Fīrūzkūh climate — normals and trends
Fīrūzkūh (Iran) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.9 °C and it receives 493 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 (19.1 °C on average) and the coldest is January (-6.0 °C). Rainfall peaks in May.
Fīrūzkūh averages 145 frost days, 1 hot days (≥ 30 °C) and 108 rainy days per year.
Fīrūzkūh 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 163 to 127 per year over the period.
The hottest day of the period reached 32.3 °C (on 17 July 2003) and the coldest -23.0 °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
FīrūzkūhTehran
- coords
- 35.76°, 52.77°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.9°C
Average daily high
11.5°C
Average daily low
2.7°C
Annual rainfall
493mm
Sunshine / day
10.8h
Mean relative humidity
61%
Average peak wind
8.6km/h
Seasonal range
25.1°C
Frost days (< 0 °C)
145 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
108 d/yr
Annual snowfall
126.5 cm
Average feels-like high
9.2 °C
Average feels-like low
0.0 °C
Average peak gust
33.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
18.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.39 · 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
32.3 °C
17 July 2003
Coldest day
-23.0 °C
20 January 1964
Wettest day
51 mm
7 May 1949
Windiest day
28.6 km/h
1 April 1946
Strongest gust
105.1 km/h
17 April 1976
Hottest feels-like
31.4 °C
13 August 1997
Coldest feels-like
-27.5 °C
20 January 1964
Snowiest day
27.6 cm
26 February 2020
Sunniest day
13.3 h
19 June 1941
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 | 1.3 °C | +3.5 °C | 24 mm | -4 mm |
| Feb | -1.7 °C | -0.4 °C | 41 mm | +6 mm |
| Mar | 6.8 °C | +3.6 °C | 50 mm | -5 mm |
| Apr | 15.3 °C | +5.1 °C | 48 mm | -15 mm |
| May | 21.1 °C | +4.8 °C | 50 mm | -25 mm |
| Jun | 21.7 °C | +0.1 °C | 68 mm | +21 mm |
| Jul | 25.3 °C | +0.9 °C | 27 mm | -7 mm |
| Aug | 25.7 °C | +2.1 °C | 12 mm | -20 mm |
| Sep | 22.3 °C | +1.8 °C | 18 mm | -12 mm |
| Oct | 18.5 °C | +4.4 °C | 5 mm | -29 mm |
| Nov | 11.9 °C | +5.2 °C | 1 mm | -31 mm |
| Dec | 2.8 °C | +2.2 °C | 33 mm | +5 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 Fīrūzkūh?
Fīrūzkūh has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.9 °C and it receives 493 mm of precipitation per year.
What is the hottest day ever recorded in Fīrūzkūh?
The hottest day measured in Fīrūzkūh between 1940 and 2025 was 17 July 2003, reaching 32.3 °C.
What is the coldest day in Fīrūzkūh?
The coldest day measured in Fīrūzkūh between 1940 and 2025 was 20 January 1964, at -23.0 °C.
Does it snow in Fīrūzkūh?
Yes. Fīrūzkūh gets on average 126.5 cm of snow per year and has around 145 frost days.
Has the climate of Fīrūzkūh warmed?
Yes: Fīrūzkūh warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Fīrūzkūh?
The wettest day measured in Fīrūzkūh between 1940 and 2025 was 7 May 1949, with 51 mm of rain in 24 hours.
What was the windiest day in Fīrūzkūh?
The windiest day measured in Fīrūzkūh between 1940 and 2025 was 1 April 1946, with winds reaching 28.6 km/h.
What is the warmest month in Fīrūzkūh?
The warmest month in Fīrūzkūh is July (19.1 °C on average); the coldest is January (-6.0 °C).
How much does it rain in Fīrūzkūh?
Fīrūzkūh receives on average 493 mm of precipitation per year, spread over about 108 rainy days.
Is it sunny in Fīrūzkūh?
Fīrūzkūh gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.
What is the biggest single-day snowfall in Fīrūzkūh?
The heaviest 24-hour snowfall measured in Fīrūzkūh between 1940 and 2025 was 26 February 2020, with 27.6 cm.
Are there tropical nights in Fīrūzkūh?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Fīrūzkūh.
What was the most extreme apparent temperature in Fīrūzkūh?
In Fīrūzkūh, between 1940 and 2025, the highest apparent temperature reached 31.4 °C on 13 August 1997, and the lowest was -27.5 °C on 20 January 1964.
Compare Fīrūzkūh with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Fīrūzkūh