Simms, MT Weather & Growing Conditions
Today
77°F
Sunny
Sunny, with a high near 77. Southeast wind 2 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Sunny | 2 to 7 mph SE | 0% |
| Tonight | 49°F | Mostly Clear | 5 to 8 mph SE | 1% |
| Wednesday | 86°F | Sunny | 8 mph W | 0% |
| Wednesday Night | 52°F | Mostly Clear | 8 mph NW | 0% |
| Thursday | 94°F | Sunny | 8 mph W | 0% |
| Thursday Night | 56°F | Mostly Clear | 6 to 12 mph NW | 0% |
| Friday | 97°F | Sunny | 3 to 21 mph WSW | 0% |
| Friday Night | 57°F | Mostly Clear | 10 to 21 mph W | 0% |
| Saturday | 93°F | Sunny | 6 to 14 mph WSW | 0% |
| Saturday Night | 57°F | Mostly Clear | 8 to 15 mph WNW | 1% |
| Sunday | 88°F | Sunny | 6 to 10 mph NW | 0% |
| Sunday Night | 56°F | Partly Cloudy | 7 to 14 mph N | 1% |
| Monday | 86°F | Sunny | 5 to 9 mph N | 4% |
| Monday Night | 55°F | Mostly Clear | 7 to 12 mph NNW | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Simms, MT
Last spring frost
Jun 2
First fall frost
Sep 10
Growing season
96 days
Hardiness zone
4b
Explore more for Simms, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Sun Rvr 4 S, Mt (11.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.