Assab climate — normals and trends

Q: What is the climate of Assab?

Assab has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 28.8 °C and it receives 139 mm of precipitation per year.

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

The hottest day measured in Assab between 1940 and 2025 was 29 June 2024, reaching 37.5 °C.

Q: What is the coldest day in Assab?

The coldest day measured in Assab between 1940 and 2025 was 12 January 1941, at 20.2 °C.

Q: Does it snow in Assab?

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

Q: Has the climate of Assab warmed?

Yes: Assab warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Assab?

The wettest day measured in Assab between 1940 and 2025 was 31 August 1943, with 122 mm of rain in 24 hours.

Q: What was the windiest day in Assab?

The windiest day measured in Assab between 1940 and 2025 was 28 January 2019, with winds reaching 55.3 km/h.

Q: What is the warmest month in Assab?

The warmest month in Assab is July (32.2 °C on average); the coldest is January (25.0 °C).

Q: How much does it rain in Assab?

Assab receives on average 139 mm of precipitation per year, spread over about 18 rainy days.

Q: Is it sunny in Assab?

Assab gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.

Assab (Eritrea) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 28.8 °C and it receives 139 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 July (32.2 °C on average) and the coldest is January (25.0 °C). Rainfall peaks in August.

Assab averages 0 frost days, 229 hot days (≥ 30 °C) and 18 rainy days per year.

Assab has warmed by +1.2 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.

The hottest day of the period reached 37.5 °C (on 29 June 2024) and the coldest 20.2 °C (on 12 January 1941).

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

AssabSouthern Red Sea Region

coords: 13.01°, 42.74°
period: 1940–2025 · 86 yrs

BWhHot desertWarmest monthJulyColdest monthJanuaryWettest monthAugustDriest monthNovember

Mean daily temperature

28.8°C

Average daily high

31.2°C

Average daily low

26.9°C

Annual rainfall

139mm

Sunshine / day

11.0h

Mean relative humidity

68%

Average peak wind

31.3km/h

Seasonal range

7.2°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

229 d/yr

Rainy days (≥ 1 mm)

18 d/yr

Annual snowfall

0.0 cm

Average feels-like high

33.4 °C

Average feels-like low

28.7 °C

Average peak gust

43.7 km/h

Tropical nights (≥ 20 °C)

365 d/yr

Solar radiation

21.7 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.2 °C

since 1940

+0.2 °C per decade · r² = 0.58 · 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

