Hardin, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hardin, a city in Big Horn County, Montana.
This Afternoon
52°F
Mostly Sunny
Mostly sunny. High near 52, with temperatures falling to around 46 in the afternoon. North northeast wind around 3 mph.
7-day forecast for Hardin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Mostly Sunny | 3 mph NNE | 0% |
| Tonight | 28°F | Patchy Fog | 5 mph ENE | 0% |
| Thursday | 54°F | Patchy Fog then Mostly Sunny | 1 to 6 mph WSW | 0% |
| Thursday Night | 31°F | Mostly Cloudy | 2 to 6 mph SW | 8% |
| Friday | 55°F | Sunny | 5 mph SW | 0% |
| Friday Night | 32°F | Mostly Clear | 5 mph SSW | 0% |
| Saturday | 61°F | Sunny | 5 mph SW | 0% |
| Saturday Night | 32°F | Mostly Clear | 3 mph S | 0% |
| Sunday | 66°F | Mostly Sunny | 5 mph SW | 0% |
| Sunday Night | 35°F | Mostly Cloudy | 2 mph SW | 0% |
| Monday | 59°F | Mostly Sunny | 1 to 5 mph ESE | 1% |
| Monday Night | 33°F | Mostly Cloudy | 2 mph SE | 0% |
| Tuesday | 61°F | Mostly Sunny | 3 mph SW | 1% |
| Tuesday Night | 35°F | Partly Cloudy | 2 mph SSW | 1% |
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 5, 2026.