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Long Lake, MT Weather Forecast

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Long Lake, MT Weather Forecast

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Long Lake MT weather - Clear - 49°F
Clear
49°F
Updated 12:17 am
Feels Like 49°F
Humidity 100%
Wind N 0 mph
Barometer  29.95 in
Dew Point 49°F
Long Lake MT weather - Clear - 9°C
Clear
9°C
Updated 12:17 am
Feels Like 9°C
Humidity 100%
Wind N 0 km/h
Barometer  101.4 kPa
Dew Point 9°C
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Long Lake Weather Forecast

TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY
Long Lake, MT Weather - Tonight Partly Cloudy Long Lake, MT Weather - Wednesday Partly Cloudy Long Lake, MT Weather - Wednesday Night Mostly Cloudy Long Lake, MT Weather - Thursday Partly Cloudy Long Lake, MT Weather - Thursday Night Partly Cloudy Long Lake, MT Weather - Friday Chance Of Rain Long Lake, MT Weather - Friday Night Chance Of Rain Long Lake, MT Weather - Saturday Chance Of Rain Long Lake, MT Weather - Saturday Night Partly Cloudy Long Lake, MT Weather - Sunday Mostly Cloudy Long Lake, MT Weather - Sunday Night Mostly Cloudy Long Lake, MT Weather - Monday Mostly Cloudy
Partly Cloudy Partly Cloudy Mostly Cloudy Partly Cloudy Partly Cloudy Chance of Rain Chance of Rain Chance of Rain Partly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy
Lo: 45°FLo: 7°C Hi: 70°FHi: 21°C
 Lo: 45°FLo: 7°C Hi: 76°FHi: 24°C
 Lo: 46°FLo: 8°C Hi: 70°FHi: 21°C
 Lo: 36°FLo: 2°C Hi: 56°FHi: 13°C
 Lo: 36°FLo: 2°C Hi: 60°FHi: 16°C
 Lo: 36°FLo: 2°C Hi: 60°FHi: 16°C
POP: 50% POP: 50% POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 PM MDT Tue Sep 22 2026 Long Lake, MT Weather - WeatherWorld.com

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Long Lake Forecast Discussion

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Issued: 1240 PM MDT Tue Sep 22 2026

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KEY MESSAGES:
  • Unseasonable warmth through the rest of the week, with scattered afternoon thunderstorms in Southwest Montana and Lemhi County today.
  • Cold front Friday brings widespread gusty winds, transitioning to a much cooler, breezy, and showery weekend.

Unseasonably warm and mostly dry conditions will persist across the Northern Rockies today, with valley temperatures running 10 to 15 degrees above seasonal averages. An upper-level shortwave lifting northeastward will interact wi...