Whitewater, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Whitewater, a community in Phillips County, Montana.
Today
77°F
Sunny
Sunny, with a high near 77. Northwest wind 5 to 13 mph, with gusts as high as 21 mph.
7-day forecast for Whitewater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Sunny | 5 to 13 mph NW | 1% |
| Tonight | 47°F | Partly Cloudy | 1 to 12 mph SW | 1% |
| Wednesday | 85°F | Mostly Sunny | 2 to 15 mph W | 0% |
| Wednesday Night | 49°F | Partly Cloudy | 1 to 15 mph NW | 0% |
| Thursday | 91°F | Sunny | 0 to 12 mph NNW | 0% |
| Thursday Night | 51°F | Mostly Clear | 5 to 15 mph N | 1% |
| Friday | 90°F | Sunny | 7 mph ESE | 0% |
| Friday Night | 54°F | Mostly Clear | 8 to 12 mph NE | 1% |
| Saturday | 90°F | Sunny | 10 mph NE | 0% |
| Saturday Night | 55°F | Partly Cloudy | 8 to 12 mph NE | 8% |
| Sunday | 88°F | Mostly Sunny | 9 to 13 mph NE | 3% |
| Sunday Night | 54°F | Partly Cloudy then Slight Chance Rain Showers | 9 to 13 mph NNE | 17% |
| Monday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 10 mph NE | 18% |
| Monday Night | 54°F | Chance Showers And Thunderstorms | 12 mph ENE | 28% |
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 Aug 4, 2026.