Harman US

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

WhenTempForecastWindPrecip
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

All Montana locations ›

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.