Qarchak climate — normals and trends
Qarchak (Iran) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 16.8 °C and it receives 271 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 (31.5 °C on average) and the coldest is January (1.9 °C). Rainfall peaks in March.
Qarchak averages 65 frost days, 127 hot days (≥ 30 °C) and 52 rainy days per year.
Qarchak has warmed by +3.0 °C between 1940 and 2025, or +0.35 °C per decade. This trend is statistically significant.
The number of frost days there went from about 90 to 40 per year over the period.
The hottest day of the period reached 43.7 °C (on 24 July 2013) and the coldest -21.2 °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
QarchakTehran
- coords
- 35.43°, 51.58°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.8°C
Average daily high
22.8°C
Average daily low
10.8°C
Annual rainfall
271mm
Sunshine / day
10.9h
Mean relative humidity
41%
Average peak wind
11.5km/h
Seasonal range
29.6°C
Frost days (< 0 °C)
65 d/yr
Hot days (≥ 30 °C)
127 d/yr
Rainy days (≥ 1 mm)
52 d/yr
Annual snowfall
22.1 cm
Average feels-like high
20.5 °C
Average feels-like low
7.8 °C
Average peak gust
27.0 km/h
Tropical nights (≥ 20 °C)
92 d/yr
Solar radiation
19.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.47 · 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
43.7 °C
24 July 2013
Coldest day
-21.2 °C
8 February 1950
Wettest day
39 mm
29 January 2013
Windiest day
40.4 km/h
25 April 1978
Strongest gust
83.5 km/h
7 April 1964
Hottest feels-like
42.7 °C
27 July 2024
Coldest feels-like
-26.0 °C
8 February 1950
Snowiest day
13.5 cm
25 December 1990
Sunniest day
13.4 h
20 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 | 10.4 °C | +2.8 °C | 14 mm | -25 mm |
| Feb | 9.9 °C | -0.1 °C | 28 mm | -11 mm |
| Mar | 18.4 °C | +3.2 °C | 42 mm | -11 mm |
| Apr | 26.6 °C | +4.6 °C | 15 mm | -21 mm |
| May | 33.2 °C | +4.6 °C | 3 mm | -12 mm |
| Jun | 35.3 °C | +0.6 °C | 2 mm | -0 mm |
| Jul | 38.9 °C | +1.5 °C | 1 mm | -0 mm |
| Aug | 37.9 °C | +1.9 °C | 0 mm | -1 mm |
| Sep | 32.9 °C | +1.1 °C | 0 mm | -1 mm |
| Oct | 28.1 °C | +3.6 °C | 0 mm | -13 mm |
| Nov | 20.0 °C | +4.2 °C | 1 mm | -33 mm |
| Dec | 11.4 °C | +1.8 °C | 24 mm | -14 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 Qarchak?
Qarchak has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 16.8 °C and it receives 271 mm of precipitation per year.
What is the hottest day ever recorded in Qarchak?
The hottest day measured in Qarchak between 1940 and 2025 was 24 July 2013, reaching 43.7 °C.
What is the coldest day in Qarchak?
The coldest day measured in Qarchak between 1940 and 2025 was 8 February 1950, at -21.2 °C.
Does it snow in Qarchak?
Yes. Qarchak gets on average 22.1 cm of snow per year and has around 65 frost days.
Has the climate of Qarchak warmed?
Yes: Qarchak warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Qarchak?
The wettest day measured in Qarchak between 1940 and 2025 was 29 January 2013, with 39 mm of rain in 24 hours.
What was the windiest day in Qarchak?
The windiest day measured in Qarchak between 1940 and 2025 was 25 April 1978, with winds reaching 40.4 km/h.
What is the warmest month in Qarchak?
The warmest month in Qarchak is July (31.5 °C on average); the coldest is January (1.9 °C).
How much does it rain in Qarchak?
Qarchak receives on average 271 mm of precipitation per year, spread over about 52 rainy days.
Is it sunny in Qarchak?
Qarchak gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
What is the biggest single-day snowfall in Qarchak?
The heaviest 24-hour snowfall measured in Qarchak between 1940 and 2025 was 25 December 1990, with 13.5 cm.
Are there tropical nights in Qarchak?
Yes: Qarchak has on average 92 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Qarchak?
In Qarchak, between 1940 and 2025, the highest apparent temperature reached 42.7 °C on 27 July 2024, and the lowest was -26.0 °C on 8 February 1950.
Compare Qarchak with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Qarchak