Hardin, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hardin, a city in Big Horn County, Montana.
Today
79°F
Sunny
Sunny, with a high near 79. East wind 1 to 6 mph.
7-day forecast for Hardin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Sunny | 1 to 6 mph E | 0% |
| Tonight | 48°F | Mostly Clear | 2 to 6 mph ESE | 1% |
| Wednesday | 88°F | Sunny | 2 to 6 mph WSW | 0% |
| Wednesday Night | 52°F | Mostly Clear | 2 to 7 mph E | 0% |
| Thursday | 95°F | Sunny | 2 to 7 mph WSW | 0% |
| Thursday Night | 56°F | Mostly Clear | 2 to 8 mph NE | 0% |
| Friday | 101°F | Sunny | 2 to 6 mph WSW | 0% |
| Friday Night | 60°F | Mostly Clear | 3 to 8 mph N | 0% |
| Saturday | 98°F | Sunny | 3 to 12 mph WNW | 0% |
| Saturday Night | 61°F | Mostly Clear | 5 to 10 mph ENE | 0% |
| Sunday | 96°F | Sunny | 3 to 10 mph NNW | 0% |
| Sunday Night | 61°F | Partly Cloudy | 6 to 9 mph NE | 6% |
| Monday | 94°F | Mostly Sunny | 5 to 12 mph NNE | 3% |
| Monday Night | 62°F | Partly Cloudy | 8 to 13 mph ENE | 11% |
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 Aug 4, 2026.