Khomeyn climate — normals and trends
Khomeyn (Iran) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 11.4 °C and it receives 216 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 (25.8 °C on average) and the coldest is January (-3.7 °C). Rainfall peaks in March.
Khomeyn averages 119 frost days, 76 hot days (≥ 30 °C) and 49 rainy days per year.
Khomeyn has warmed by +3.4 °C between 1940 and 2025, or +0.40 °C per decade. This trend is statistically significant.
The number of frost days there went from about 141 to 97 per year over the period.
The hottest day of the period reached 39.8 °C (on 25 July 2013) and the coldest -28.7 °C (on 7 January 1942).
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
KhomeynMarkazi
- coords
- 33.64°, 50.08°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.4°C
Average daily high
18.1°C
Average daily low
5.2°C
Annual rainfall
216mm
Sunshine / day
11.0h
Mean relative humidity
45%
Average peak wind
15.8km/h
Seasonal range
29.5°C
Frost days (< 0 °C)
119 d/yr
Hot days (≥ 30 °C)
76 d/yr
Rainy days (≥ 1 mm)
49 d/yr
Annual snowfall
55.2 cm
Average feels-like high
14.8 °C
Average feels-like low
1.8 °C
Average peak gust
37.0 km/h
Tropical nights (≥ 20 °C)
8 d/yr
Solar radiation
20.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.4 °C
since 1940
+0.4 °C per decade · r² = 0.49 · 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
39.8 °C
25 July 2013
Coldest day
-28.7 °C
7 January 1942
Wettest day
40 mm
31 March 2009
Windiest day
48.5 km/h
7 April 1964
Strongest gust
107.6 km/h
7 April 1964
Hottest feels-like
37.8 °C
17 July 2013
Coldest feels-like
-33.6 °C
7 January 1942
Snowiest day
27.0 cm
31 March 2009
Sunniest day
13.5 h
24 June 1940
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 | 6.3 °C | +4.1 °C | 22 mm | -5 mm |
| Feb | 5.7 °C | +1.1 °C | 32 mm | +3 mm |
| Mar | 13.8 °C | +3.8 °C | 46 mm | +7 mm |
| Apr | 20.6 °C | +4.3 °C | 30 mm | -6 mm |
| May | 28.1 °C | +5.5 °C | 6 mm | -15 mm |
| Jun | 32.0 °C | +2.3 °C | 3 mm | -0 mm |
| Jul | 34.6 °C | +1.6 °C | 3 mm | +1 mm |
| Aug | 34.2 °C | +2.3 °C | 0 mm | -1 mm |
| Sep | 30.0 °C | +2.1 °C | 0 mm | -1 mm |
| Oct | 24.8 °C | +4.3 °C | 0 mm | -9 mm |
| Nov | 17.0 °C | +4.7 °C | 1 mm | -21 mm |
| Dec | 7.4 °C | +1.8 °C | 42 mm | +15 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 Khomeyn?
Khomeyn has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 11.4 °C and it receives 216 mm of precipitation per year.
What is the hottest day ever recorded in Khomeyn?
The hottest day measured in Khomeyn between 1940 and 2025 was 25 July 2013, reaching 39.8 °C.
What is the coldest day in Khomeyn?
The coldest day measured in Khomeyn between 1940 and 2025 was 7 January 1942, at -28.7 °C.
Does it snow in Khomeyn?
Yes. Khomeyn gets on average 55.2 cm of snow per year and has around 119 frost days.
Has the climate of Khomeyn warmed?
Yes: Khomeyn warmed by +3.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Khomeyn?
The wettest day measured in Khomeyn between 1940 and 2025 was 31 March 2009, with 40 mm of rain in 24 hours.
What was the windiest day in Khomeyn?
The windiest day measured in Khomeyn between 1940 and 2025 was 7 April 1964, with winds reaching 48.5 km/h.
What is the warmest month in Khomeyn?
The warmest month in Khomeyn is July (25.8 °C on average); the coldest is January (-3.7 °C).
How much does it rain in Khomeyn?
Khomeyn receives on average 216 mm of precipitation per year, spread over about 49 rainy days.
Is it sunny in Khomeyn?
Khomeyn 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 Khomeyn?
The heaviest 24-hour snowfall measured in Khomeyn between 1940 and 2025 was 31 March 2009, with 27.0 cm.
Are there tropical nights in Khomeyn?
Yes: Khomeyn has on average 8 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Khomeyn?
In Khomeyn, between 1940 and 2025, the highest apparent temperature reached 37.8 °C on 17 July 2013, and the lowest was -33.6 °C on 7 January 1942.
Compare Khomeyn with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Khomeyn