37.5 °C

29 June 2024

Coldest day

20.2 °C

12 January 1941

Wettest day

122 mm

31 August 1943

Windiest day

55.3 km/h

28 January 2019

Strongest gust

79.9 km/h

28 January 2019

Hottest feels-like

44.2 °C

7 August 2006

Coldest feels-like

18.1 °C

4 February 1971

Sunniest day

12.0 h

10 April 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	37.0 °C25 July 2025	22.0 °C18 January 2025	29.3 °C	67 mm	241
2024	37.5 °C29 June 2024	23.1 °C21 December 2024	30.0 °C	115 mm	275
2023	37.4 °C22 July 2023	21.6 °C2 February 2023	29.9 °C	13 mm	255
2022	36.7 °C21 July 2022	22.0 °C22 January 2022	29.3 °C	93 mm	244
2021	36.1 °C3 September 2021	21.3 °C30 January 2021	29.3 °C	41 mm	251
2020	36.4 °C29 August 2020	22.3 °C19 January 2020	29.1 °C	96 mm	236
2019	36.9 °C1 August 2019	21.2 °C8 January 2019	29.4 °C	35 mm	245
2018	35.7 °C13 August 2018	20.9 °C14 January 2018	29.1 °C	14 mm	251
2017	37.1 °C20 July 2017	21.7 °C24 December 2017	29.5 °C	5 mm	252
2016	36.3 °C5 July 2016	21.9 °C8 February 2016	29.5 °C	90 mm	262
2015	36.3 °C21 August 2015	21.5 °C1 February 2015	29.3 °C	33 mm	248
2014	36.2 °C18 August 2014	21.1 °C24 December 2014	29.0 °C	40 mm	235
2013	36.4 °C25 July 2013	21.8 °C20 February 2013	29.1 °C	33 mm	240
2012	36.2 °C5 August 2012	21.0 °C14 January 2012	28.9 °C	11 mm	224
2011	36.0 °C6 August 2011	21.2 °C2 March 2011	28.8 °C	35 mm	216
2010	36.3 °C14 August 2010	21.5 °C11 January 2010	29.2 °C	41 mm	252
2009	36.2 °C8 July 2009	20.8 °C3 January 2009	28.9 °C	31 mm	221
2008	35.8 °C30 July 2008	21.2 °C15 March 2008	28.7 °C	18 mm	222
2007	37.4 °C27 June 2007	21.7 °C7 January 2007	29.3 °C	61 mm	237
2006	36.9 °C31 July 2006	21.8 °C12 February 2006	29.2 °C	91 mm	234
2005	36.7 °C23 July 2005	20.7 °C2 January 2005	29.4 °C	74 mm	244
2004	36.4 °C8 August 2004	22.4 °C22 February 2004	29.4 °C	29 mm	252
2003	35.9 °C23 August 2003	21.4 °C9 January 2003	29.3 °C	91 mm	245
2002	36.3 °C17 August 2002	22.5 °C30 January 2002	29.2 °C	57 mm	239
2001	36.6 °C6 July 2001	20.3 °C4 February 2001	29.2 °C	80 mm	239
2000	36.7 °C10 July 2000	21.1 °C6 February 2000	29.1 °C	72 mm	237
1999	36.0 °C24 August 1999	21.4 °C27 December 1999	29.3 °C	57 mm	245
1998	36.9 °C12 August 1998	23.0 °C17 December 1998	29.6 °C	152 mm	250
1997	36.4 °C26 June 1997	22.0 °C10 February 1997	29.1 °C	45 mm	231
1996	35.9 °C18 July 1996	22.0 °C19 December 1996	29.1 °C	43 mm	235
1995	35.7 °C9 August 1995	22.1 °C26 January 1995	29.1 °C	51 mm	233
1994	35.9 °C22 May 1994	21.4 °C24 January 1994	28.8 °C	156 mm	236
1993	36.4 °C24 August 1993	21.1 °C11 January 1993	29.0 °C	70 mm	231
1992	36.1 °C30 August 1992	22.2 °C2 January 1992	28.7 °C	51 mm	220
1991	36.1 °C24 July 1991	21.4 °C5 February 1991	29.0 °C	8 mm	232
1990	37.0 °C3 July 1990	21.6 °C28 December 1990	29.2 °C	41 mm	232
1989	35.3 °C28 July 1989	21.3 °C29 January 1989	28.7 °C	100 mm	220
1988	36.2 °C11 September 1988	22.4 °C8 December 1988	29.0 °C	209 mm	234
1987	35.9 °C10 August 1987	20.8 °C18 January 1987	29.1 °C	69 mm	234
1986	35.6 °C4 August 1986	21.6 °C12 January 1986	28.7 °C	62 mm	232
1985	36.4 °C4 August 1985	21.4 °C22 February 1985	28.9 °C	97 mm	236
1984	35.9 °C16 July 1984	21.7 °C9 February 1984	28.7 °C	53 mm	213
1983	35.8 °C20 July 1983	22.3 °C18 December 1983	29.1 °C	59 mm	220
1982	35.9 °C4 July 1982	22.5 °C1 February 1982	28.9 °C	91 mm	224
1981	36.6 °C6 August 1981	21.8 °C6 January 1981	29.1 °C	27 mm	229
1980	36.0 °C12 August 1980	22.4 °C16 January 1980	29.2 °C	30 mm	241
1979	36.3 °C3 August 1979	21.8 °C1 December 1979	29.0 °C	48 mm	243
1978	36.0 °C6 July 1978	21.3 °C26 January 1978	28.9 °C	236 mm	229
1977	35.4 °C16 June 1977	21.3 °C30 December 1977	28.7 °C	246 mm	222
1976	35.0 °C20 August 1976	21.8 °C15 February 1976	28.5 °C	52 mm	227
1975	35.6 °C26 June 1975	20.6 °C12 January 1975	28.6 °C	193 mm	219
1974	35.8 °C3 July 1974	21.7 °C31 January 1974	28.7 °C	157 mm	224
1973	36.5 °C10 July 1973	21.8 °C17 December 1973	28.9 °C	89 mm	234
1972	36.0 °C15 July 1972	21.3 °C1 January 1972	28.8 °C	38 mm	234
1971	35.6 °C30 June 1971	20.8 °C8 February 1971	28.5 °C	243 mm	218
1970	36.5 °C4 July 1970	21.6 °C20 December 1970	28.9 °C	92 mm	226
1969	36.7 °C16 August 1969	21.8 °C5 February 1969	29.3 °C	33 mm	244
1968	35.9 °C24 June 1968	21.0 °C7 January 1968	28.5 °C	81 mm	222
1967	36.2 °C16 August 1967	21.4 °C25 December 1967	28.5 °C	62 mm	213
1966	37.0 °C21 August 1966	21.1 °C13 December 1966	28.8 °C	18 mm	223
1965	36.4 °C27 July 1965	20.4 °C4 January 1965	28.3 °C	143 mm	210
1964	36.3 °C13 July 1964	20.5 °C26 December 1964	28.8 °C	46 mm	233
1963	36.6 °C21 June 1963	22.3 °C12 February 1963	29.0 °C	36 mm	222
1962	36.8 °C10 July 1962	21.8 °C28 January 1962	28.8 °C	89 mm	234
1961	36.1 °C22 August 1961	22.1 °C24 January 1961	28.8 °C	86 mm	218
1960	36.8 °C1 July 1960	21.6 °C27 January 1960	28.8 °C	140 mm	228
1959	35.4 °C11 August 1959	21.6 °C9 January 1959	28.5 °C	108 mm	221
1958	36.6 °C24 August 1958	21.9 °C18 February 1958	29.0 °C	97 mm	235
1957	36.1 °C1 August 1957	20.9 °C31 January 1957	28.4 °C	127 mm	215
1956	35.6 °C3 July 1956	21.2 °C10 February 1956	28.2 °C	189 mm	215
1955	35.6 °C18 July 1955	21.6 °C4 March 1955	28.5 °C	224 mm	218
1954	35.2 °C9 June 1954	21.5 °C26 December 1954	28.3 °C	416 mm	217
1953	35.8 °C8 July 1953	20.7 °C14 January 1953	27.7 °C	751 mm	180
1952	35.7 °C25 July 1952	21.5 °C10 January 1952	28.1 °C	451 mm	213
1951	35.2 °C4 July 1951	20.9 °C25 January 1951	28.0 °C	400 mm	208
1950	34.4 °C17 June 1950	21.3 °C26 January 1950	27.0 °C	1,253 mm	144
1949	35.8 °C10 July 1949	20.9 °C30 January 1949	27.9 °C	578 mm	194
1948	35.9 °C19 July 1948	20.4 °C25 January 1948	28.4 °C	341 mm	216
1947	36.1 °C14 July 1947	21.4 °C2 February 1947	28.3 °C	290 mm	206
1946	35.4 °C29 July 1946	21.8 °C20 February 1946	28.4 °C	168 mm	222
1945	35.7 °C4 September 1945	22.4 °C22 January 1945	28.6 °C	68 mm	223
1944	35.2 °C13 June 1944	21.3 °C10 February 1944	28.6 °C	86 mm	226
1943	34.6 °C11 August 1943	21.8 °C22 December 1943	27.7 °C	936 mm	193
1942	36.0 °C24 June 1942	21.5 °C25 January 1942	28.6 °C	272 mm	231
1941	35.9 °C14 August 1941	20.2 °C12 January 1941	28.8 °C	67 mm	235
1940	35.7 °C28 June 1940	21.5 °C10 January 1940	28.4 °C	221 mm	215

