Kashan climate — normals and trends
Kashan (Iran) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 18.2 °C and it receives 189 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 (31.7 °C on average) and the coldest is January (4.3 °C). Rainfall peaks in March.
Kashan averages 31 frost days, 137 hot days (≥ 30 °C) and 40 rainy days per year.
Kashan has warmed by +2.9 °C between 1940 and 2025, or +0.34 °C per decade. This trend is statistically significant.
The number of frost days there went from about 45 to 17 per year over the period.
The hottest day of the period reached 45.2 °C (on 26 July 2013) and the coldest -19.5 °C (on 8 February 1950).
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
KashanIsfahan
- coords
- 33.98°, 51.43°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.2°C
Average daily high
23.9°C
Average daily low
12.6°C
Annual rainfall
189mm
Sunshine / day
11.0h
Mean relative humidity
39%
Average peak wind
13.5km/h
Seasonal range
27.4°C
Frost days (< 0 °C)
31 d/yr
Hot days (≥ 30 °C)
137 d/yr
Rainy days (≥ 1 mm)
40 d/yr
Annual snowfall
19.4 cm
Average feels-like high
21.4 °C
Average feels-like low
9.5 °C
Average peak gust
28.1 km/h
Tropical nights (≥ 20 °C)
104 d/yr
Solar radiation
20.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.53 · p = < 0.001
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
45.2 °C
26 July 2013
Coldest day
-19.5 °C
8 February 1950
Wettest day
49 mm
8 March 1986
Windiest day
43.3 km/h
7 April 1964
Strongest gust
91.1 km/h
7 April 1964
Hottest feels-like
42.6 °C
17 July 1995
Coldest feels-like
-25.7 °C
8 February 1950
Snowiest day
12.5 cm
6 January 2008
Sunniest day
13.2 h
3 July 1957
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?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 10.9 °C | +1.8 °C | 20 mm | -8 mm |
| Feb | 11.7 °C | -0.3 °C | 19 mm | -7 mm |
| Mar | 19.3 °C | +1.9 °C | 42 mm | +4 mm |
| Apr | 28.5 °C | +4.9 °C | 8 mm | -22 mm |
| May | 34.3 °C | +4.7 °C | 6 mm | -9 mm |
| Jun | 36.1 °C | +0.8 °C | 1 mm | -0 mm |
| Jul | 39.7 °C | +1.8 °C | 0 mm | -0 mm |
| Aug | 38.8 °C | +2.0 °C | 0 mm | -0 mm |
| Sep | 34.1 °C | +1.6 °C | 0 mm | -1 mm |
| Oct | 29.2 °C | +3.9 °C | 0 mm | -6 mm |
| Nov | 20.5 °C | +3.9 °C | 0 mm | -20 mm |
| Dec | 12.1 °C | +1.3 °C | 45 mm | +20 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Kashan?
Kashan has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 18.2 °C and it receives 189 mm of precipitation per year.
What is the hottest day ever recorded in Kashan?
The hottest day measured in Kashan between 1940 and 2025 was 26 July 2013, reaching 45.2 °C.
What is the coldest day in Kashan?
The coldest day measured in Kashan between 1940 and 2025 was 8 February 1950, at -19.5 °C.
Does it snow in Kashan?
Yes. Kashan gets on average 19.4 cm of snow per year and has around 31 frost days.
Has the climate of Kashan warmed?
Yes: Kashan warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kashan?
The wettest day measured in Kashan between 1940 and 2025 was 8 March 1986, with 49 mm of rain in 24 hours.
What was the windiest day in Kashan?
The windiest day measured in Kashan between 1940 and 2025 was 7 April 1964, with winds reaching 43.3 km/h.
What is the warmest month in Kashan?
The warmest month in Kashan is July (31.7 °C on average); the coldest is January (4.3 °C).
How much does it rain in Kashan?
Kashan receives on average 189 mm of precipitation per year, spread over about 40 rainy days.
Is it sunny in Kashan?
Kashan 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 Kashan?
The heaviest 24-hour snowfall measured in Kashan between 1940 and 2025 was 6 January 2008, with 12.5 cm.
Are there tropical nights in Kashan?
Yes: Kashan has on average 104 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kashan?
In Kashan, between 1940 and 2025, the highest apparent temperature reached 42.6 °C on 17 July 1995, and the lowest was -25.7 °C on 8 February 1950.
Compare Kashan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kashan