Monarch, MT Weather & Growing Conditions
Overnight
49°F
Light Rain Likely
Rain likely. Cloudy, with a low around 49. West southwest wind around 1 mph. Chance of precipitation is 60%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Light Rain Likely | 1 mph WSW | 61% |
| Saturday | 55°F | Rain Likely | 2 to 6 mph NE | 63% |
| Saturday Night | 44°F | Chance Light Rain | 5 mph S | 25% |
| Sunday | 62°F | Partly Sunny | 5 mph WSW | 10% |
| Sunday Night | 45°F | Mostly Clear | 3 to 7 mph SE | 0% |
| Monday | 68°F | Sunny | 7 mph SSW | 1% |
| Monday Night | 49°F | Mostly Clear | 5 to 8 mph SSW | 0% |
| Tuesday | 69°F | Sunny | 7 mph SW | 0% |
| Tuesday Night | 51°F | Mostly Clear | 7 mph SSW | 1% |
| Wednesday | 70°F | Sunny | 7 mph SSW | 1% |
| Wednesday Night | 52°F | Mostly Clear | 5 to 9 mph SSW | 4% |
| Thursday | 71°F | Sunny | 9 mph SSW | 1% |
| Thursday Night | 53°F | Mostly Clear | 5 to 12 mph S | 5% |
| Friday | 70°F | Mostly Sunny | 10 mph SSW | 6% |
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 Sep 19, 2026.