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Stewart Lake, MT Weather Forecast

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Stewart Lake, MT Weather Forecast

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Stewart Lake MT weather - Mostly Clear - 57°F
Mostly Clear
57°F
Updated 3:58 am
Feels Like 48°F
Humidity 67%
Wind NNE 6 mph
Barometer  30.09 in
Dew Point 46°F
Stewart Lake MT weather - Mostly Clear - 14°C
Mostly Clear
14°C
Updated 3:58 am
Feels Like 9°C
Humidity 67%
Wind NNE 10 km/h
Barometer  101.9 kPa
Dew Point 8°C
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Stewart Lake Weather Forecast

TODAY TONIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT
Stewart Lake, MT Weather - Today Mostly Sunny Stewart Lake, MT Weather - Tonight Mostly Clear Stewart Lake, MT Weather - Thursday Mostly Sunny Stewart Lake, MT Weather - Thursday Night Mostly Clear Stewart Lake, MT Weather - Friday Partly Cloudy Stewart Lake, MT Weather - Friday Night Chance Of Rain Stewart Lake, MT Weather - Saturday Chance Of T-Storm Stewart Lake, MT Weather - Saturday Night Chance Of T-Storm Stewart Lake, MT Weather - Sunday Chance Of T-Storm Stewart Lake, MT Weather - Sunday Night Mostly Clear Stewart Lake, MT Weather - Monday Mostly Sunny Stewart Lake, MT Weather - Monday Night Partly Cloudy
Mostly Sunny Mostly Clear Mostly Sunny Mostly Clear Partly Cloudy Chance of Rain Chance of T-Storm Chance of T-Storm Chance of T-Storm Mostly Clear Mostly Sunny Partly Cloudy
Hi: 76°FHi: 24°C
 Lo: 46°FLo: 8°C Hi: 85°FHi: 29°C
 Lo: 50°FLo: 10°C Hi: 86°FHi: 30°C
 Lo: 55°FLo: 13°C Hi: 80°FHi: 27°C
 Lo: 46°FLo: 8°C Hi: 75°FHi: 24°C
 Lo: 45°FLo: 7°C Hi: 76°FHi: 24°C
 Lo: 46°FLo: 8°C
POP: 30% POP: 70% POP: 40% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 157 AM MDT Wed Aug 19 2026 Stewart Lake, MT Weather - WeatherWorld.com

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Stewart 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...