Libby, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Libby, a city in Lincoln County, Montana.
Today
87°F
Mostly Sunny
Mostly sunny, with a high near 87. Northwest wind around 1 mph.
7-day forecast for Libby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny | 1 mph NW | 0% |
| Tonight | 46°F | Mostly Clear | 2 mph NW | 0% |
| Wednesday | 93°F | Sunny then Patchy Smoke | 2 mph WNW | 0% |
| Wednesday Night | 49°F | Patchy Smoke then Mostly Clear | 2 mph WSW | 0% |
| Thursday | 99°F | Sunny | 2 mph WNW | 0% |
| Thursday Night | 53°F | Mostly Clear | 0 to 3 mph NW | 0% |
| Friday | 99°F | Sunny | 0 to 5 mph WNW | 0% |
| Friday Night | 53°F | Mostly Clear | 0 to 6 mph SW | 0% |
| Saturday | 95°F | Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 52°F | Mostly Clear | 0 to 5 mph WSW | 0% |
| Sunday | 93°F | Sunny | 2 mph W | 0% |
| Sunday Night | 50°F | Mostly Clear | 0 to 3 mph NW | 0% |
| Monday | 92°F | Sunny | 2 mph NW | 0% |
| Monday Night | 49°F | Mostly Clear | 2 mph WNW | 1% |
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
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Happys Inn
Indian Springs
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Stryker
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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 Aug 4, 2026.