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

31.7 °C

+0.5 °C

Hot days (≥ 30 °C)

241 d/yr

+12

Frost days (< 0 °C)

0 d/yr

Annual rainfall

67 mm

-72 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	27.9 °C	+0.5 °C	2 mm	-4 mm
Feb	28.5 °C	+0.7 °C	1 mm	-6 mm
Mar	29.8 °C	+0.6 °C	4 mm	-3 mm
Apr	32.0 °C	+0.8 °C	0 mm	-3 mm
May	33.1 °C	+0.5 °C	0 mm	-4 mm
Jun	33.8 °C	+0.1 °C	0 mm	-5 mm
Jul	35.4 °C	+1.1 °C	1 mm	-26 mm
Aug	34.0 °C	0.0 °C	54 mm	+12 mm
Sep	34.5 °C	+0.9 °C	1 mm	-27 mm
Oct	33.1 °C	+1.0 °C	0 mm	-3 mm
Nov	30.2 °C	+0.3 °C	0 mm	-2 mm
Dec	27.9 °C	-0.2 °C	4 mm	-1 mm

The year's extremes

Hottest day

37.0 °C

25 Jul 2025

Coldest day

22.0 °C

18 Jan 2025

Wettest day

30.9 mm

19 Aug 2025

Windiest day

53.8 km/h

4 Mar 2025

Strongest gust

77.4 km/h

4 Mar 2025

Hottest feels-like

42.5 °C

15 Aug 2025

Coldest feels-like

19.4 °C

6 Feb 2025

Sunniest day

12.0 h

10 Apr 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 Assab?

Assab has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 28.8 °C and it receives 139 mm of precipitation per year.

What is the hottest day ever recorded in Assab?

The hottest day measured in Assab between 1940 and 2025 was 29 June 2024, reaching 37.5 °C.

What is the coldest day in Assab?

The coldest day measured in Assab between 1940 and 2025 was 12 January 1941, at 20.2 °C.

Does it snow in Assab?

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

Has the climate of Assab warmed?

Yes: Assab warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Assab?

The wettest day measured in Assab between 1940 and 2025 was 31 August 1943, with 122 mm of rain in 24 hours.

What was the windiest day in Assab?

The windiest day measured in Assab between 1940 and 2025 was 28 January 2019, with winds reaching 55.3 km/h.

What is the warmest month in Assab?

The warmest month in Assab is July (32.2 °C on average); the coldest is January (25.0 °C).

How much does it rain in Assab?

Assab receives on average 139 mm of precipitation per year, spread over about 18 rainy days.

Is it sunny in Assab?

Assab gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.

Are there tropical nights in Assab?

Yes: Assab has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Assab?

In Assab, between 1940 and 2025, the highest apparent temperature reached 44.2 °C on 7 August 2006, and the lowest was 18.1 °C on 4 February 1971.

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