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Oly Lake, MT Weather Forecast

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Oly Lake, MT Weather Forecast

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Oly Lake MT weather - Clear - 44°F
Clear
44°F
Updated 1:58 am
Feels Like 26°F
Humidity 65%
Wind W 6 mph
Barometer  30.17 in
Dew Point 33°F
Oly Lake MT weather - Clear - 7°C
Clear
7°C
Updated 1:58 am
Feels Like -3°C
Humidity 65%
Wind W 10 km/h
Barometer  102.2 kPa
Dew Point 1°C
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Oly Lake Weather Forecast

TODAY TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT
Oly Lake, MT Weather - Today Sunny Oly Lake, MT Weather - Tonight Mostly Clear Oly Lake, MT Weather - Wednesday Mostly Sunny Oly Lake, MT Weather - Wednesday Night Mostly Cloudy Oly Lake, MT Weather - Thursday Chance Of T-Storm Oly Lake, MT Weather - Thursday Night Chance Of T-Storm Oly Lake, MT Weather - Friday Chance Of T-Storm Oly Lake, MT Weather - Friday Night Chance Of Showers Oly Lake, MT Weather - Saturday Chance Of Showers Oly Lake, MT Weather - Saturday Night Mostly Clear Oly Lake, MT Weather - Sunday Sunny Oly Lake, MT Weather - Sunday Night Mostly Clear
Sunny Mostly Clear Mostly Sunny Mostly Cloudy Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of Showers Chance of Showers Mostly Clear Sunny Mostly Clear
Hi: 65°FHi: 18°C
 Lo: 30°FLo: -1°C Hi: 71°FHi: 22°C
 Lo: 35°FLo: 2°C Hi: 71°FHi: 22°C
 Lo: 35°FLo: 2°C Hi: 61°FHi: 16°C
 Lo: 30°FLo: -1°C Hi: 61°FHi: 16°C
 Lo: 29°FLo: -2°C Hi: 69°FHi: 21°C
 Lo: 31°FLo: -1°C
POP: 70% POP: 70% POP: 70% POP: 40% POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 1238 AM MDT Tue Sep 15 2026 Oly Lake, MT Weather - WeatherWorld.com

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Oly Lake Forecast Discussion

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Issued: 1257 AM MDT Tue Sep 15 2026

Key Messages

  • Cooler than normal through Wednesday, then seasonable temperatures.
  • Increasing chances for showers and thunderstorms Thursday through Saturday. Locally heavy rain possible, especially east of Billings.

Discussion

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Through next Monday...

Satellite imagery shows the departing upper low over southern Manitoba and a flatter W-NW flow over the northern Rockies. There is an upstream shortwave along the BC coast that will be a player for us later this week. Winds are decreasing and will shif...