Chester, MT Weather & Growing Conditions
Tonight
28°F
Mostly Cloudy then Patchy Fog
Patchy fog after 5am. Mostly cloudy, with a low around 28. North wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 28°F | Mostly Cloudy then Patchy Fog | 2 mph N | 0% |
| Wednesday | 46°F | Patchy Fog | 0 to 3 mph WSW | 0% |
| Wednesday Night | 27°F | Patchy Fog | 2 mph SW | 0% |
| Thursday | 51°F | Patchy Fog then Mostly Sunny | 1 to 12 mph WSW | 0% |
| Thursday Night | 30°F | Partly Cloudy | 7 to 13 mph WSW | 0% |
| Friday | 53°F | Mostly Sunny | 7 to 16 mph WSW | 4% |
| Friday Night | 34°F | Partly Cloudy | 13 to 18 mph W | 4% |
| Saturday | 53°F | Mostly Sunny | 6 to 13 mph W | 1% |
| Saturday Night | 33°F | Partly Cloudy | 6 mph SW | 0% |
| Sunday | 59°F | Partly Sunny | 5 to 15 mph WSW | 1% |
| Sunday Night | 35°F | Mostly Cloudy | 6 to 15 mph W | 3% |
| Monday | 53°F | Partly Sunny | 7 mph SW | 3% |
| Monday Night | 34°F | Mostly Cloudy | 7 mph S | 2% |
| Tuesday | 57°F | Mostly Sunny | 6 to 13 mph SW | 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 (3.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.