Naţanz climate — normals and trends
Naţanz (Iran) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 16.6 °C and it receives 176 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 (29.5 °C on average) and the coldest is January (2.9 °C). Rainfall peaks in March.
Naţanz averages 49 frost days, 116 hot days (≥ 30 °C) and 43 rainy days per year.
Naţanz has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 64 to 34 per year over the period.
The hottest day of the period reached 42.4 °C (on 26 July 2013) and the coldest -17.8 °C (on 1 January 1949).
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
NaţanzIsfahan
- coords
- 33.51°, 51.92°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.6°C
Average daily high
22.4°C
Average daily low
11.1°C
Annual rainfall
176mm
Sunshine / day
11.0h
Mean relative humidity
37%
Average peak wind
12.4km/h
Seasonal range
26.6°C
Frost days (< 0 °C)
49 d/yr
Hot days (≥ 30 °C)
116 d/yr
Rainy days (≥ 1 mm)
43 d/yr
Annual snowfall
24.9 cm
Average feels-like high
19.8 °C
Average feels-like low
8.0 °C
Average peak gust
30.9 km/h
Tropical nights (≥ 20 °C)
83 d/yr
Solar radiation
20.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.51 · 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
42.4 °C
26 July 2013
Coldest day
-17.8 °C
1 January 1949
Wettest day
29 mm
11 April 2002
Windiest day
45.3 km/h
24 December 1947
Strongest gust
95.0 km/h
24 December 1947
Hottest feels-like
42.2 °C
1 July 1978
Coldest feels-like
-23.1 °C
1 January 1949
Snowiest day
12.1 cm
5 February 1996
Sunniest day
13.1 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 | 9.3 °C | +1.0 °C | 25 mm | +2 mm |
| Feb | 11.2 °C | +0.2 °C | 9 mm | -12 mm |
| Mar | 17.9 °C | +1.9 °C | 39 mm | +6 mm |
| Apr | 26.7 °C | +4.8 °C | 22 mm | -8 mm |
| May | 32.6 °C | +5.0 °C | 4 mm | -15 mm |
| Jun | 34.4 °C | +1.1 °C | 3 mm | +1 mm |
| Jul | 37.0 °C | +1.6 °C | 1 mm | 0 mm |
| Aug | 36.1 °C | +1.9 °C | 0 mm | -0 mm |
| Sep | 33.1 °C | +2.4 °C | 0 mm | -0 mm |
| Oct | 28.2 °C | +4.2 °C | 0 mm | -8 mm |
| Nov | 20.1 °C | +4.3 °C | 0 mm | -18 mm |
| Dec | 10.5 °C | +0.3 °C | 64 mm | +43 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 Naţanz?
Naţanz has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 16.6 °C and it receives 176 mm of precipitation per year.
What is the hottest day ever recorded in Naţanz?
The hottest day measured in Naţanz between 1940 and 2025 was 26 July 2013, reaching 42.4 °C.
What is the coldest day in Naţanz?
The coldest day measured in Naţanz between 1940 and 2025 was 1 January 1949, at -17.8 °C.
Does it snow in Naţanz?
Yes. Naţanz gets on average 24.9 cm of snow per year and has around 49 frost days.
Has the climate of Naţanz warmed?
Yes: Naţanz warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Naţanz?
The wettest day measured in Naţanz between 1940 and 2025 was 11 April 2002, with 29 mm of rain in 24 hours.
What was the windiest day in Naţanz?
The windiest day measured in Naţanz between 1940 and 2025 was 24 December 1947, with winds reaching 45.3 km/h.
What is the warmest month in Naţanz?
The warmest month in Naţanz is July (29.5 °C on average); the coldest is January (2.9 °C).
How much does it rain in Naţanz?
Naţanz receives on average 176 mm of precipitation per year, spread over about 43 rainy days.
Is it sunny in Naţanz?
Naţanz 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 Naţanz?
The heaviest 24-hour snowfall measured in Naţanz between 1940 and 2025 was 5 February 1996, with 12.1 cm.
Are there tropical nights in Naţanz?
Yes: Naţanz has on average 83 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Naţanz?
In Naţanz, between 1940 and 2025, the highest apparent temperature reached 42.2 °C on 1 July 1978, and the lowest was -23.1 °C on 1 January 1949.
Compare Naţanz with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Naţanz