Hardin, MT Weather & Growing Conditions
Overnight
28°F
Patchy Fog
Patchy fog. Mostly clear, with a low around 28. West southwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 28°F | Patchy Fog | 2 mph WSW | 0% |
| Wednesday | 51°F | Patchy Fog then Sunny | 3 mph WNW | 0% |
| Wednesday Night | 29°F | Patchy Fog | 3 mph SW | 0% |
| Thursday | 55°F | Patchy Fog then Mostly Sunny | 3 mph WSW | 0% |
| Thursday Night | 34°F | Mostly Cloudy | 2 to 6 mph WSW | 11% |
| Friday | 56°F | Sunny | 7 mph WSW | 0% |
| Friday Night | 35°F | Partly Cloudy | 5 to 8 mph SW | 0% |
| Saturday | 61°F | Sunny | 3 to 7 mph WSW | 0% |
| Saturday Night | 33°F | Mostly Clear | 5 mph SSW | 0% |
| Sunday | 66°F | Mostly Sunny | 6 mph WSW | 0% |
| Sunday Night | 37°F | Mostly Cloudy | 5 mph WNW | 0% |
| Monday | 58°F | Mostly Sunny | 5 mph W | 1% |
| Monday Night | 35°F | Partly Cloudy | 3 mph SSE | 1% |
| Tuesday | 62°F | Mostly Sunny | 5 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hardin, MT
Last spring frost
May 13
First fall frost
Sep 29
Growing season
135 days
Hardiness zone
4b
Explore more for Hardin, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Hardin, Mt (8.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.