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Arch Lake, MT Weather Forecast

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Arch Lake, MT Weather Forecast

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Arch Lake MT weather - Clear - 33°F
Clear
33°F
Updated 5:26 am
Feels Like 24°F
Humidity 80%
Wind N 0 mph
Barometer  30.07 in
Dew Point 28°F
Arch Lake MT weather - Clear - 1°C
Clear
1°C
Updated 5:26 am
Feels Like -5°C
Humidity 80%
Wind N 0 km/h
Barometer  101.8 kPa
Dew Point -2°C
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Arch Lake Weather Forecast

TODAY TONIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT
Arch Lake, MT Weather - Today Increasing Clouds Arch Lake, MT Weather - Tonight Snow Showers Arch Lake, MT Weather - Friday Mostly Sunny Arch Lake, MT Weather - Friday Night Partly Cloudy Arch Lake, MT Weather - Saturday Sunny Arch Lake, MT Weather - Saturday Night Mostly Clear Arch Lake, MT Weather - Sunday Mostly Sunny Arch Lake, MT Weather - Sunday Night Partly Cloudy Arch Lake, MT Weather - Monday Mostly Sunny Arch Lake, MT Weather - Monday Night Partly Cloudy Arch Lake, MT Weather - Tuesday Mostly Sunny Arch Lake, MT Weather - Tuesday Night Mostly Clear
Increasing Clouds Snow Showers Mostly Sunny Partly Cloudy Sunny Mostly Clear Mostly Sunny Partly Cloudy Mostly Sunny Partly Cloudy Mostly Sunny Mostly Clear
Hi: 49°FHi: 9°C
 Lo: 25°FLo: -4°C Hi: 45°FHi: 7°C
 Lo: 21°FLo: -6°C Hi: 55°FHi: 13°C
 Lo: 29°FLo: -2°C Hi: 59°FHi: 15°C
 Lo: 29°FLo: -2°C Hi: 55°FHi: 13°C
 Lo: 29°FLo: -2°C Hi: 51°FHi: 11°C
 Lo: 25°FLo: -4°C
POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 351 AM MST Thu Nov 05 2026 Arch Lake, MT Weather - WeatherWorld.com

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Issued: 502 AM MST Thu Nov 5 2026

Key Messages

  • Patchy fog may bring reductions to visibility through early this morning.
  • Mainly dry this week with isolated mountain showers tonight into early Friday.
  • Winds increase over the mountains and foothills of south- central Montana Friday into Sunday.

Discussion

... Next 7 Days..

Another morning of patchy fog is forecast across the CWA. The highest chance of seeing viability reductions wil be in low lying areas, river valleys, and locations that still remain moist after the early week precip...