Arzew climate — normals and trends

Q: What is the climate of Arzew?

Arzew has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 18.9 °C and it receives 372 mm of precipitation per year.

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

The hottest day measured in Arzew between 1940 and 2025 was 31 July 2001, reaching 41.9 °C.

Q: What is the coldest day in Arzew?

The coldest day measured in Arzew between 1940 and 2025 was 27 January 2005, at 1.7 °C.

Q: Does it snow in Arzew?

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

Q: Has the climate of Arzew warmed?

Yes: Arzew warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Arzew?

The wettest day measured in Arzew between 1940 and 2025 was 13 April 1967, with 74 mm of rain in 24 hours.

Q: What was the windiest day in Arzew?

The windiest day measured in Arzew between 1940 and 2025 was 10 January 1987, with winds reaching 55.3 km/h.

Q: What is the warmest month in Arzew?

The warmest month in Arzew is August (26.6 °C on average); the coldest is January (12.5 °C).

Q: How much does it rain in Arzew?

Arzew receives on average 372 mm of precipitation per year, spread over about 63 rainy days.

Q: Is it sunny in Arzew?

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

Arzew (Algeria) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 18.9 °C and it receives 372 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 August (26.6 °C on average) and the coldest is January (12.5 °C). Rainfall peaks in December.

Arzew averages 0 frost days, 37 hot days (≥ 30 °C) and 63 rainy days per year.

Arzew has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.

The hottest day of the period reached 41.9 °C (on 31 July 2001) and the coldest 1.7 °C (on 27 January 2005).

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

ArzewOran Province

coords: 35.85°, -0.32°
period: 1940–2025 · 86 yrs

BShHot semi-aridWarmest monthAugustColdest monthJanuaryWettest monthDecemberDriest monthJuly

Mean daily temperature

18.9°C

Average daily high

22.1°C

Average daily low

15.8°C

Annual rainfall

372mm

Sunshine / day

11.0h

Mean relative humidity

72%

Average peak wind

16.9km/h

Seasonal range

14.1°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

37 d/yr

Rainy days (≥ 1 mm)

63 d/yr

Annual snowfall

0.2 cm

Average feels-like high

22.4 °C

Average feels-like low

15.5 °C

Average peak gust

35.8 km/h

Tropical nights (≥ 20 °C)

98 d/yr

Solar radiation

18.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.8 °C

since 1940

+0.2 °C per decade · r² = 0.59 · 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

