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Glasgow, Montana climate
BSk Cold semi-arid
Glasgow has a strongly seasonal cold-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is July with an average daily high near 31°C, while the coldest is January averaging around −16°C at night. Precipitation totals about 353 mm a year and is strongly seasonal — June alone averages 72 mm while February barely receives 9 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)Glasgow climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −3 | −1 | 7 | 16 | 21 | 26 | 31 | 31 | 25 | 16 | 6 | −1 |
| Avg temp (°C) | −10 | −7 | 0 | 7 | 13 | 18 | 22 | 22 | 16 | 8 | −1 | −7 |
| Avg low (°C) | −16 | −14 | −7 | −1 | 5 | 10 | 13 | 13 | 7 | 0 | −7 | −14 |
| Precipitation (mm) | 10 | 9 | 12 | 28 | 53 | 72 | 52 | 36 | 29 | 25 | 14 | 12 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −3 | −1 | 7 | 16 | 21 | 26 |
| Avg temp (°C) | −10 | −7 | 0 | 7 | 13 | 18 |
| Avg low (°C) | −16 | −14 | −7 | −1 | 5 | 10 |
| Precipitation (mm) | 10 | 9 | 12 | 28 | 53 | 72 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 25 | 16 | 6 | −1 |
| Avg temp (°C) | 22 | 22 | 16 | 8 | −1 | −7 |
| Avg low (°C) | 13 | 13 | 7 | 0 | −7 | −14 |
| Precipitation (mm) | 52 | 36 | 29 | 25 | 14 | 12 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 68 | 69 | 68 | 64 | 62 | 48 | 49 | 55 | 64 | 69 | 70 |
| Relative humidity (%) | 81 | 74 | 65 | 57 | 54 | 53 | 48 | 48 | 53 | 62 | 72 | 79 |
| Wind speed (km/h) | 12.7 | 12.6 | 13.5 | 13.8 | 13.4 | 12.9 | 11.4 | 11.5 | 12.0 | 13.0 | 12.6 | 12.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 68 | 69 | 68 | 64 | 62 |
| Relative humidity (%) | 81 | 74 | 65 | 57 | 54 | 53 |
| Wind speed (km/h) | 12.7 | 12.6 | 13.5 | 13.8 | 13.4 | 12.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 48 | 49 | 55 | 64 | 69 | 70 |
| Relative humidity (%) | 48 | 48 | 53 | 62 | 72 | 79 |
| Wind speed (km/h) | 11.4 | 11.5 | 12.0 | 13.0 | 12.6 | 12.4 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Wokal Field/glasgow Intl Airport, a weather station, about 2 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.