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Isfahan, Iran climate
BWk Cold desert
Isfahan has a strongly seasonal mild-temperate climate (Cold desert, Köppen BWk). The hottest month is July with an average daily high near 38°C, while the coldest is January averaging around −5°C at night. Precipitation totals about 154 mm a year and is strongly seasonal — November alone averages 20 mm while August barely receives 2 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Isfahan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 14 | 18 | 23 | 29 | 35 | 38 | 36 | 32 | 26 | 17 | 12 |
| Avg temp (°C) | 3 | 6 | 10 | 15 | 21 | 26 | 29 | 27 | 23 | 17 | 9 | 4 |
| Avg low (°C) | −5 | −3 | 2 | 7 | 12 | 17 | 20 | 18 | 13 | 7 | 1 | −3 |
| Precipitation (mm) | 15 | 19 | 19 | 20 | 14 | 10 | 11 | 2 | 3 | 2 | 20 | 19 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 14 | 18 | 23 | 29 | 35 |
| Avg temp (°C) | 3 | 6 | 10 | 15 | 21 | 26 |
| Avg low (°C) | −5 | −3 | 2 | 7 | 12 | 17 |
| Precipitation (mm) | 15 | 19 | 19 | 20 | 14 | 10 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 38 | 36 | 32 | 26 | 17 | 12 |
| Avg temp (°C) | 29 | 27 | 23 | 17 | 9 | 4 |
| Avg low (°C) | 20 | 18 | 13 | 7 | 1 | −3 |
| Precipitation (mm) | 11 | 2 | 3 | 2 | 20 | 19 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 41 | 39 | 44 | 50 | 40 | 23 | 27 | 22 | 20 | 29 | 39 | 38 |
| Relative humidity (%) | 59 | 55 | 49 | 44 | 32 | 20 | 20 | 19 | 21 | 32 | 48 | 57 |
| Wind speed (m/s) | 2.2 | 2.6 | 2.7 | 2.6 | 2.5 | 2.7 | 3.1 | 2.7 | 2.1 | 1.9 | 1.9 | 1.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 41 | 39 | 44 | 50 | 40 | 23 |
| Relative humidity (%) | 59 | 55 | 49 | 44 | 32 | 20 |
| Wind speed (m/s) | 2.2 | 2.6 | 2.7 | 2.6 | 2.5 | 2.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 27 | 22 | 20 | 29 | 39 | 38 |
| Relative humidity (%) | 20 | 19 | 21 | 32 | 48 | 57 |
| Wind speed (m/s) | 3.1 | 2.7 | 2.1 | 1.9 | 1.9 | 1.9 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Esfahan Shahid Beheshti Intl, a weather station, about 21 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.