41.9 °C

31 July 2001

Coldest day

1.7 °C

27 January 2005

Wettest day

74 mm

13 April 1967

Windiest day

55.3 km/h

10 January 1987

Strongest gust

121.7 km/h

1 December 1959

Hottest feels-like

44.0 °C

31 July 2001

Coldest feels-like

-2.9 °C

21 December 1979

Snowiest day

4.2 cm

21 December 1979

Sunniest day

14.0 h

18 May 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	38.1 °C18 August 2025	6.9 °C14 January 2025	20.7 °C	310 mm	75
2024	36.0 °C20 July 2024	8.4 °C18 December 2024	20.8 °C	186 mm	58
2023	37.5 °C17 July 2023	5.2 °C24 January 2023	20.5 °C	223 mm	59
2022	38.1 °C13 August 2022	5.1 °C22 January 2022	20.5 °C	283 mm	72
2021	37.1 °C16 August 2021	7.8 °C14 January 2021	19.9 °C	299 mm	42
2020	37.3 °C2 August 2020	6.4 °C27 December 2020	19.9 °C	261 mm	57
2019	34.6 °C6 July 2019	5.2 °C12 January 2019	19.4 °C	337 mm	34
2018	34.3 °C25 August 2018	6.9 °C6 February 2018	19.3 °C	461 mm	49
2017	36.9 °C25 June 2017	5.7 °C19 January 2017	19.9 °C	297 mm	60
2016	37.0 °C31 July 2016	6.8 °C27 February 2016	19.9 °C	337 mm	45
2015	35.6 °C12 August 2015	4.2 °C3 January 2015	19.8 °C	283 mm	67
2014	37.6 °C6 June 2014	7.5 °C3 February 2014	19.9 °C	380 mm	45
2013	34.6 °C7 August 2013	6.3 °C30 November 2013	19.0 °C	436 mm	32
2012	38.3 °C17 August 2012	3.1 °C13 February 2012	19.2 °C	436 mm	55
2011	34.6 °C1 August 2011	5.8 °C1 February 2011	19.7 °C	388 mm	45
2010	36.4 °C27 August 2010	5.2 °C17 December 2010	19.6 °C	400 mm	48
2009	37.7 °C22 July 2009	7.5 °C10 January 2009	19.7 °C	339 mm	46
2008	35.3 °C4 September 2008	5.4 °C7 March 2008	19.2 °C	379 mm	45
2007	38.0 °C28 August 2007	6.7 °C17 December 2007	18.9 °C	400 mm	22
2006	35.0 °C19 July 2006	6.7 °C14 January 2006	19.6 °C	381 mm	47
2005	34.9 °C17 July 2005	1.7 °C27 January 2005	18.7 °C	216 mm	34
2004	35.0 °C24 August 2004	4.6 °C2 March 2004	19.1 °C	369 mm	49
2003	35.0 °C22 August 2003	5.7 °C2 February 2003	19.6 °C	389 mm	60
2002	36.2 °C26 June 2002	6.9 °C2 February 2002	19.2 °C	267 mm	18
2001	41.9 °C31 July 2001	7.3 °C19 February 2001	19.7 °C	336 mm	48
2000	34.1 °C19 August 2000	6.5 °C3 January 2000	19.3 °C	254 mm	36
1999	38.6 °C25 August 1999	3.9 °C16 December 1999	19.5 °C	358 mm	48
1998	35.9 °C31 August 1998	7.1 °C1 December 1998	19.3 °C	191 mm	34
1997	31.6 °C2 August 1997	7.8 °C12 January 1997	19.6 °C	300 mm	10
1996	34.2 °C23 July 1996	5.8 °C22 February 1996	18.9 °C	393 mm	18
1995	34.4 °C14 August 1995	6.8 °C16 January 1995	19.4 °C	321 mm	31
1994	37.3 °C4 July 1994	6.0 °C4 February 1994	19.6 °C	244 mm	57
1993	34.7 °C8 August 1993	3.8 °C1 March 1993	18.6 °C	270 mm	25
1992	33.5 °C6 August 1992	6.5 °C10 February 1992	18.5 °C	324 mm	30
1991	34.9 °C16 August 1991	5.4 °C15 January 1991	18.5 °C	324 mm	47
1990	35.8 °C29 September 1990	7.7 °C16 January 1990	19.5 °C	316 mm	52
1989	37.8 °C10 August 1989	6.7 °C4 January 1989	19.6 °C	260 mm	46
1988	36.6 °C2 August 1988	5.4 °C27 February 1988	19.1 °C	217 mm	36
1987	34.4 °C25 September 1987	4.8 °C19 January 1987	19.2 °C	322 mm	28
1986	36.3 °C22 August 1986	5.4 °C25 December 1986	18.6 °C	378 mm	33
1985	33.3 °C2 October 1985	3.4 °C15 January 1985	18.8 °C	420 mm	24
1984	34.3 °C10 July 1984	5.0 °C26 February 1984	18.1 °C	400 mm	19
1983	32.7 °C10 September 1983	4.1 °C11 February 1983	18.8 °C	234 mm	13
1982	34.0 °C14 August 1982	6.6 °C30 January 1982	18.7 °C	445 mm	21
1981	33.5 °C30 July 1981	4.8 °C14 January 1981	18.5 °C	320 mm	13
1980	34.6 °C20 August 1980	2.7 °C16 March 1980	18.4 °C	403 mm	26
1979	35.2 °C30 July 1979	4.4 °C21 December 1979	18.3 °C	497 mm	21
1978	36.6 °C18 July 1978	4.4 °C14 January 1978	18.4 °C	421 mm	19
1977	30.4 °C17 August 1977	6.6 °C1 April 1977	18.6 °C	335 mm	2
1976	37.0 °C10 July 1976	4.9 °C29 January 1976	18.2 °C	536 mm	25
1975	35.2 °C9 August 1975	5.1 °C9 January 1975	18.2 °C	489 mm	39
1974	34.2 °C7 August 1974	5.6 °C24 January 1974	18.0 °C	481 mm	26
1973	33.8 °C15 August 1973	5.1 °C3 February 1973	18.0 °C	553 mm	28
1972	31.8 °C31 July 1972	7.7 °C24 December 1972	17.9 °C	712 mm	9
1971	36.9 °C16 August 1971	5.8 °C2 March 1971	18.2 °C	745 mm	27
1970	36.1 °C7 August 1970	5.6 °C18 December 1970	18.7 °C	296 mm	30
1969	35.1 °C1 August 1969	6.0 °C3 January 1969	18.4 °C	599 mm	16
1968	35.6 °C9 July 1968	6.3 °C23 January 1968	18.9 °C	452 mm	35
1967	35.7 °C22 July 1967	3.6 °C14 December 1967	18.8 °C	523 mm	40
1966	32.9 °C5 August 1966	5.4 °C26 December 1966	18.7 °C	295 mm	30
1965	32.6 °C22 June 1965	4.9 °C21 February 1965	18.7 °C	364 mm	29
1964	37.2 °C16 September 1964	5.3 °C11 February 1964	18.5 °C	378 mm	48
1963	32.9 °C10 August 1963	5.2 °C29 January 1963	18.2 °C	449 mm	22
1962	35.1 °C14 August 1962	5.8 °C1 February 1962	18.6 °C	437 mm	41
1961	36.0 °C18 September 1961	5.5 °C19 December 1961	19.2 °C	223 mm	35
1960	33.7 °C27 July 1960	4.6 °C9 February 1960	18.6 °C	342 mm	33
1959	38.4 °C13 July 1959	5.1 °C6 January 1959	18.5 °C	400 mm	22
1958	35.4 °C10 May 1958	5.6 °C13 March 1958	18.4 °C	354 mm	22
1957	35.5 °C5 August 1957	4.3 °C17 January 1957	18.0 °C	394 mm	26
1956	37.0 °C8 September 1956	2.6 °C4 February 1956	17.6 °C	398 mm	35
1955	36.6 °C27 August 1955	5.6 °C12 March 1955	19.1 °C	437 mm	42
1954	35.1 °C28 July 1954	2.3 °C2 February 1954	18.0 °C	406 mm	27
1953	35.4 °C26 July 1953	3.1 °C16 February 1953	18.1 °C	346 mm	36
1952	38.1 °C28 August 1952	4.2 °C7 February 1952	18.5 °C	389 mm	35
1951	32.7 °C22 July 1951	4.6 °C3 February 1951	17.9 °C	417 mm	24
1950	37.2 °C22 August 1950	6.3 °C31 December 1950	18.7 °C	426 mm	45
1949	34.9 °C4 September 1949	5.1 °C4 February 1949	18.5 °C	441 mm	45
1948	36.1 °C17 August 1948	7.3 °C2 January 1948	18.5 °C	400 mm	36
1947	35.2 °C22 July 1947	5.7 °C14 December 1947	19.2 °C	431 mm	62
1946	37.6 °C5 August 1946	6.4 °C16 January 1946	18.4 °C	486 mm	47
1945	38.5 °C3 September 1945	3.2 °C3 January 1945	19.1 °C	247 mm	59
1944	38.5 °C1 August 1944	3.5 °C15 February 1944	18.1 °C	202 mm	42
1943	37.9 °C16 July 1943	6.0 °C17 February 1943	18.4 °C	494 mm	56
1942	36.2 °C18 July 1942	5.4 °C18 February 1942	18.5 °C	490 mm	51
1941	37.0 °C28 August 1941	4.9 °C7 January 1941	18.2 °C	298 mm	55
1940	35.5 °C13 August 1940	3.8 °C26 December 1940	18.0 °C	318 mm	41

