Chester, MT Weather & Growing Conditions
Today
76°F
Sunny
Sunny, with a high near 76. West northwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Sunny | 6 mph WNW | 1% |
| Tonight | 49°F | Mostly Clear | 5 mph SW | 1% |
| Wednesday | 83°F | Mostly Sunny | 7 mph WNW | 0% |
| Wednesday Night | 51°F | Mostly Clear | 3 to 7 mph ENE | 0% |
| Thursday | 91°F | Sunny | 3 to 8 mph NW | 0% |
| Thursday Night | 55°F | Mostly Clear | 9 mph NE | 0% |
| Friday | 93°F | Sunny | 5 to 14 mph NE | 0% |
| Friday Night | 57°F | Clear | 8 to 12 mph NNW | 0% |
| Saturday | 91°F | Sunny | 6 to 10 mph NW | 0% |
| Saturday Night | 56°F | Mostly Clear | 9 mph NNE | 0% |
| Sunday | 86°F | Mostly Sunny | 6 to 10 mph N | 1% |
| Sunday Night | 55°F | Partly Cloudy | 7 to 12 mph NNE | 7% |
| Monday | 84°F | Mostly Sunny | 7 to 10 mph NE | 5% |
| Monday Night | 54°F | Mostly Clear | 8 to 12 mph NE | 12% |
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 Aug 4, 2026.