Harman US

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

WhenTempForecastWindPrecip
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.