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Mill Lake, MT Weather Forecast

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Mill Lake, MT Weather Forecast

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Mill Lake MT weather - Overcast - 64°F
Overcast
64°F
Updated 11:50 pm
Feels Like 52°F
Humidity 51%
Wind SSE 17 mph
Barometer  30.02 in
Dew Point 46°F
Mill Lake MT weather - Overcast - 18°C
Overcast
18°C
Updated 11:50 pm
Feels Like 11°C
Humidity 51%
Wind SSE 27 km/h
Barometer  101.6 kPa
Dew Point 8°C
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Mill Lake Weather Forecast

TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY
Mill Lake, MT Weather - Tonight Chance Of T-Storm Mill Lake, MT Weather - Wednesday Mostly Sunny Mill Lake, MT Weather - Wednesday Night Partly Cloudy Mill Lake, MT Weather - Thursday Mostly Sunny Mill Lake, MT Weather - Thursday Night Mostly Clear Mill Lake, MT Weather - Friday Chance Of Rain Mill Lake, MT Weather - Friday Night Chance Of Rain Mill Lake, MT Weather - Saturday Mostly Cloudy Mill Lake, MT Weather - Saturday Night Partly Cloudy Mill Lake, MT Weather - Sunday Mostly Cloudy Mill Lake, MT Weather - Sunday Night Chance Of Rain Mill Lake, MT Weather - Monday Mostly Cloudy
Chance of T-Storm Mostly Sunny Partly Cloudy Mostly Sunny Mostly Clear Chance of Rain Chance of Rain Mostly Cloudy Partly Cloudy Mostly Cloudy Chance of Rain Mostly Cloudy
Lo: 45°FLo: 7°C Hi: 66°FHi: 19°C
 Lo: 45°FLo: 7°C Hi: 75°FHi: 24°C
 Lo: 46°FLo: 8°C Hi: 70°FHi: 21°C
 Lo: 36°FLo: 2°C Hi: 50°FHi: 10°C
 Lo: 35°FLo: 2°C Hi: 56°FHi: 13°C
 Lo: 36°FLo: 2°C Hi: 55°FHi: 13°C
POP: 50% POP: 20% POP: 50% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 PM MDT Tue Sep 22 2026 Mill Lake, MT Weather - WeatherWorld.com

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Mill 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...