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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.