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Boulder Lake, MT Weather Forecast

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Boulder Lake, MT Weather Forecast

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Boulder Lake MT weather - Mostly Clear - 63°F
Mostly Clear
63°F
Updated 2:13 pm
Feels Like 55°F
Humidity 53%
Wind VRB 3 mph
Barometer  30.13 in
Dew Point 46°F
Boulder Lake MT weather - Mostly Clear - 17°C
Mostly Clear
17°C
Updated 2:13 pm
Feels Like 13°C
Humidity 53%
Wind VRB 5 km/h
Barometer  102 kPa
Dew Point 8°C
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Boulder Lake Weather Forecast

TONIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY
Boulder Lake, MT Weather - Tonight Patchy Fog Boulder Lake, MT Weather - Friday Mostly Sunny Boulder Lake, MT Weather - Friday Night Patchy Fog Boulder Lake, MT Weather - Saturday Mostly Sunny Boulder Lake, MT Weather - Saturday Night Mostly Clear Boulder Lake, MT Weather - Sunday Sunny Boulder Lake, MT Weather - Sunday Night Mostly Clear Boulder Lake, MT Weather - Monday Mostly Sunny Boulder Lake, MT Weather - Monday Night Mostly Clear Boulder Lake, MT Weather - Tuesday Mostly Sunny Boulder Lake, MT Weather - Tuesday Night Mostly Clear Boulder Lake, MT Weather - Wednesday Mostly Sunny
Patchy Fog Mostly Sunny Patchy Fog Mostly Sunny Mostly Clear Sunny Mostly Clear Mostly Sunny Mostly Clear Mostly Sunny Mostly Clear Mostly Sunny
Lo: 40°FLo: 4°C Hi: 66°FHi: 19°C
 Lo: 40°FLo: 4°C Hi: 66°FHi: 19°C
 Lo: 40°FLo: 4°C Hi: 75°FHi: 24°C
 Lo: 40°FLo: 4°C Hi: 75°FHi: 24°C
 Lo: 40°FLo: 4°C Hi: 70°FHi: 21°C
 Lo: 36°FLo: 2°C Hi: 70°FHi: 21°C
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 PM MDT Thu Oct 01 2026 Boulder Lake, MT Weather - WeatherWorld.com

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Boulder Lake Forecast Discussion

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Issued: 102 PM MDT Thu Oct 1 2026

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KEY MESSAGES:
  • Warming and drying trend Friday through Sunday; cool/cold valley lows with patchy frost.
  • Westerly winds increase Friday afternoon and Monday with passing disturbances.

Zonal flow aloft will yield to a building high-pressure ridge across the Northern Rockies Friday through Saturday. This will initiate a warming and drying trend, with daytime high temperatures rising roughly 10 to 15 degrees (or more) above seasonal averages this weekend. Strong nocturnal radiational cool...