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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 100°F, while the coldest is January averaging around 23°F at night. Precipitation totals about 6 inches a year and is strongly seasonal — November alone averages 0.8 inches while August barely receives 0.08 inches.
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 (°F) | 50 | 56 | 65 | 74 | 85 | 95 | 100 | 97 | 90 | 78 | 62 | 53 |
| Avg temp (°F) | 37 | 42 | 50 | 60 | 69 | 79 | 84 | 80 | 73 | 62 | 48 | 40 |
| Avg low (°F) | 23 | 27 | 35 | 45 | 54 | 63 | 68 | 64 | 56 | 45 | 34 | 27 |
| Precipitation (in) | 0.6 | 0.7 | 0.8 | 0.8 | 0.6 | 0.4 | 0.4 | 0.1 | 0.1 | 0.1 | 0.8 | 0.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 50 | 56 | 65 | 74 | 85 | 95 |
| Avg temp (°F) | 37 | 42 | 50 | 60 | 69 | 79 |
| Avg low (°F) | 23 | 27 | 35 | 45 | 54 | 63 |
| Precipitation (in) | 0.6 | 0.7 | 0.8 | 0.8 | 0.6 | 0.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 100 | 97 | 90 | 78 | 62 | 53 |
| Avg temp (°F) | 84 | 80 | 73 | 62 | 48 | 40 |
| Avg low (°F) | 68 | 64 | 56 | 45 | 34 | 27 |
| Precipitation (in) | 0.4 | 0.1 | 0.1 | 0.1 | 0.8 | 0.8 |
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 (mph) | 4.9 | 5.7 | 6.1 | 5.8 | 5.5 | 6.0 | 7.0 | 6.1 | 4.8 | 4.3 | 4.3 | 4.3 |
| 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 (mph) | 4.9 | 5.7 | 6.1 | 5.8 | 5.5 | 6.0 |
| 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 (mph) | 7.0 | 6.1 | 4.8 | 4.3 | 4.3 | 4.3 |
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.