Monarch, MT Weather & Growing Conditions
Today
66°F
Sunny
Sunny, with a high near 66. East northeast wind 2 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Sunny | 2 to 7 mph ENE | 0% |
| Tonight | 48°F | Mostly Clear | 3 to 8 mph S | 1% |
| Wednesday | 74°F | Sunny | 8 mph W | 0% |
| Wednesday Night | 54°F | Mostly Clear | 3 to 7 mph S | 0% |
| Thursday | 80°F | Sunny | 8 mph WSW | 0% |
| Thursday Night | 59°F | Mostly Clear | 3 to 8 mph S | 0% |
| Friday | 85°F | Sunny | 6 to 13 mph SW | 0% |
| Friday Night | 61°F | Mostly Clear | 6 to 14 mph WSW | 0% |
| Saturday | 83°F | Sunny | 6 to 9 mph WSW | 0% |
| Saturday Night | 61°F | Mostly Clear | 5 to 8 mph WSW | 0% |
| Sunday | 79°F | Sunny | 3 to 7 mph W | 0% |
| Sunday Night | 58°F | Mostly Clear | 3 to 7 mph ENE | 4% |
| Monday | 77°F | Sunny | 2 to 7 mph WNW | 10% |
| Monday Night | 57°F | Slight Chance Rain Showers | 3 to 7 mph ESE | 20% |
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 Aug 4, 2026.