Chester, MT Weather & Growing Conditions
This Afternoon
69°F
Partly Sunny
Partly sunny, with a high near 69. East southeast wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Partly Sunny | 8 mph ESE | 1% |
| Tonight | 45°F | Partly Cloudy | 3 to 7 mph ESE | 0% |
| Sunday | 72°F | Sunny | 5 to 8 mph SE | 1% |
| Sunday Night | 46°F | Mostly Clear | 6 to 9 mph SE | 0% |
| Monday | 76°F | Sunny | 8 mph SSE | 0% |
| Monday Night | 47°F | Mostly Clear | 2 to 8 mph S | 0% |
| Tuesday | 76°F | Sunny | 5 mph W | 0% |
| Tuesday Night | 47°F | Mostly Clear | 5 mph E | 0% |
| Wednesday | 77°F | Sunny | 2 to 6 mph WSW | 2% |
| Wednesday Night | 48°F | Mostly Clear | 6 mph ENE | 4% |
| Thursday | 76°F | Sunny | 6 mph SSW | 2% |
| Thursday Night | 48°F | Partly Cloudy | 8 mph E | 13% |
| Friday | 72°F | Mostly Sunny | 3 to 8 mph ESE | 10% |
| Friday Night | 44°F | Chance Light Rain | 9 mph N | 27% |
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 Sep 19, 2026.