Harman US

Jeffers, MT Weather & Growing Conditions

Tonight
46°F
Showers And Thunderstorms
Showers and thunderstorms before midnight, then patchy fog and showers and thunderstorms likely. Cloudy, with a low around 46. North northwest wind 1 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Tonight 46°F Showers And Thunderstorms 1 to 5 mph NNW 78%
Saturday 57°F Patchy Fog 1 to 10 mph W 94%
Saturday Night 44°F Showers And Thunderstorms Likely then Chance Light Rain 0 to 10 mph WNW 58%
Sunday 68°F Areas Of Fog then Partly Sunny 0 to 3 mph WNW 14%
Sunday Night 42°F Mostly Clear 6 mph ESE 1%
Monday 76°F Sunny 1 to 5 mph SSW 0%
Monday Night 45°F Mostly Clear 3 to 7 mph SSE 1%
Tuesday 76°F Mostly Sunny 0 to 5 mph SSW 1%
Tuesday Night 46°F Partly Cloudy 7 mph S 6%
Wednesday 76°F Sunny 2 to 6 mph SSW 4%
Wednesday Night 46°F Mostly Clear 5 to 13 mph S 1%
Thursday 78°F Sunny 3 to 9 mph S 3%
Thursday Night 48°F Partly Cloudy 7 to 16 mph S 1%
Friday 79°F Mostly Sunny 7 to 12 mph S 1%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Jeffers, MT

Last spring frost
Jun 16
First fall frost
Sep 4
Growing season
78 days
Hardiness zone
5a

Explore more for Jeffers, MT: full frost dates · planting calendar · Montana frost dates

Climate data from the nearest NOAA station, Ennis, Mt (3.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.