Harlowton, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harlowton, a city in Wheatland County, Montana.
Today
52°F
Sunny
Sunny. High near 52, with temperatures falling to around 45 in the afternoon. South southwest wind around 7 mph.
7-day forecast for Harlowton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Sunny | 7 mph SSW | 0% |
| Tonight | 27°F | Mostly Clear | 3 to 8 mph WNW | 0% |
| Wednesday | 54°F | Sunny | 2 to 8 mph NE | 0% |
| Wednesday Night | 27°F | Mostly Clear | 3 to 7 mph SW | 0% |
| Thursday | 56°F | Sunny | 7 to 14 mph W | 4% |
| Thursday Night | 30°F | Partly Cloudy | 12 to 16 mph W | 4% |
| Friday | 55°F | Sunny | 14 to 22 mph W | 7% |
| Friday Night | 35°F | Partly Cloudy | 14 to 23 mph W | 7% |
| Saturday | 59°F | Sunny | 6 to 20 mph W | 0% |
| Saturday Night | 33°F | Partly Cloudy | 6 to 10 mph WSW | 0% |
| Sunday | 63°F | Mostly Sunny | 7 to 12 mph W | 0% |
| Sunday Night | 35°F | Partly Cloudy | 7 to 16 mph W | 0% |
| Monday | 56°F | Mostly Sunny | 3 to 12 mph SW | 0% |
| Monday Night | 33°F | Partly Cloudy | 3 to 10 mph SSW | 1% |
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 Nov 3, 2026.