Whitewater, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Whitewater, a community in Phillips County, Montana.
Tonight
28°F
Partly Cloudy
Partly cloudy, with a low around 28. East northeast wind 0 to 3 mph.
7-day forecast for Whitewater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 28°F | Partly Cloudy | 0 to 3 mph ENE | 0% |
| Wednesday | 48°F | Mostly Sunny | 2 mph NNW | 0% |
| Wednesday Night | 28°F | Mostly Cloudy | 0 to 3 mph ENE | 0% |
| Thursday | 49°F | Mostly Sunny | 3 to 7 mph S | 0% |
| Thursday Night | 32°F | Partly Cloudy | 7 mph WSW | 0% |
| Friday | 53°F | Sunny | 5 to 12 mph WSW | 3% |
| Friday Night | 35°F | Partly Cloudy | 12 mph WSW | 5% |
| Saturday | 55°F | Sunny | 5 to 13 mph WSW | 1% |
| Saturday Night | 32°F | Partly Cloudy | 5 mph S | 0% |
| Sunday | 60°F | Partly Sunny | 5 to 13 mph SSW | 1% |
| Sunday Night | 36°F | Partly Cloudy | 9 to 18 mph W | 1% |
| Monday | 53°F | Mostly Sunny | 5 to 9 mph W | 1% |
| Monday Night | 33°F | Partly Cloudy | 5 mph SSW | 1% |
| Tuesday | 56°F | Mostly Sunny | 3 to 9 mph SSW | 0% |
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 Nov 4, 2026.