Dehāqān climate — normals and trends

Q: What is the climate of Dehāqān?

Dehāqān has a cold desert climate (Köppen BWk). Over 1940-2025, the average annual temperature is 13.4 °C and it receives 121 mm of precipitation per year.

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

The hottest day measured in Dehāqān between 1940 and 2025 was 2 July 2025, reaching 40.2 °C.

Q: What is the coldest day in Dehāqān?

The coldest day measured in Dehāqān between 1940 and 2025 was 11 January 1949, at -22.4 °C.

Q: Does it snow in Dehāqān?

Yes. Dehāqān gets on average 25.5 cm of snow per year and has around 105 frost days.

Q: Has the climate of Dehāqān warmed?

Yes: Dehāqān warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Dehāqān?

The wettest day measured in Dehāqān between 1940 and 2025 was 20 December 1986, with 45 mm of rain in 24 hours.

Q: What was the windiest day in Dehāqān?

The windiest day measured in Dehāqān between 1940 and 2025 was 19 April 1973, with winds reaching 51.9 km/h.

Q: What is the warmest month in Dehāqān?

The warmest month in Dehāqān is July (26.7 °C on average); the coldest is January (-0.8 °C).

Q: How much does it rain in Dehāqān?

Dehāqān receives on average 121 mm of precipitation per year, spread over about 27 rainy days.

Q: Is it sunny in Dehāqān?

Dehāqān gets on average 11.1 hours of sunshine per day, roughly 4,052 hours per year over 1940-2025.

Dehāqān (Iran) has a cold desert climate (BWk) under the Köppen-Geiger classification. Its mean annual temperature is 13.4 °C and it receives 121 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 (26.7 °C on average) and the coldest is January (-0.8 °C). Rainfall peaks in March.

Dehāqān averages 105 frost days, 87 hot days (≥ 30 °C) and 27 rainy days per year.

Dehāqān has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.

The number of frost days there went from about 119 to 91 per year over the period.

The hottest day of the period reached 40.2 °C (on 2 July 2025) and the coldest -22.4 °C (on 11 January 1949).

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

DehāqānIsfahan

coords: 31.94°, 51.65°
period: 1940–2025 · 86 yrs

BWkCold desertWarmest monthJulyColdest monthJanuaryWettest monthMarchDriest monthAugust

Mean daily temperature

13.4°C

Average daily high

20.2°C

Average daily low

6.5°C

Annual rainfall

121mm

Sunshine / day

11.1h

Mean relative humidity

38%

Average peak wind

15.7km/h

Seasonal range

27.5°C

Frost days (< 0 °C)

105 d/yr

Hot days (≥ 30 °C)

87 d/yr

Rainy days (≥ 1 mm)

27 d/yr

Annual snowfall

25.5 cm

Average feels-like high

17.1 °C

Average feels-like low

2.9 °C

Average peak gust

34.7 km/h

Tropical nights (≥ 20 °C)

20 d/yr

Solar radiation

21.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.4 °C

since 1940

+0.3 °C per decade · r² = 0.47 · 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

