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 32°C, while the coldest is January averaging around −7°C at night. Precipitation totals about 286 mm a year and is strongly seasonal — April alone averages 45 mm while September barely receives 3 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)Zanjan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 6 | 12 | 17 | 23 | 29 | 32 | 32 | 28 | 21 | 12 | 7 |
| Avg temp (°C) | −1 | 1 | 6 | 11 | 16 | 20 | 24 | 23 | 19 | 13 | 6 | 1 |
| Avg low (°C) | −7 | −5 | −1 | 4 | 8 | 12 | 16 | 15 | 10 | 6 | 0 | −4 |
| Precipitation (mm) | 25 | 25 | 36 | 45 | 33 | 17 | 11 | 13 | 3 | 23 | 31 | 23 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 6 | 12 | 17 | 23 | 29 |
| Avg temp (°C) | −1 | 1 | 6 | 11 | 16 | 20 |
| Avg low (°C) | −7 | −5 | −1 | 4 | 8 | 12 |
| Precipitation (mm) | 25 | 25 | 36 | 45 | 33 | 17 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 32 | 28 | 21 | 12 | 7 |
| Avg temp (°C) | 24 | 23 | 19 | 13 | 6 | 1 |
| Avg low (°C) | 16 | 15 | 10 | 6 | 0 | −4 |
| Precipitation (mm) | 11 | 13 | 3 | 23 | 31 | 23 |
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.