Hardin, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hardin, a city in Big Horn County, Montana.
Tonight
54°F
Showers And Thunderstorms
Showers and thunderstorms before midnight, then patchy fog and showers and thunderstorms. Cloudy. Low around 54, with temperatures rising to around 56 overnight. Northwest wind 3 to 7 mph. Chance of precipitation is 90%.
7-day forecast for Hardin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Showers And Thunderstorms | 3 to 7 mph NW | 92% |
| Saturday | 64°F | Showers And Thunderstorms | 6 to 12 mph N | 95% |
| Saturday Night | 50°F | Showers And Thunderstorms | 9 mph NNE | 91% |
| Sunday | 64°F | Rain Showers | 9 mph NW | 81% |
| Sunday Night | 47°F | Slight Chance Rain Showers then Mostly Cloudy | 1 to 6 mph N | 22% |
| Monday | 74°F | Mostly Sunny | 3 mph SSE | 0% |
| Monday Night | 46°F | Mostly Clear | 5 mph SE | 0% |
| Tuesday | 80°F | Sunny | 2 mph SW | 0% |
| Tuesday Night | 48°F | Partly Cloudy | 3 mph ESE | 8% |
| Wednesday | 81°F | Mostly Sunny | 3 mph WSW | 4% |
| Wednesday Night | 47°F | Mostly Clear | 2 mph SE | 4% |
| Thursday | 82°F | Sunny | 3 mph S | 2% |
| Thursday Night | 48°F | Mostly Clear | 3 mph ESE | 1% |
| Friday | 82°F | Mostly Sunny | 3 mph SSE | 4% |
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 Sep 19, 2026.