Delījān climate — normals and trends
Delījān (Iran) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 13.2 °C and it receives 250 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 (26.8 °C on average) and the coldest is January (-1.1 °C). Rainfall peaks in March.
Delījān averages 90 frost days, 78 hot days (≥ 30 °C) and 61 rainy days per year.
Delījān 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 111 to 69 per year over the period.
The hottest day of the period reached 39.5 °C (on 26 July 2013) and the coldest -23.1 °C (on 20 January 1964).
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
DelījānMarkazi
- coords
- 33.99°, 50.68°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.2°C
Average daily high
18.8°C
Average daily low
7.7°C
Annual rainfall
250mm
Sunshine / day
11.0h
Mean relative humidity
42%
Average peak wind
13.2km/h
Seasonal range
27.9°C
Frost days (< 0 °C)
90 d/yr
Hot days (≥ 30 °C)
78 d/yr
Rainy days (≥ 1 mm)
61 d/yr
Annual snowfall
54.6 cm
Average feels-like high
15.8 °C
Average feels-like low
4.6 °C
Average peak gust
35.9 km/h
Tropical nights (≥ 20 °C)
30 d/yr
Solar radiation
20.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.49 · 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
39.5 °C
26 July 2013
Coldest day
-23.1 °C
20 January 1964
Wettest day
43 mm
31 March 2009
Windiest day
43.0 km/h
7 April 1964
Strongest gust
113.4 km/h
18 April 1958
Hottest feels-like
38.6 °C
16 July 1995
Coldest feels-like
-27.9 °C
20 January 1964
Snowiest day
20.4 cm
31 March 2009
Sunniest day
13.4 h
25 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 | 6.1 °C | +2.3 °C | 31 mm | +1 mm |
| Feb | 5.9 °C | -0.3 °C | 32 mm | +2 mm |
| Mar | 14.2 °C | +2.7 °C | 42 mm | -2 mm |
| Apr | 22.3 °C | +4.7 °C | 18 mm | -24 mm |
| May | 28.7 °C | +5.1 °C | 14 mm | -17 mm |
| Jun | 31.4 °C | +1.2 °C | 8 mm | +4 mm |
| Jul | 34.4 °C | +1.5 °C | 2 mm | +0 mm |
| Aug | 33.9 °C | +2.1 °C | 0 mm | -1 mm |
| Sep | 30.0 °C | +2.0 °C | 0 mm | -1 mm |
| Oct | 24.8 °C | +3.9 °C | 0 mm | -12 mm |
| Nov | 17.0 °C | +4.4 °C | 1 mm | -23 mm |
| Dec | 7.0 °C | +0.4 °C | 43 mm | +13 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 Delījān?
Delījān has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 13.2 °C and it receives 250 mm of precipitation per year.
What is the hottest day ever recorded in Delījān?
The hottest day measured in Delījān between 1940 and 2025 was 26 July 2013, reaching 39.5 °C.
What is the coldest day in Delījān?
The coldest day measured in Delījān between 1940 and 2025 was 20 January 1964, at -23.1 °C.
Does it snow in Delījān?
Yes. Delījān gets on average 54.6 cm of snow per year and has around 90 frost days.
Has the climate of Delījān warmed?
Yes: Delījān warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Delījān?
The wettest day measured in Delījān between 1940 and 2025 was 31 March 2009, with 43 mm of rain in 24 hours.
What was the windiest day in Delījān?
The windiest day measured in Delījān between 1940 and 2025 was 7 April 1964, with winds reaching 43.0 km/h.
What is the warmest month in Delījān?
The warmest month in Delījān is July (26.8 °C on average); the coldest is January (-1.1 °C).
How much does it rain in Delījān?
Delījān receives on average 250 mm of precipitation per year, spread over about 61 rainy days.
Is it sunny in Delījān?
Delījān 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 Delījān?
The heaviest 24-hour snowfall measured in Delījān between 1940 and 2025 was 31 March 2009, with 20.4 cm.
Are there tropical nights in Delījān?
Yes: Delījān has on average 30 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Delījān?
In Delījān, between 1940 and 2025, the highest apparent temperature reached 38.6 °C on 16 July 1995, and the lowest was -27.9 °C on 20 January 1964.
Compare Delījān with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Delījān