Chester, MT Weather & Growing Conditions
Today
46°F
Mostly Sunny
Mostly sunny. High near 46, with temperatures falling to around 41 in the afternoon. Southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 46°F | Mostly Sunny | 3 mph SW | 0% |
| Tonight | 27°F | Partly Cloudy | 3 mph SE | 0% |
| Thursday | 52°F | Partly Sunny | 2 to 15 mph WSW | 0% |
| Thursday Night | 31°F | Mostly Clear | 6 to 14 mph WSW | 1% |
| Friday | 53°F | Mostly Sunny | 6 to 13 mph SW | 0% |
| Friday Night | 36°F | Partly Cloudy | 12 mph WSW | 0% |
| Saturday | 57°F | Mostly Sunny | 6 to 9 mph WSW | 0% |
| Saturday Night | 35°F | Mostly Cloudy | 6 mph SSW | 0% |
| Sunday | 61°F | Partly Sunny | 6 to 17 mph WSW | 1% |
| Sunday Night | 35°F | Partly Cloudy | 6 to 17 mph W | 1% |
| Monday | 53°F | Mostly Sunny | 6 mph WSW | 1% |
| Monday Night | 34°F | Mostly Cloudy | 6 mph SSW | 1% |
| Tuesday | 57°F | Mostly Sunny | 6 to 12 mph WSW | 1% |
| Tuesday Night | 36°F | Partly Cloudy | 6 to 9 mph WSW | 1% |
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 (11.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.