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

23.8 °C

+1.7 °C

Hot days (≥ 30 °C)

75 d/yr

+38

Frost days (< 0 °C)

0 d/yr

Annual rainfall

310 mm

-62 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	17.0 °C	+1.6 °C	48 mm	-2 mm
Feb	17.7 °C	+1.7 °C	35 mm	-9 mm
Mar	19.6 °C	+1.9 °C	41 mm	-2 mm
Apr	21.3 °C	+1.7 °C	26 mm	-14 mm
May	24.4 °C	+1.7 °C	41 mm	+13 mm
Jun	29.6 °C	+3.3 °C	0 mm	-9 mm
Jul	30.9 °C	+1.3 °C	2 mm	+1 mm
Aug	31.6 °C	+1.3 °C	0 mm	-3 mm
Sep	28.4 °C	+0.6 °C	8 mm	-7 mm
Oct	26.2 °C	+2.2 °C	11 mm	-22 mm
Nov	21.0 °C	+1.4 °C	13 mm	-38 mm
Dec	16.9 °C	+0.4 °C	85 mm	+29 mm

The year's extremes

Hottest day

38.1 °C

18 Aug 2025

Coldest day

6.9 °C

14 Jan 2025

Wettest day

25.2 mm

20 Dec 2025

Windiest day

37.1 km/h

28 Jan 2025

Strongest gust

75.6 km/h

28 Jan 2025

Hottest feels-like

40.6 °C

18 Aug 2025

Coldest feels-like

4.9 °C

14 Jan 2025

Sunniest day

14.0 h

18 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 Arzew?

Arzew has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 18.9 °C and it receives 372 mm of precipitation per year.

What is the hottest day ever recorded in Arzew?

The hottest day measured in Arzew between 1940 and 2025 was 31 July 2001, reaching 41.9 °C.

What is the coldest day in Arzew?

The coldest day measured in Arzew between 1940 and 2025 was 27 January 2005, at 1.7 °C.

Does it snow in Arzew?

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

Has the climate of Arzew warmed?

Yes: Arzew warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Arzew?

The wettest day measured in Arzew between 1940 and 2025 was 13 April 1967, with 74 mm of rain in 24 hours.

What was the windiest day in Arzew?

The windiest day measured in Arzew between 1940 and 2025 was 10 January 1987, with winds reaching 55.3 km/h.

What is the warmest month in Arzew?

The warmest month in Arzew is August (26.6 °C on average); the coldest is January (12.5 °C).

How much does it rain in Arzew?

Arzew receives on average 372 mm of precipitation per year, spread over about 63 rainy days.

Is it sunny in Arzew?

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

What is the biggest single-day snowfall in Arzew?

The heaviest 24-hour snowfall measured in Arzew between 1940 and 2025 was 21 December 1979, with 4.2 cm.

Are there tropical nights in Arzew?

Yes: Arzew has on average 98 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Arzew?

In Arzew, between 1940 and 2025, the highest apparent temperature reached 44.0 °C on 31 July 2001, and the lowest was -2.9 °C on 21 December 1979.

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