40.2 °C

2 July 2025

Coldest day

-22.4 °C

11 January 1949

Wettest day

45 mm

20 December 1986

Windiest day

51.9 km/h

19 April 1973

Strongest gust

113.8 km/h

26 March 2003

Hottest feels-like

38.6 °C

10 July 1991

Coldest feels-like

-28.0 °C

11 January 1949

Snowiest day

18.4 cm

20 December 1986

Sunniest day

13.0 h

23 June 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	40.2 °C2 July 2025	-12.0 °C22 December 2025	15.7 °C	126 mm	127	83
2024	39.7 °C11 August 2024	-9.3 °C16 December 2024	15.6 °C	205 mm	118	89
2023	38.2 °C28 June 2023	-15.3 °C13 January 2023	15.1 °C	193 mm	110	83
2022	38.9 °C2 July 2022	-12.8 °C22 January 2022	15.2 °C	142 mm	97	84
2021	38.0 °C13 June 2021	-10.4 °C23 January 2021	15.5 °C	136 mm	121	96
2020	38.3 °C14 August 2020	-10.3 °C12 February 2020	14.5 °C	133 mm	98	89
2019	38.2 °C6 July 2019	-11.2 °C20 January 2019	14.6 °C	181 mm	113	106
2018	36.6 °C25 June 2018	-12.9 °C30 January 2018	15.2 °C	175 mm	111	77
2017	37.4 °C21 June 2017	-12.2 °C4 February 2017	15.0 °C	43 mm	102	96
2016	37.6 °C2 July 2016	-10.9 °C25 November 2016	15.1 °C	66 mm	105	88
2015	36.7 °C30 June 2015	-12.0 °C21 January 2015	14.9 °C	122 mm	92	93
2014	37.4 °C28 July 2014	-17.3 °C10 January 2014	13.9 °C	132 mm	99	110
2013	38.0 °C24 July 2013	-12.6 °C12 January 2013	14.6 °C	146 mm	103	85
2012	38.3 °C12 July 2012	-14.2 °C22 January 2012	13.8 °C	135 mm	86	93
2011	37.0 °C1 July 2011	-10.6 °C4 February 2011	14.4 °C	77 mm	107	108
2010	38.3 °C19 July 2010	-9.8 °C8 February 2010	15.3 °C	48 mm	94	84
2009	37.5 °C21 July 2009	-9.8 °C5 January 2009	14.1 °C	145 mm	81	97
2008	36.5 °C11 July 2008	-21.7 °C17 January 2008	14.2 °C	55 mm	101	103
2007	36.5 °C15 June 2007	-14.5 °C19 January 2007	13.7 °C	123 mm	90	102
2006	38.3 °C3 August 2006	-14.9 °C31 December 2006	13.9 °C	194 mm	86	101
2005	37.4 °C17 July 2005	-16.9 °C13 January 2005	13.9 °C	119 mm	94	100
2004	36.6 °C10 August 2004	-17.0 °C29 December 2004	13.6 °C	238 mm	93	91
2003	37.7 °C10 July 2003	-10.1 °C26 January 2003	14.5 °C	104 mm	103	88
2002	36.6 °C19 July 2002	-10.1 °C13 January 2002	14.4 °C	106 mm	105	84
2001	37.7 °C14 July 2001	-14.3 °C30 January 2001	14.8 °C	104 mm	98	78
2000	36.1 °C12 July 2000	-15.3 °C24 January 2000	13.8 °C	101 mm	100	105
1999	37.1 °C4 July 1999	-11.1 °C7 February 1999	14.1 °C	139 mm	103	97
1998	37.7 °C11 July 1998	-18.6 °C15 January 1998	13.8 °C	142 mm	81	89
1997	37.9 °C19 July 1997	-12.1 °C8 February 1997	13.3 °C	114 mm	81	110
1996	34.1 °C23 June 1996	-19.2 °C15 January 1996	13.0 °C	142 mm	81	98
1995	37.7 °C17 July 1995	-9.7 °C14 December 1995	13.5 °C	128 mm	87	102
1994	37.4 °C26 July 1994	-11.5 °C21 February 1994	13.7 °C	118 mm	88	97
1993	35.2 °C15 July 1993	-22.1 °C16 January 1993	13.0 °C	159 mm	86	98
1992	36.0 °C4 July 1992	-16.1 °C6 January 1992	11.8 °C	91 mm	61	118
1991	38.3 °C10 July 1991	-11.1 °C14 February 1991	13.7 °C	110 mm	96	82
1990	35.6 °C29 June 1990	-17.7 °C12 January 1990	13.8 °C	61 mm	108	104
1989	36.4 °C1 July 1989	-17.7 °C16 January 1989	12.2 °C	164 mm	101	123
1988	36.9 °C25 July 1988	-15.8 °C20 January 1988	13.3 °C	107 mm	80	103
1987	34.9 °C20 July 1987	-14.5 °C4 January 1987	13.1 °C	86 mm	82	120
1986	34.9 °C28 June 1986	-13.1 °C13 December 1986	12.0 °C	228 mm	55	130
