Joliet, MT Weather & Growing Conditions
Tonight
28°F
Mostly Clear
Mostly clear. Low around 28, with temperatures rising to around 31 overnight. Southwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 28°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Wednesday | 52°F | Sunny | 2 to 6 mph WNW | 0% |
| Wednesday Night | 30°F | Partly Cloudy | 2 to 14 mph NW | 0% |
| Thursday | 55°F | Sunny | 3 to 15 mph SW | 3% |
| Thursday Night | 31°F | Partly Cloudy | 6 mph WSW | 4% |
| Friday | 54°F | Sunny | 5 to 13 mph SSW | 1% |
| Friday Night | 34°F | Partly Cloudy | 10 to 15 mph SSW | 1% |
| Saturday | 57°F | Sunny | 10 to 14 mph SSW | 0% |
| Saturday Night | 37°F | Partly Cloudy | 10 to 23 mph SSW | 0% |
| Sunday | 62°F | Mostly Sunny | 15 to 24 mph SSW | 0% |
| Sunday Night | 36°F | Partly Cloudy | 5 to 15 mph SW | 0% |
| Monday | 57°F | Mostly Sunny | 5 mph SSE | 1% |
| Monday Night | 34°F | Partly Cloudy | 7 mph SSW | 1% |
| Tuesday | 60°F | Mostly Sunny | 8 mph SW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Joliet, MT
Last spring frost
May 29
First fall frost
Sep 15
Growing season
107 days
Hardiness zone
5a
Explore more for Joliet, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Joliet, Mt (2.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.