Zanjan, Iran climate
BSk Cold semi-arid
Zanjan has a strongly seasonal cool-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is July with an average daily high near 90°F, while the coldest is January averaging around 20°F at night. Precipitation totals about 11 inches a year and is strongly seasonal — April alone averages 1.8 inches while September barely receives 0.14 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)Zanjan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 39 | 43 | 53 | 63 | 73 | 84 | 90 | 90 | 82 | 69 | 53 | 44 |
| Avg temp (°F) | 30 | 33 | 42 | 51 | 60 | 69 | 75 | 74 | 67 | 56 | 43 | 34 |
| Avg low (°F) | 20 | 24 | 31 | 40 | 47 | 54 | 60 | 59 | 51 | 42 | 32 | 25 |
| Precipitation (in) | 1.0 | 1.0 | 1.4 | 1.8 | 1.3 | 0.7 | 0.4 | 0.5 | 0.1 | 0.9 | 1.2 | 0.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 39 | 43 | 53 | 63 | 73 | 84 |
| Avg temp (°F) | 30 | 33 | 42 | 51 | 60 | 69 |
| Avg low (°F) | 20 | 24 | 31 | 40 | 47 | 54 |
| Precipitation (in) | 1.0 | 1.0 | 1.4 | 1.8 | 1.3 | 0.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 90 | 90 | 82 | 69 | 53 | 44 |
| Avg temp (°F) | 75 | 74 | 67 | 56 | 43 | 34 |
| Avg low (°F) | 60 | 59 | 51 | 42 | 32 | 25 |
| Precipitation (in) | 0.4 | 0.5 | 0.1 | 0.9 | 1.2 | 0.9 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 70 | 67 | 64 | 53 | 34 | 31 | 29 | 30 | 49 | 61 | 67 |
| Relative humidity (%) | 75 | 71 | 65 | 61 | 55 | 48 | 50 | 50 | 51 | 58 | 69 | 74 |
| Wind speed (mph) | 4.9 | 5.8 | 6.0 | 5.8 | 5.3 | 6.2 | 7.7 | 7.5 | 6.1 | 5.2 | 4.7 | 4.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 70 | 67 | 64 | 53 | 34 |
| Relative humidity (%) | 75 | 71 | 65 | 61 | 55 | 48 |
| Wind speed (mph) | 4.9 | 5.8 | 6.0 | 5.8 | 5.3 | 6.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 31 | 29 | 30 | 49 | 61 | 67 |
| Relative humidity (%) | 50 | 50 | 51 | 58 | 69 | 74 |
| Wind speed (mph) | 7.7 | 7.5 | 6.1 | 5.2 | 4.7 | 4.6 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Zanjan, a weather station, about 16 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.