Glasgow, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Glasgow, a city in Valley County, Montana.
This Afternoon
79°F
Sunny
Sunny, with a high near 79. North wind around 10 mph.
7-day forecast for Glasgow
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Sunny | 10 mph N | 1% |
| Tonight | 55°F | Mostly Cloudy | 10 to 14 mph NNE | 14% |
| Saturday | 69°F | Chance Rain Showers | 12 to 15 mph NE | 28% |
| Saturday Night | 52°F | Chance Rain Showers | 13 mph E | 49% |
| Sunday | 65°F | Chance Rain Showers then Mostly Cloudy | 13 mph E | 43% |
| Sunday Night | 50°F | Mostly Cloudy | 12 mph ESE | 4% |
| Monday | 72°F | Partly Sunny | 10 to 15 mph SE | 2% |
| Monday Night | 52°F | Mostly Clear | 10 to 14 mph SE | 0% |
| Tuesday | 78°F | Sunny | 10 mph SE | 0% |
| Tuesday Night | 53°F | Mostly Clear | 5 to 8 mph ESE | 1% |
| Wednesday | 80°F | Sunny | 8 mph SE | 6% |
| Wednesday Night | 53°F | Mostly Clear | 6 mph ESE | 3% |
| Thursday | 80°F | Sunny | 6 to 9 mph SE | 2% |
| Thursday Night | 54°F | Mostly Clear | 9 mph ESE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Glasgow (48.199, -106.632). Updated through the day.
Growing snapshot for Glasgow
Last spring frost
May 3
First fall frost
Oct 1
Growing season
151 days
Hardiness zone
4a
More local growing data for Glasgow: nearby ZIP 59230 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Glasgow #2, Mt (8.5 mi from Glasgow). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.