Libby, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Libby, a city in Lincoln County, Montana.
Tonight
46°F
Partly Cloudy
Partly cloudy, with a low around 46. Northwest wind around 1 mph.
7-day forecast for Libby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Partly Cloudy | 1 mph NW | 1% |
| Saturday | 83°F | Sunny | 0 mph | 2% |
| Saturday Night | 47°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 83°F | Sunny | 0 mph | 0% |
| Sunday Night | 48°F | Clear | 0 mph | 0% |
| Monday | 84°F | Sunny | 0 mph | 0% |
| Monday Night | 48°F | Mostly Clear | 1 mph NW | 0% |
| Tuesday | 81°F | Sunny | 0 mph | 0% |
| Tuesday Night | 47°F | Partly Cloudy | 0 mph | 1% |
| Wednesday | 77°F | Mostly Sunny | 1 mph WSW | 1% |
| Wednesday Night | 46°F | Partly Cloudy | 0 mph | 0% |
| Thursday | 79°F | Mostly Sunny | 0 mph | 1% |
| Thursday Night | 48°F | Partly Cloudy | 0 mph | 5% |
| Friday | 77°F | Partly Sunny | 1 mph WSW | 8% |
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 Sep 19, 2026.