Libby, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Libby, a city in Lincoln County, Montana.
This Afternoon
48°F
Mostly Cloudy
Mostly cloudy. High near 48, with temperatures falling to around 43 in the afternoon. Wind around 0 mph.
7-day forecast for Libby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 48°F | Mostly Cloudy | 0 mph | 0% |
| Tonight | 28°F | Mostly Cloudy | 0 mph | 0% |
| Wednesday | 52°F | Mostly Sunny | 0 mph | 0% |
| Wednesday Night | 28°F | Partly Cloudy then Slight Chance Light Snow | 0 mph | 17% |
| Thursday | 46°F | Slight Chance Light Snow then Chance Rain And Snow | 0 mph | 25% |
| Thursday Night | 31°F | Mostly Cloudy | 1 mph SSW | 9% |
| Friday | 51°F | Mostly Cloudy then Chance Light Rain | 1 mph SW | 27% |
| Friday Night | 33°F | Chance Light Rain | 2 mph SW | 27% |
| Saturday | 55°F | Partly Sunny | 0 mph | 11% |
| Saturday Night | 34°F | Mostly Cloudy then Light Rain Likely | 0 mph | 62% |
| Sunday | 55°F | Light Rain Likely | 0 to 3 mph SSW | 62% |
| Sunday Night | 33°F | Chance Light Rain | 1 mph SW | 26% |
| Monday | 52°F | Partly Sunny then Chance Light Rain | 0 mph | 28% |
| Monday Night | 34°F | Chance Light Rain | 0 mph | 28% |
Forecast source: National Weather Service (api.weather.gov) for Libby (48.386, -115.557). Updated through the day.
Growing snapshot for Libby
Last spring frost
May 11
First fall frost
Oct 1
Growing season
142 days
Hardiness zone
6a
More local growing data for Libby: nearby ZIP 59923 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Eureka
Fortine
Happys Inn
Indian Springs
Pioneer Junction
Rexford
Stryker
Sylvanite
Trego
Troy
West Kootenai
White Haven
Yaak
Climate data from the nearest NOAA station, Libby Dam (Base), Mt (9.6 mi from Libby). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.