Harman US

Monarch, MT Weather & Growing Conditions

This Afternoon
54°F
Light Rain Likely
Rain likely. Cloudy, with a high near 54. East wind around 5 mph. Chance of precipitation is 60%.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 54°F Light Rain Likely 5 mph E 60%
Tonight 44°F Slight Chance Light Rain then Mostly Cloudy 5 mph S 23%
Sunday 63°F Mostly Sunny 1 to 5 mph ENE 6%
Sunday Night 45°F Mostly Clear 3 to 8 mph SSE 1%
Monday 69°F Sunny 7 mph SW 2%
Monday Night 49°F Mostly Clear 3 to 9 mph SW 0%
Tuesday 70°F Sunny 7 mph SW 0%
Tuesday Night 53°F Partly Cloudy 6 mph SSW 1%
Wednesday 70°F Mostly Sunny 5 to 8 mph SW 3%
Wednesday Night 52°F Partly Cloudy 7 mph SSW 7%
Thursday 70°F Sunny 9 mph SSW 3%
Thursday Night 54°F Mostly Clear 6 to 12 mph SSE 5%
Friday 69°F Mostly Sunny 10 mph SSW 7%
Friday Night 49°F Slight Chance Light Rain then Mostly Cloudy 5 to 8 mph SSW 15%

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.