Culbertson, MT Weather & Growing Conditions
Tonight
55°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 55. Northeast wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Chance Rain Showers | 7 to 10 mph NE | 28% |
| Saturday | 67°F | Chance Rain Showers | 9 to 15 mph ENE | 34% |
| Saturday Night | 50°F | Chance Rain Showers | 13 mph E | 45% |
| Sunday | 63°F | Rain Showers Likely | 13 mph E | 59% |
| Sunday Night | 47°F | Mostly Cloudy | 8 to 12 mph ESE | 4% |
| Monday | 71°F | Mostly Sunny | 8 to 15 mph SE | 1% |
| Monday Night | 50°F | Partly Cloudy | 15 mph SE | 0% |
| Tuesday | 77°F | Mostly Sunny | 15 mph SSE | 0% |
| Tuesday Night | 53°F | Partly Cloudy | 9 to 15 mph SE | 4% |
| Wednesday | 79°F | Sunny | 8 mph SSE | 7% |
| Wednesday Night | 53°F | Mostly Clear | 6 mph SSE | 7% |
| Thursday | 81°F | Sunny | 3 to 9 mph SE | 2% |
| Thursday Night | 54°F | Mostly Clear | 7 to 10 mph SE | 2% |
| Friday | 80°F | Mostly Sunny | 9 to 14 mph SE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Culbertson, MT
Last spring frost
May 21
First fall frost
Sep 20
Growing season
120 days
Hardiness zone
4a
Explore more for Culbertson, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Culbertson, Mt (5.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.