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First Lake, MT Weather Forecast

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First Lake, MT Weather Forecast

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First Lake MT weather - Clear - 54°F
Clear
54°F
Updated 11:16 pm
Feels Like 52°F
Humidity 82%
Wind E 8 mph
Barometer  30.04 in
Dew Point 49°F
First Lake MT weather - Clear - 12°C
Clear
12°C
Updated 11:16 pm
Feels Like 11°C
Humidity 82%
Wind E 13 km/h
Barometer  101.7 kPa
Dew Point 9°C
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First Lake Weather Forecast

TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT LABOR DAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY
First Lake, MT Weather - Tonight Chance Of T-Storm First Lake, MT Weather - Saturday Chance Of T-Storm First Lake, MT Weather - Saturday Night Chance Of T-Storm First Lake, MT Weather - Sunday Chance Of T-Storm First Lake, MT Weather - Sunday Night Chance Of T-Storm First Lake, MT Weather - Labor Day Chance Of T-Storm First Lake, MT Weather - Monday Night Chance Of Rain First Lake, MT Weather - Tuesday Chance Of Rain First Lake, MT Weather - Tuesday Night Mostly Clear First Lake, MT Weather - Wednesday Partly Cloudy First Lake, MT Weather - Wednesday Night Partly Cloudy First Lake, MT Weather - Thursday Partly Cloudy
Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of Rain Chance of Rain Mostly Clear Partly Cloudy Partly Cloudy Partly Cloudy
Lo: 45°FLo: 7°C Hi: 70°FHi: 21°C
 Lo: 40°FLo: 4°C Hi: 70°FHi: 21°C
 Lo: 40°FLo: 4°C Hi: 56°FHi: 13°C
 Lo: 36°FLo: 2°C Hi: 65°FHi: 18°C
 Lo: 36°FLo: 2°C Hi: 70°FHi: 21°C
 Lo: 45°FLo: 7°C Hi: 75°FHi: 24°C
POP: 90% POP: 70% POP: 50% POP: 50% POP: 90% POP: 100% POP: 70% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 PM MDT Fri Sep 04 2026 First Lake, MT Weather - WeatherWorld.com

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Issued: 1254 PM MDT Fri Sep 4 2026

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KEY MESSAGES:
  • Some stronger showers and storms possible Saturday especially during the afternoon.
  • Widespread showers increasing Sunday into Monday with seasonably cool temperatures persisting into early next week.
  • Gradual drying trend develops mid-week alongside morning valley fog.

A broad trough of low pressure over the Pacific Northwest will maintain unseasonably cool conditions across western Montana and north-central Idaho, with valley high temperatures remaining 5 to 10 degrees ...