1985	36.5 °C26 July 1985	-11.9 °C8 January 1985	13.0 °C	83 mm	67	105
1984	34.7 °C17 August 1984	-16.0 °C1 February 1984	12.4 °C	105 mm	76	116
1983	36.6 °C26 July 1983	-21.0 °C29 January 1983	12.5 °C	101 mm	97	120
1982	35.6 °C8 August 1982	-15.7 °C19 February 1982	12.3 °C	78 mm	71	135
1981	35.6 °C19 July 1981	-12.1 °C15 January 1981	13.1 °C	64 mm	56	107
1980	35.4 °C8 June 1980	-12.4 °C20 January 1980	13.3 °C	102 mm	90	109
1979	36.2 °C9 July 1979	-14.2 °C12 January 1979	13.0 °C	129 mm	76	116
1978	36.3 °C30 June 1978	-13.1 °C16 January 1978	13.8 °C	93 mm	80	102
1977	37.7 °C15 July 1977	-19.6 °C14 January 1977	13.9 °C	162 mm	90	91
1976	36.5 °C14 July 1976	-16.2 °C3 January 1976	12.8 °C	167 mm	87	109
1975	36.3 °C17 July 1975	-18.7 °C30 January 1975	12.5 °C	149 mm	82	121
1974	35.5 °C21 June 1974	-17.1 °C26 January 1974	12.3 °C	167 mm	86	104
1973	37.6 °C13 July 1973	-17.8 °C20 January 1973	13.8 °C	52 mm	91	111
1972	37.1 °C4 July 1972	-19.6 °C3 February 1972	11.4 °C	177 mm	66	123
1971	36.2 °C6 July 1971	-20.6 °C3 February 1971	13.2 °C	109 mm	91	102
1970	37.2 °C10 August 1970	-15.3 °C31 January 1970	13.9 °C	123 mm	106	94
1969	36.6 °C23 July 1969	-16.4 °C3 February 1969	13.4 °C	124 mm	67	101
1968	36.2 °C6 July 1968	-19.4 °C27 January 1968	12.9 °C	118 mm	74	96
1967	36.8 °C14 July 1967	-13.7 °C6 January 1967	12.4 °C	107 mm	78	131
1966	36.9 °C24 July 1966	-11.9 °C23 December 1966	14.1 °C	95 mm	90	94
1965	35.8 °C29 July 1965	-19.1 °C19 January 1965	12.9 °C	108 mm	73	111
1964	36.5 °C11 July 1964	-21.5 °C20 January 1964	12.3 °C	62 mm	93	111
1963	35.5 °C18 July 1963	-21.1 °C28 December 1963	13.7 °C	90 mm	88	100
1962	34.6 °C4 July 1962	-12.2 °C25 January 1962	13.1 °C	73 mm	52	105
1961	36.3 °C11 July 1961	-15.3 °C4 February 1961	12.5 °C	159 mm	71	124
1960	36.8 °C8 July 1960	-11.8 °C30 January 1960	13.6 °C	105 mm	83	113
1959	36.5 °C10 August 1959	-17.3 °C3 December 1959	13.0 °C	98 mm	88	130
1958	36.1 °C24 July 1958	-11.1 °C7 February 1958	14.1 °C	57 mm	83	95
1957	34.3 °C20 June 1957	-19.2 °C7 February 1957	11.3 °C	144 mm	56	120
1956	36.1 °C12 July 1956	-17.6 °C24 December 1956	12.5 °C	81 mm	73	118
1955	36.6 °C16 July 1955	-11.3 °C15 December 1955	13.0 °C	78 mm	77	102
1954	34.5 °C24 July 1954	-11.9 °C7 January 1954	12.3 °C	237 mm	47	115
1953	35.4 °C6 July 1953	-17.9 °C23 December 1953	12.3 °C	259 mm	78	118
1952	35.3 °C7 July 1952	-17.3 °C13 January 1952	12.4 °C	138 mm	56	122
1951	35.8 °C10 July 1951	-21.1 °C9 February 1951	12.7 °C	156 mm	94	112
1950	36.9 °C27 July 1950	-21.1 °C29 January 1950	12.5 °C	156 mm	85	111
1949	35.1 °C2 July 1949	-22.4 °C11 January 1949	11.4 °C	167 mm	78	123
1948	34.6 °C14 July 1948	-12.1 °C22 December 1948	12.8 °C	87 mm	77	125
1947	36.4 °C17 August 1947	-12.8 °C18 January 1947	13.2 °C	124 mm	88	103
1946	34.4 °C11 June 1946	-11.9 °C24 December 1946	12.8 °C	67 mm	67	119
1945	35.4 °C26 June 1945	-17.1 °C8 January 1945	12.4 °C	89 mm	93	122
1944	36.8 °C10 July 1944	-19.2 °C31 December 1944	13.2 °C	78 mm	91	104
1943	35.3 °C6 July 1943	-18.9 °C4 January 1943	12.7 °C	89 mm	86	126
1942	35.7 °C2 July 1942	-21.6 °C25 December 1942	13.8 °C	127 mm	87	96
1941	36.3 °C18 July 1941	-9.8 °C23 January 1941	13.9 °C	95 mm	94	118
1940	35.9 °C30 June 1940	-11.3 °C3 February 1940	13.3 °C	46 mm	66	120

