

21.3 mm

20 Aug 2025

Windiest day

18.7 km/h

18 Jul 2025

Strongest gust

51.5 km/h

17 Jul 2025

Hottest feels-like

34.1 °C

23 May 2025

Coldest feels-like

7.7 °C

22 Nov 2025

Sunniest day

12.1 h

17 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 Mersa?

Mersa has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 20.9 °C and it receives 751 mm of precipitation per year.

What is the hottest day ever recorded in Mersa?

The hottest day measured in Mersa between 1940 and 2025 was 24 May 1962, reaching 35.4 °C.

What is the coldest day in Mersa?

The coldest day measured in Mersa between 1940 and 2025 was 9 January 1944, at 4.6 °C.

Does it snow in Mersa?

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

Has the climate of Mersa warmed?

Yes: Mersa warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Mersa?

The wettest day measured in Mersa between 1940 and 2025 was 2 May 1957, with 127 mm of rain in 24 hours.

What was the windiest day in Mersa?

The windiest day measured in Mersa between 1940 and 2025 was 25 July 1972, with winds reaching 21.7 km/h.

What is the warmest month in Mersa?

The warmest month in Mersa is June (24.2 °C on average); the coldest is January (17.8 °C).

How much does it rain in Mersa?

Mersa receives on average 751 mm of precipitation per year, spread over about 97 rainy days.

Is it sunny in Mersa?

Mersa gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.

Are there tropical nights in Mersa?

Yes: Mersa has on average 4 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Mersa?

In Mersa, between 1940 and 2025, the highest apparent temperature reached 34.1 °C on 23 May 2025, and the lowest was 1.3 °C on 9 January 1944.

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