Harman US

Chester, MT Weather & Growing Conditions

Overnight
49°F
Mostly Cloudy
Mostly cloudy, with a low around 49. Northeast wind around 7 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 49°F Mostly Cloudy 7 mph NE 0%
Saturday 69°F Partly Sunny 6 to 9 mph E 0%
Saturday Night 44°F Mostly Cloudy 2 to 7 mph ESE 0%
Sunday 71°F Patchy Fog then Mostly Sunny 2 to 8 mph SE 0%
Sunday Night 46°F Mostly Clear 5 to 9 mph SE 0%
Monday 77°F Sunny 3 to 9 mph SSE 0%
Monday Night 46°F Mostly Clear 1 to 7 mph S 0%
Tuesday 76°F Sunny 1 to 5 mph WSW 0%
Tuesday Night 47°F Mostly Clear 1 to 5 mph ESE 0%
Wednesday 77°F Sunny 0 to 7 mph WSW 2%
Wednesday Night 48°F Mostly Clear 2 to 6 mph SSE 3%
Thursday 76°F Sunny 2 to 6 mph SW 2%
Thursday Night 48°F Partly Cloudy 6 mph E 11%
Friday 73°F Mostly Sunny 2 to 8 mph SE 10%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Chester, MT

Last spring frost
May 24
First fall frost
Sep 17
Growing season
115 days
Hardiness zone
4a

Explore more for Chester, MT: full frost dates · planting calendar · Montana frost dates

Climate data from the nearest NOAA station, Chester, Mt (3.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.