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

23.1 °C

+2.9 °C

Hot days (≥ 30 °C)

127 d/yr

+40

Frost days (< 0 °C)

83 d/yr

-22

Annual rainfall

126 mm

+5 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	8.1 °C	+2.2 °C	24 mm	+4 mm
Feb	10.7 °C	+2.1 °C	4 mm	-13 mm
Mar	16.2 °C	+2.7 °C	30 mm	+10 mm
Apr	24.4 °C	+5.2 °C	5 mm	-12 mm
May	30.4 °C	+5.2 °C	4 mm	-5 mm
Jun	33.8 °C	+2.6 °C	1 mm	+0 mm
Jul	35.5 °C	+2.3 °C	0 mm	-1 mm
Aug	33.6 °C	+1.7 °C	0 mm	-0 mm
Sep	31.4 °C	+2.8 °C	0 mm	-0 mm
Oct	26.1 °C	+4.0 °C	0 mm	-3 mm
Nov	17.9 °C	+3.6 °C	1 mm	-13 mm
Dec	9.0 °C	+0.5 °C	56 mm	+37 mm

The year's extremes

Hottest day

40.2 °C

2 Jul 2025

Coldest day

-12.0 °C

22 Dec 2025

Wettest day

18.3 mm

19 Dec 2025

Windiest day

38.8 km/h

15 Apr 2025

Strongest gust

86.0 km/h

12 Apr 2025

Hottest feels-like

38.6 °C

4 Jul 2025

Coldest feels-like

-17.1 °C

22 Dec 2025

Snowiest day

12.8 cm

19 Dec 2025

Sunniest day

13.0 h

23 Jun 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 Dehāqān?

Dehāqān has a cold desert climate (Köppen BWk). Over 1940-2025, the average annual temperature is 13.4 °C and it receives 121 mm of precipitation per year.

What is the hottest day ever recorded in Dehāqān?

The hottest day measured in Dehāqān between 1940 and 2025 was 2 July 2025, reaching 40.2 °C.

What is the coldest day in Dehāqān?

The coldest day measured in Dehāqān between 1940 and 2025 was 11 January 1949, at -22.4 °C.

Does it snow in Dehāqān?

Yes. Dehāqān gets on average 25.5 cm of snow per year and has around 105 frost days.

Has the climate of Dehāqān warmed?

Yes: Dehāqān warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Dehāqān?

The wettest day measured in Dehāqān between 1940 and 2025 was 20 December 1986, with 45 mm of rain in 24 hours.

What was the windiest day in Dehāqān?

The windiest day measured in Dehāqān between 1940 and 2025 was 19 April 1973, with winds reaching 51.9 km/h.

What is the warmest month in Dehāqān?

The warmest month in Dehāqān is July (26.7 °C on average); the coldest is January (-0.8 °C).

How much does it rain in Dehāqān?

Dehāqān receives on average 121 mm of precipitation per year, spread over about 27 rainy days.

Is it sunny in Dehāqān?

Dehāqān gets on average 11.1 hours of sunshine per day, roughly 4,052 hours per year over 1940-2025.

What is the biggest single-day snowfall in Dehāqān?

The heaviest 24-hour snowfall measured in Dehāqān between 1940 and 2025 was 20 December 1986, with 18.4 cm.

Are there tropical nights in Dehāqān?

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

What was the most extreme apparent temperature in Dehāqān?

In Dehāqān, between 1940 and 2025, the highest apparent temperature reached 38.6 °C on 10 July 1991, and the lowest was -28.0 °C on 11 January 1949.

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