Culbertson, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Culbertson, a town in Roosevelt County, Montana.
Today
69°F
Cloudy
Cloudy, with a high near 69. Northeast wind 12 to 15 mph, with gusts as high as 24 mph.
7-day forecast for Culbertson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Cloudy | 12 to 15 mph NE | 8% |
| Tonight | 50°F | Chance Rain Showers | 13 mph E | 42% |
| Sunday | 63°F | Chance Rain Showers then Patchy Fog | 13 mph ESE | 38% |
| Sunday Night | 46°F | Partly Cloudy | 5 to 9 mph ESE | 2% |
| Monday | 72°F | Mostly Sunny | 6 to 15 mph SE | 1% |
| Monday Night | 49°F | Mostly Clear | 14 mph SSE | 1% |
| Tuesday | 77°F | Sunny | 12 to 15 mph SSE | 2% |
| Tuesday Night | 52°F | Mostly Clear | 8 to 15 mph SE | 1% |
| Wednesday | 81°F | Sunny | 8 mph SE | 6% |
| Wednesday Night | 53°F | Partly Cloudy | 3 to 7 mph SE | 10% |
| Thursday | 83°F | Mostly Sunny | 3 to 9 mph SE | 1% |
| Thursday Night | 55°F | Mostly Clear | 9 mph SE | 5% |
| Friday | 82°F | Mostly Sunny | 8 to 16 mph SE | 2% |
| Friday Night | 53°F | Partly Cloudy | 16 mph SE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Culbertson (48.145, -104.518). Updated through the day.
Growing snapshot for Culbertson
Last spring frost
May 21
First fall frost
Sep 20
Growing season
120 days
Hardiness zone
4a
More local growing data for Culbertson: nearby ZIP 59218 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Culbertson, Mt (5.2 mi from Culbertson). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.