Zortman, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Zortman, a community in Phillips County, Montana.
This Afternoon
72°F
Mostly Sunny
Mostly sunny, with a high near 72. North wind around 9 mph.
7-day forecast for Zortman
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Mostly Sunny | 9 mph N | 2% |
| Tonight | 53°F | Mostly Cloudy | 9 to 13 mph NNE | 10% |
| Saturday | 63°F | Chance Rain Showers | 12 mph NE | 28% |
| Saturday Night | 51°F | Chance Rain Showers | 8 mph ENE | 53% |
| Sunday | 62°F | Chance Rain Showers | 8 mph E | 35% |
| Sunday Night | 51°F | Mostly Cloudy | 9 mph ESE | 6% |
| Monday | 68°F | Partly Sunny | 7 to 12 mph SE | 1% |
| Monday Night | 53°F | Mostly Clear | 8 to 12 mph SSE | 0% |
| Tuesday | 74°F | Sunny | 6 mph WSW | 0% |
| Tuesday Night | 55°F | Mostly Clear | 6 mph S | 0% |
| Wednesday | 75°F | Sunny | 5 to 8 mph SW | 2% |
| Wednesday Night | 55°F | Mostly Clear | 6 mph SSE | 2% |
| Thursday | 75°F | Sunny | 5 to 9 mph SSE | 1% |
| Thursday Night | 56°F | Mostly Clear | 9 mph SSE | 3% |
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 Sep 19, 2026.