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Altai, Mongolia climate
BSk Cold semi-arid
Altai has a strongly seasonal subarctic climate (Cold semi-arid, Köppen BSk). The hottest month is July with an average daily high near 21°C, while the coldest is January averaging around −25°C at night. Precipitation totals about 140 mm a year and is strongly seasonal — July alone averages 30 mm while January 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)Altai climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −11 | −7 | −1 | 7 | 13 | 19 | 21 | 19 | 13 | 5 | −3 | −9 |
| Avg temp (°C) | −18 | −15 | −8 | 1 | 7 | 13 | 15 | 13 | 7 | −1 | −10 | −16 |
| Avg low (°C) | −25 | −22 | −15 | −6 | 0 | 6 | 9 | 7 | 0 | −7 | −16 | −22 |
| Precipitation (mm) | 2 | 5 | 4 | 6 | 20 | 27 | 30 | 24 | 9 | 8 | 3 | 2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −11 | −7 | −1 | 7 | 13 | 19 |
| Avg temp (°C) | −18 | −15 | −8 | 1 | 7 | 13 |
| Avg low (°C) | −25 | −22 | −15 | −6 | 0 | 6 |
| Precipitation (mm) | 2 | 5 | 4 | 6 | 20 | 27 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 21 | 19 | 13 | 5 | −3 | −9 |
| Avg temp (°C) | 15 | 13 | 7 | −1 | −10 | −16 |
| Avg low (°C) | 9 | 7 | 0 | −7 | −16 | −22 |
| Precipitation (mm) | 30 | 24 | 9 | 8 | 3 | 2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 45 | 49 | 56 | 55 | 56 | 61 | 61 | 55 | 46 | 46 | 51 | 49 |
| Relative humidity (%) | 78 | 69 | 52 | 41 | 38 | 41 | 45 | 46 | 45 | 51 | 64 | 75 |
| Wind speed (mph) | 4.8 | 5.5 | 7.0 | 8.1 | 8.1 | 6.8 | 5.9 | 5.8 | 5.9 | 5.8 | 5.9 | 5.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 45 | 49 | 56 | 55 | 56 | 61 |
| Relative humidity (%) | 78 | 69 | 52 | 41 | 38 | 41 |
| Wind speed (mph) | 4.8 | 5.5 | 7.0 | 8.1 | 8.1 | 6.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 55 | 46 | 46 | 51 | 49 |
| Relative humidity (%) | 45 | 46 | 45 | 51 | 64 | 75 |
| Wind speed (mph) | 5.9 | 5.8 | 5.9 | 5.8 | 5.9 | 5.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Altai, a weather station, about 3 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.