Harlowton, MT Weather & Growing Conditions
This Afternoon
52°F
Sunny
Sunny. High near 52, with temperatures falling to around 45 in the afternoon. South wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Sunny | 7 mph S | 0% |
| Tonight | 28°F | Mostly Clear | 3 to 8 mph WNW | 0% |
| Wednesday | 54°F | Sunny | 2 to 8 mph NNE | 0% |
| Wednesday Night | 27°F | Mostly Clear | 3 to 9 mph WSW | 0% |
| Thursday | 55°F | Sunny | 9 to 16 mph W | 4% |
| Thursday Night | 29°F | Partly Cloudy | 13 to 17 mph W | 4% |
| Friday | 54°F | Sunny | 15 to 24 mph W | 7% |
| Friday Night | 35°F | Partly Cloudy | 15 to 25 mph W | 7% |
| Saturday | 58°F | Sunny | 7 to 21 mph W | 0% |
| Saturday Night | 33°F | Partly Cloudy | 7 to 13 mph W | 0% |
| Sunday | 63°F | Mostly Sunny | 8 to 14 mph W | 0% |
| Sunday Night | 35°F | Partly Cloudy | 8 to 16 mph W | 0% |
| Monday | 56°F | Mostly Sunny | 3 to 13 mph WSW | 0% |
| Monday Night | 34°F | Partly Cloudy | 3 to 13 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harlowton, MT
Last spring frost
May 23
First fall frost
Sep 16
Growing season
113 days
Hardiness zone
4b
Explore more for Harlowton, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Harlowton, Mt (2.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.