Simms, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Simms, a community in Cascade County, Montana.
Overnight
30°F
Mostly Cloudy
Mostly cloudy, with a low around 30. West southwest wind around 3 mph.
7-day forecast for Simms
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 30°F | Mostly Cloudy | 3 mph WSW | 0% |
| Wednesday | 51°F | Mostly Sunny | 3 mph W | 0% |
| Wednesday Night | 32°F | Mostly Clear | 1 to 12 mph SW | 0% |
| Thursday | 54°F | Mostly Sunny | 12 to 16 mph SW | 0% |
| Thursday Night | 34°F | Partly Cloudy | 13 mph SW | 0% |
| Friday | 54°F | Mostly Sunny | 12 to 23 mph SW | 0% |
| Friday Night | 40°F | Mostly Cloudy | 13 to 23 mph SW | 1% |
| Saturday | 60°F | Mostly Sunny | 9 to 15 mph SSW | 1% |
| Saturday Night | 41°F | Partly Cloudy | 9 to 16 mph SSW | 0% |
| Sunday | 63°F | Partly Sunny | 13 to 23 mph SW | 0% |
| Sunday Night | 38°F | Partly Cloudy | 7 to 13 mph SW | 1% |
| Monday | 56°F | Mostly Sunny | 8 mph SSW | 1% |
| Monday Night | 39°F | Mostly Cloudy | 7 to 12 mph SSW | 0% |
| Tuesday | 59°F | Mostly Sunny | 12 to 20 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Simms (47.493, -111.954). Updated through the day.
Growing snapshot for Simms
Last spring frost
Jun 2
First fall frost
Sep 10
Growing season
96 days
Hardiness zone
4b
More local growing data for Simms: nearby ZIP 59477 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
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Big Stone Colony
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Fairfield
Fort Shaw
Gibson Flats
Great Falls
Hardy
Malmstrom AFB
Monarch
Neihart
Pleasant Valley Colony
Riceville
Sand Coulee
Stockett
Sun Prairie
Sun River
Tracy
Ulm
Vaughn
Climate data from the nearest NOAA station, Sun Rvr 4 S, Mt (11.3 mi from Simms). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.