Zortman, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Zortman, a community in Phillips County, Montana.
Overnight
47°F
Mostly Clear
Mostly clear, with a low around 47. West wind around 7 mph.
7-day forecast for Zortman
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Mostly Clear | 7 mph W | 0% |
| Tuesday | 72°F | Sunny | 7 to 10 mph WNW | 0% |
| Tuesday Night | 53°F | Partly Cloudy | 3 to 8 mph WNW | 2% |
| Wednesday | 81°F | Mostly Sunny | 7 to 13 mph W | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 3 to 12 mph W | 0% |
| Thursday | 87°F | Sunny | 5 to 12 mph W | 0% |
| Thursday Night | 61°F | Mostly Clear | 6 to 13 mph NNE | 0% |
| Friday | 89°F | Sunny | 6 to 9 mph ESE | 0% |
| Friday Night | 63°F | Mostly Clear | 10 mph N | 0% |
| Saturday | 87°F | Sunny | 12 mph WNW | 0% |
| Saturday Night | 63°F | Partly Cloudy | 9 mph NNE | 1% |
| Sunday | 86°F | Mostly Sunny | 8 to 12 mph NNE | 1% |
| Sunday Night | 61°F | Partly Cloudy | 9 to 13 mph NNE | 13% |
| Monday | 82°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 10 mph NE | 18% |
Forecast source: National Weather Service (api.weather.gov) for Zortman (47.917, -108.509). Updated through the day.
Growing snapshot for Zortman
Last spring frost
May 18
First fall frost
Sep 23
Growing season
126 days
Hardiness zone
4b
More local growing data for Zortman: nearby ZIP 59546 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Zortman, Mt (1.5 mi from Zortman). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.