Monarch, MT Weather & Growing Conditions
Tonight
32°F
Partly Cloudy
Partly cloudy, with a low around 32. Southwest wind 1 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 32°F | Partly Cloudy | 1 to 9 mph SW | 0% |
| Wednesday | 48°F | Mostly Sunny | 2 mph WSW | 0% |
| Wednesday Night | 33°F | Mostly Clear | 1 to 12 mph S | 0% |
| Thursday | 47°F | Sunny | 6 to 12 mph SW | 2% |
| Thursday Night | 32°F | Mostly Clear | 6 to 15 mph SW | 3% |
| Friday | 45°F | Sunny | 13 to 17 mph SW | 8% |
| Friday Night | 35°F | Partly Cloudy | 13 to 18 mph SW | 9% |
| Saturday | 48°F | Mostly Sunny | 7 to 16 mph SW | 2% |
| Saturday Night | 39°F | Partly Cloudy | 7 to 20 mph SSW | 0% |
| Sunday | 54°F | Mostly Sunny | 9 to 20 mph SSW | 1% |
| Sunday Night | 39°F | Partly Cloudy | 8 to 12 mph SW | 2% |
| Monday | 51°F | Partly Sunny | 8 mph SW | 3% |
| Monday Night | 40°F | Mostly Cloudy | 7 to 13 mph SSW | 3% |
| Tuesday | 52°F | Mostly Sunny | 9 to 15 mph SW | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Monarch, MT
Last spring frost
Jun 6
First fall frost
Sep 12
Growing season
99 days
Hardiness zone
4b
Explore more for Monarch, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Neihart 8 Nnw, Mt (4.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.