Culbertson, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Culbertson, a town in Roosevelt County, Montana.
Today
73°F
Sunny
Sunny, with a high near 73. West northwest wind 10 to 15 mph, with gusts as high as 24 mph.
7-day forecast for Culbertson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Sunny | 10 to 15 mph WNW | 0% |
| Tonight | 49°F | Mostly Clear | 2 to 12 mph WSW | 1% |
| Wednesday | 84°F | Partly Sunny | 7 to 16 mph WSW | 0% |
| Wednesday Night | 52°F | Partly Cloudy | 2 to 12 mph WSW | 0% |
| Thursday | 90°F | Sunny | 2 to 9 mph WNW | 0% |
| Thursday Night | 54°F | Mostly Clear | 5 to 9 mph N | 0% |
| Friday | 87°F | Sunny | 6 mph ENE | 0% |
| Friday Night | 56°F | Mostly Clear | 6 to 9 mph ENE | 2% |
| Saturday | 89°F | Sunny | 7 to 10 mph ENE | 0% |
| Saturday Night | 56°F | Mostly Clear | 8 to 12 mph NE | 2% |
| Sunday | 87°F | Partly Sunny | 8 to 14 mph ENE | 3% |
| Sunday Night | 56°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 8 to 14 mph ENE | 16% |
| Monday | 84°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 9 to 13 mph ENE | 18% |
| Monday Night | 56°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 9 to 13 mph ENE | 27% |
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 Aug 4, 2026.