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Windham, MT Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Windham, a community in Judith Basin County, Montana.

Tonight
51°F
Chance Showers And Thunderstorms then Rain Likely
A chance of showers and thunderstorms before 9pm, then rain likely. Cloudy, with a low around 51. North northwest wind 2 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

7-day forecast for Windham

WhenTempForecastWindPrecip
Tonight 51°F Chance Showers And Thunderstorms then Rain Likely 2 to 10 mph NNW 67%
Saturday 59°F Rain 6 to 9 mph N 76%
Saturday Night 47°F Rain Likely 2 to 7 mph WSW 63%
Sunday 67°F Slight Chance Light Rain then Partly Sunny 2 to 6 mph SSW 19%
Sunday Night 46°F Mostly Clear 9 mph SSE 0%
Monday 75°F Sunny 6 mph SSE 0%
Monday Night 49°F Mostly Clear 7 to 13 mph SSW 1%
Tuesday 77°F Mostly Sunny 3 to 7 mph WNW 1%
Tuesday Night 50°F Mostly Clear 5 to 8 mph WNW 1%
Wednesday 77°F Sunny 5 to 8 mph WSW 2%
Wednesday Night 50°F Mostly Clear 6 to 9 mph WSW 1%
Thursday 79°F Sunny 5 to 9 mph S 2%
Thursday Night 52°F Mostly Clear 10 to 15 mph S 2%
Friday 80°F Mostly Sunny 7 to 10 mph SSW 1%

Forecast source: National Weather Service (api.weather.gov) for Windham (47.078, -110.139). Updated through the day.

Growing snapshot for Windham

Last spring frost
May 25
First fall frost
Sep 21
Growing season
118 days
Hardiness zone
4b

More local growing data for Windham: nearby ZIP 59479 weather · frost dates · planting calendar · Montana frost dates

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Climate data from the nearest NOAA station, Stanford, Mt (9.3 mi from Windham). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.