Whitewater, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Whitewater, a community in Phillips County, Montana.
This Afternoon
75°F
Sunny
Sunny, with a high near 75. North northeast wind around 12 mph, with gusts as high as 18 mph.
7-day forecast for Whitewater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 12 mph NNE | 0% |
| Tonight | 50°F | Mostly Cloudy | 6 to 12 mph NNE | 1% |
| Saturday | 70°F | Mostly Cloudy | 6 to 13 mph NE | 8% |
| Saturday Night | 48°F | Cloudy | 5 to 8 mph E | 9% |
| Sunday | 66°F | Mostly Cloudy | 5 to 10 mph SE | 7% |
| Sunday Night | 48°F | Partly Cloudy | 7 to 12 mph SE | 3% |
| Monday | 73°F | Partly Sunny | 8 to 16 mph SSE | 3% |
| Monday Night | 50°F | Partly Cloudy | 9 to 14 mph SE | 0% |
| Tuesday | 77°F | Mostly Sunny | 8 mph SSE | 0% |
| Tuesday Night | 50°F | Mostly Clear | 2 to 6 mph SE | 1% |
| Wednesday | 78°F | Mostly Sunny | 2 to 10 mph S | 2% |
| Wednesday Night | 50°F | Mostly Clear | 2 to 6 mph SSE | 4% |
| Thursday | 78°F | Sunny | 3 to 9 mph SE | 1% |
| Thursday Night | 51°F | Mostly Clear | 8 mph SE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Whitewater (48.763, -107.630). Updated through the day.
Growing snapshot for Whitewater
Last spring frost
May 19
First fall frost
Sep 22
Growing season
124 days
Hardiness zone
3b
More local growing data for Whitewater: nearby ZIP 59544 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Port Of Morgan, Mt (18.4 mi from Whitewater). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.