Glasgow, MT
Climate overview — based on NOAA 1991-2020 normals from GLASGOW #2, MT US.
Year-round temperatures (°F)
Avg high
Avg low
Climate summary
Glasgow has an annual average temperature of 44.2°F with about 0 inches of precipitation per year. The warmest month is July (average high 86.7°F), and the coldest is January (average low 4.0°F).
Pleasant months
1 / 12
avg high 65–80°F, low ≥ 50°F
Annual swing
58.6°F
warmest to coldest month
Best time to visit Glasgow
Full guide →Climate change signal
All-time records →36 of 366 (9.8%) of Glasgow's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1890s | 19 | |
| 1900s | 32 | |
| 1910s | 34 | |
| 1920s | 51 | |
| 1930s | 66 | |
| 1940s | 50 | |
| 1950s | 23 | |
| 1990s | 17 | |
| 2000s | 27 | |
| 2010s | 25 | |
| 2020s | 22 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 24.5°F | 4.0°F | 14.2°F | in | — | — |
| February | 29.6°F | 8.4°F | 19.0°F | in | — | — |
| March | 43.8°F | 20.9°F | 32.4°F | in | — | — |
| April | 58.5°F | 33.0°F | 45.8°F | in | — | — |
| May | 69.6°F | 43.7°F | 56.7°F | in | — | — |
| June | 78.1°F | 53.2°F | 65.7°F | in | — | — |
| July | 86.7°F | 58.8°F | 72.8°F | in | — | — |
| August | 85.2°F | 56.8°F | 71.0°F | in | — | — |
| September | 73.2°F | 46.1°F | 59.6°F | in | — | — |
| October | 57.1°F | 33.4°F | 45.2°F | in | — | — |
| November | 40.4°F | 18.8°F | 29.6°F | in | — | — |
| December | 27.9°F | 8.3°F | 18.1°F | in | — | — |
Last spring / first fall frost
All-time recordsHottest, coldest, wettest
Planting calendarWhat to plant, and when