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Flathead Lake, MT Weather Forecast

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Flathead Lake, MT Weather Forecast

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Flathead Lake MT weather - Overcast - 39°F
Overcast
39°F
Updated 10:36 pm
Feels Like 28°F
Humidity 85%
Wind N 0 mph
Barometer  30.02 in
Dew Point 35°F
Flathead Lake MT weather - Overcast - 4°C
Overcast
4°C
Updated 10:36 pm
Feels Like -2°C
Humidity 85%
Wind N 0 km/h
Barometer  101.7 kPa
Dew Point 2°C
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Flathead Lake Weather Forecast

TONIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY
Flathead Lake, MT Weather - Tonight Patchy Fog Flathead Lake, MT Weather - Sunday Chance Of Rain Flathead Lake, MT Weather - Sunday Night Patchy Fog Flathead Lake, MT Weather - Monday Patchy Fog Flathead Lake, MT Weather - Monday Night Partly Cloudy Flathead Lake, MT Weather - Tuesday Mostly Cloudy Flathead Lake, MT Weather - Tuesday Night Mostly Cloudy Flathead Lake, MT Weather - Wednesday Partly Cloudy Flathead Lake, MT Weather - Wednesday Night Partly Cloudy Flathead Lake, MT Weather - Thursday Chance Of Snow Flathead Lake, MT Weather - Thursday Night Chance Of Rain Flathead Lake, MT Weather - Friday Chance Of Rain
Patchy Fog Chance of Rain Patchy Fog Patchy Fog Partly Cloudy Mostly Cloudy Mostly Cloudy Partly Cloudy Partly Cloudy Chance of Snow Chance of Rain Chance of Rain
Lo: 26°FLo: -3°C Hi: 46°FHi: 8°C
 Lo: 26°FLo: -3°C Hi: 46°FHi: 8°C
 Lo: 26°FLo: -3°C Hi: 46°FHi: 8°C
 Lo: 26°FLo: -3°C Hi: 46°FHi: 8°C
 Lo: 30°FLo: -1°C Hi: 46°FHi: 8°C
 Lo: 30°FLo: -1°C Hi: 46°FHi: 8°C
POP: 20% POP: 20% POP: 20% POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 116 PM MDT Sat Oct 31 2026 Flathead Lake, MT Weather - WeatherWorld.com

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Flathead Lake Forecast Discussion

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Issued: 1229 PM MDT Sat Oct 31 2026

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KEY MESSAGES:
  • Valley rain and mountain snow Sunday into Monday morning, focused along and south of I-90. Northwest Montana stays mostly dry.
  • High pressure bringing stable conditions and valley fog next week.
  • Potential return to unsettled pattern with chances for mountain snow by next weekend (Nov. 7-8).

A broad low pressure system continues to spin along the Pacific Northwest coast this morning, with southerly flow transporting atmospheric moisture and cloud cover across the Northern...