Hardin, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hardin, a city in Big Horn County, Montana.
Overnight
27°F
Patchy Fog
Patchy fog. Mostly clear, with a low around 27. South southwest wind around 2 mph.
7-day forecast for Hardin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 27°F | Patchy Fog | 2 mph SSW | 0% |
| Wednesday | 52°F | Patchy Fog then Sunny | 2 mph W | 0% |
| Wednesday Night | 27°F | Patchy Fog | 2 mph SE | 0% |
| Thursday | 55°F | Patchy Fog then Mostly Sunny | 2 mph SSW | 0% |
| Thursday Night | 32°F | Mostly Cloudy | 2 mph WSW | 6% |
| Friday | 56°F | Sunny | 2 to 6 mph SW | 0% |
| Friday Night | 33°F | Partly Cloudy | 6 mph SW | 0% |
| Saturday | 61°F | Sunny | 2 to 6 mph WSW | 0% |
| Saturday Night | 31°F | Mostly Clear | 3 mph S | 0% |
| Sunday | 67°F | Mostly Sunny | 3 mph WSW | 0% |
| Sunday Night | 35°F | Mostly Cloudy | 2 mph WSW | 0% |
| Monday | 58°F | Mostly Sunny | 3 mph WSW | 1% |
| Monday Night | 33°F | Partly Cloudy | 2 mph SSE | 1% |
| Tuesday | 62°F | Mostly Sunny | 3 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Hardin (45.742, -107.608). Updated through the day.
Growing snapshot for Hardin
Last spring frost
May 13
First fall frost
Sep 29
Growing season
135 days
Hardiness zone
4b
More local growing data for Hardin: nearby ZIP 59034 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hardin, Mt (8.7 mi from Hardin). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.