Jeffers, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jeffers, a community in Madison County, Montana.
This Afternoon
69°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. High near 69, with temperatures falling to around 66 in the afternoon. Northwest wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Jeffers
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Showers And Thunderstorms | 7 mph NW | 83% |
| Tonight | 47°F | Showers And Thunderstorms | 2 to 8 mph NNW | 89% |
| Saturday | 58°F | Showers And Thunderstorms | 1 to 10 mph W | 94% |
| Saturday Night | 44°F | Showers And Thunderstorms Likely then Chance Light Rain | 1 to 10 mph W | 58% |
| Sunday | 70°F | Areas Of Fog then Partly Sunny | 2 mph SW | 13% |
| Sunday Night | 41°F | Mostly Clear | 3 to 7 mph SE | 1% |
| Monday | 77°F | Sunny | 1 to 6 mph SW | 0% |
| Monday Night | 45°F | Mostly Clear | 6 mph S | 1% |
| Tuesday | 77°F | Mostly Sunny | 0 to 5 mph SSW | 1% |
| Tuesday Night | 46°F | Partly Cloudy | 7 mph S | 6% |
| Wednesday | 77°F | Sunny | 2 to 6 mph SSW | 4% |
| Wednesday Night | 46°F | Mostly Clear | 5 to 12 mph S | 1% |
| Thursday | 79°F | Sunny | 3 to 8 mph S | 2% |
| Thursday Night | 47°F | Partly Cloudy | 6 to 15 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov) for Jeffers (45.348, -111.704). Updated through the day.
Growing snapshot for Jeffers
Last spring frost
Jun 16
First fall frost
Sep 4
Growing season
78 days
Hardiness zone
5a
More local growing data for Jeffers: nearby ZIP 59729 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Alder
Big Sky
Brandon
Ennis
Harrison
Mammoth
McAllister
Norris
Pony
Sheridan
Silver Star
Twin Bridges
Virginia City
Climate data from the nearest NOAA station, Ennis, Mt (3.1 mi from Jeffers). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.