Chester, MT Weather & Growing Conditions
This Afternoon
69°F
Mostly Sunny
Mostly sunny, with a high near 69. Southeast wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Mostly Sunny | 8 mph SE | 1% |
| Tonight | 44°F | Partly Cloudy | 2 to 7 mph ESE | 1% |
| Sunday | 71°F | Sunny | 2 to 8 mph SSE | 1% |
| Sunday Night | 46°F | Partly Cloudy | 3 to 7 mph SE | 0% |
| Monday | 77°F | Mostly Sunny | 3 to 9 mph SSE | 0% |
| Monday Night | 47°F | Mostly Clear | 1 to 7 mph SSE | 0% |
| Tuesday | 78°F | Sunny | 1 to 6 mph SW | 0% |
| Tuesday Night | 50°F | Mostly Clear | 3 mph SW | 0% |
| Wednesday | 78°F | Mostly Sunny | 1 to 6 mph WSW | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 5 mph W | 13% |
| Thursday | 74°F | Mostly Sunny | 2 to 6 mph W | 2% |
| Thursday Night | 48°F | Partly Cloudy | 6 mph ENE | 8% |
| Friday | 72°F | Mostly Sunny | 3 to 8 mph ESE | 8% |
| Friday Night | 45°F | Slight Chance Light Rain | 9 mph NNW | 19% |
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.