Joliet, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Joliet, a town in Carbon County, Montana.
Tonight
28°F
Mostly Clear
Mostly clear. Low around 28, with temperatures rising to around 30 overnight. West southwest wind 5 to 10 mph.
7-day forecast for Joliet
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 28°F | Mostly Clear | 5 to 10 mph WSW | 0% |
| Wednesday | 53°F | Sunny | 2 to 6 mph WNW | 0% |
| Wednesday Night | 30°F | Partly Cloudy | 2 to 14 mph WNW | 0% |
| Thursday | 56°F | Sunny | 2 to 14 mph SW | 3% |
| Thursday Night | 31°F | Partly Cloudy | 5 mph WSW | 4% |
| Friday | 55°F | Sunny | 5 to 13 mph SSW | 1% |
| Friday Night | 34°F | Partly Cloudy | 10 to 14 mph SSW | 1% |
| Saturday | 58°F | Sunny | 10 to 14 mph SSW | 0% |
| Saturday Night | 37°F | Partly Cloudy | 10 to 23 mph SSW | 0% |
| Sunday | 63°F | Mostly Sunny | 14 to 24 mph SSW | 0% |
| Sunday Night | 35°F | Partly Cloudy | 5 to 14 mph SW | 0% |
| Monday | 59°F | Mostly Sunny | 5 mph SSE | 1% |
| Monday Night | 34°F | Partly Cloudy | 7 mph S | 1% |
| Tuesday | 61°F | Mostly Sunny | 8 mph SW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Joliet (45.484, -108.972). Updated through the day.
Growing snapshot for Joliet
Last spring frost
May 29
First fall frost
Sep 15
Growing season
107 days
Hardiness zone
5a
More local growing data for Joliet: nearby ZIP 59041 weather · frost dates · planting calendar · Montana frost dates
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Climate data from the nearest NOAA station, Joliet, Mt (2.8 mi from Joliet). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.