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Harpers Lake, MT Weather Forecast

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Harpers Lake, MT Weather Forecast

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Harpers Lake MT weather - Clear - 60°F
Clear
60°F
Updated 1:26 am
Feels Like 61°F
Humidity 57%
Wind N 0 mph
Barometer  30.05 in
Dew Point 45°F
Harpers Lake MT weather - Clear - 16°C
Clear
16°C
Updated 1:26 am
Feels Like 16°C
Humidity 57%
Wind N 0 km/h
Barometer  101.7 kPa
Dew Point 7°C
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Harpers Lake Weather Forecast

TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY
Harpers Lake, MT Weather - Tonight Mostly Clear Harpers Lake, MT Weather - Wednesday Mostly Sunny Harpers Lake, MT Weather - Wednesday Night Partly Cloudy Harpers Lake, MT Weather - Thursday Mostly Sunny Harpers Lake, MT Weather - Thursday Night Mostly Clear Harpers Lake, MT Weather - Friday Partly Cloudy Harpers Lake, MT Weather - Friday Night Chance Of Rain Harpers Lake, MT Weather - Saturday Chance Of T-Storm Harpers Lake, MT Weather - Saturday Night Chance Of T-Storm Harpers Lake, MT Weather - Sunday Mostly Sunny Harpers Lake, MT Weather - Sunday Night Mostly Clear Harpers Lake, MT Weather - Monday Mostly Sunny
Mostly Clear Mostly Sunny Partly Cloudy Mostly Sunny Mostly Clear Partly Cloudy Chance of Rain Chance of T-Storm Chance of T-Storm Mostly Sunny Mostly Clear Mostly Sunny
Lo: 46°FLo: 8°C Hi: 80°FHi: 27°C
 Lo: 50°FLo: 10°C Hi: 85°FHi: 29°C
 Lo: 55°FLo: 13°C Hi: 86°FHi: 30°C
 Lo: 56°FLo: 13°C Hi: 80°FHi: 27°C
 Lo: 50°FLo: 10°C Hi: 76°FHi: 24°C
 Lo: 46°FLo: 8°C Hi: 80°FHi: 27°C
POP: 20% POP: 20% POP: 30%
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 PM MDT Tue Aug 18 2026 Harpers Lake, MT Weather - WeatherWorld.com

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Harpers Lake Forecast Discussion

Issued: 1238 PM MDT Tue Aug 18 2026

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KEY MESSAGES:
  • Shower and thunderstorm activity will continue this afternoon.
  • Ridge of high pressure Wednesday through Friday causing warming and drying.
  • Increased atmospheric moisture leading to a return to active weather Friday onward.

A disturbance moving through the Northern Rockies will interact with a drier air mass. Thunderstorms will not be widespread but areas that may see isolated storms will be along the Continental Divide, especially Silver Bo...