Harman US

Chester, MT Weather & Growing Conditions

This Afternoon
69°F
Mostly Sunny
Mostly sunny, with a high near 69. Southeast wind around 8 mph.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 69°F Mostly Sunny 8 mph SE 1%
Tonight 44°F Partly Cloudy 2 to 7 mph ESE 1%
Sunday 71°F Sunny 2 to 8 mph SSE 1%
Sunday Night 46°F Partly Cloudy 3 to 7 mph SE 0%
Monday 77°F Mostly Sunny 3 to 9 mph SSE 0%
Monday Night 47°F Mostly Clear 1 to 7 mph SSE 0%
Tuesday 78°F Sunny 1 to 6 mph SW 0%
Tuesday Night 50°F Mostly Clear 3 mph SW 0%
Wednesday 78°F Mostly Sunny 1 to 6 mph WSW 1%
Wednesday Night 49°F Partly Cloudy 5 mph W 13%
Thursday 74°F Mostly Sunny 2 to 6 mph W 2%
Thursday Night 48°F Partly Cloudy 6 mph ENE 8%
Friday 72°F Mostly Sunny 3 to 8 mph ESE 8%
Friday Night 45°F Slight Chance Light Rain 9 mph NNW 19%

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.