Chinook, MT Weather & Growing Conditions
This Afternoon
76°F
Mostly Sunny
Mostly sunny, with a high near 76. North wind around 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Mostly Sunny | 9 mph N | 1% |
| Tonight | 51°F | Mostly Cloudy | 3 to 9 mph E | 2% |
| Saturday | 69°F | Cloudy | 3 to 12 mph ENE | 8% |
| Saturday Night | 51°F | Mostly Cloudy | 6 to 9 mph ESE | 7% |
| Sunday | 70°F | Partly Sunny | 6 to 13 mph ESE | 2% |
| Sunday Night | 50°F | Mostly Clear | 10 to 14 mph SE | 0% |
| Monday | 76°F | Sunny | 9 to 14 mph SE | 0% |
| Monday Night | 51°F | Mostly Clear | 6 to 13 mph SE | 0% |
| Tuesday | 78°F | Sunny | 2 to 7 mph WSW | 0% |
| Tuesday Night | 51°F | Mostly Clear | 6 mph S | 1% |
| Wednesday | 79°F | Sunny | 3 to 9 mph SW | 2% |
| Wednesday Night | 51°F | Mostly Clear | 6 mph S | 1% |
| Thursday | 80°F | Sunny | 3 to 8 mph SE | 2% |
| Thursday Night | 53°F | Partly Cloudy | 10 mph SE | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Chinook, MT
Last spring frost
May 14
First fall frost
Sep 23
Growing season
130 days
Hardiness zone
3b
Explore more for Chinook, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Chinook, Mt (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.