Harlowton, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harlowton, a city in Wheatland County, Montana.
Today
75°F
Sunny
Sunny, with a high near 75. Southeast wind 2 to 7 mph.
7-day forecast for Harlowton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Sunny | 2 to 7 mph SE | 0% |
| Tonight | 44°F | Mostly Clear | 2 to 8 mph NNE | 2% |
| Wednesday | 84°F | Sunny | 7 to 15 mph WNW | 0% |
| Wednesday Night | 49°F | Mostly Clear | 5 to 14 mph NW | 0% |
| Thursday | 90°F | Sunny | 7 to 17 mph WNW | 0% |
| Thursday Night | 53°F | Mostly Clear | 5 to 17 mph WNW | 0% |
| Friday | 95°F | Sunny | 6 to 18 mph W | 0% |
| Friday Night | 56°F | Mostly Clear | 12 to 22 mph NW | 0% |
| Saturday | 93°F | Sunny | 15 to 21 mph WNW | 0% |
| Saturday Night | 55°F | Mostly Clear | 6 to 15 mph NW | 3% |
| Sunday | 90°F | Sunny | 10 to 14 mph NNW | 2% |
| Sunday Night | 55°F | Partly Cloudy | 7 to 16 mph N | 5% |
| Monday | 87°F | Sunny | 7 to 14 mph NNE | 6% |
| Monday Night | 55°F | Partly Cloudy | 7 to 16 mph NNE | 11% |
Forecast source: National Weather Service (api.weather.gov) for Harlowton (46.437, -109.835). Updated through the day.
Growing snapshot for Harlowton
Last spring frost
May 23
First fall frost
Sep 16
Growing season
113 days
Hardiness zone
4b
More local growing data for Harlowton: nearby ZIP 59036 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Harlowton, Mt (2.6 mi from Harlowton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.