Monarch, MT Weather & Growing Conditions
Overnight
33°F
Partly Cloudy
Partly cloudy, with a low around 33. South southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 33°F | Partly Cloudy | 5 mph SSW | 0% |
| Wednesday | 50°F | Sunny | 2 mph WNW | 0% |
| Wednesday Night | 34°F | Mostly Clear | 2 to 13 mph SSW | 0% |
| Thursday | 46°F | Mostly Sunny | 8 to 12 mph SW | 3% |
| Thursday Night | 32°F | Mostly Clear | 8 to 14 mph SW | 3% |
| Friday | 46°F | Sunny | 13 to 16 mph SW | 1% |
| Friday Night | 39°F | Partly Cloudy | 13 to 21 mph SW | 1% |
| Saturday | 52°F | Sunny | 7 to 17 mph SW | 0% |
| Saturday Night | 43°F | Partly Cloudy | 7 to 21 mph SSW | 0% |
| Sunday | 56°F | Mostly Sunny | 8 to 21 mph SW | 4% |
| Sunday Night | 39°F | Partly Cloudy | 7 to 10 mph SW | 4% |
| Monday | 51°F | Mostly Sunny | 8 mph SW | 3% |
| Monday Night | 41°F | Mostly Cloudy | 6 to 10 mph SSW | 3% |
| Tuesday | 53°F | Mostly Sunny | 8 to 14 mph SW | 5% |
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.