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Lewis and Clark County, MT Weather Forecast

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Lewis and Clark County, MT Weather Forecast

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Lewis and Clark County MT weather - Clear - 73°F
Clear
73°F
Updated 12:27 am
Feels Like 50°F
Humidity 31%
Wind SW 5 mph
Barometer  29.99 in
Dew Point 41°F
Lewis and Clark County MT weather - Clear - 23°C
Clear
23°C
Updated 12:27 am
Feels Like 10°C
Humidity 31%
Wind SW 8 km/h
Barometer  101.6 kPa
Dew Point 5°C
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Lewis and Clark County Weather Forecast

REST OF TONIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT
Lewis and Clark County, MT Weather - Rest Of Tonight Clearing Lewis and Clark County, MT Weather - Friday Smoke Lewis and Clark County, MT Weather - Friday Night Smoke Lewis and Clark County, MT Weather - Saturday Chance Of T-Storm Lewis and Clark County, MT Weather - Saturday Night Chance Of T-Storm Lewis and Clark County, MT Weather - Sunday Chance Of Showers Lewis and Clark County, MT Weather - Sunday Night Partly Cloudy Lewis and Clark County, MT Weather - Monday Mostly Clear Lewis and Clark County, MT Weather - Tuesday Mostly Clear Lewis and Clark County, MT Weather - Tuesday Night Chance Of Showers Lewis and Clark County, MT Weather - Wednesday Rain Showers Lewis and Clark County, MT Weather - Wednesday Night Chance Of Showers
Clearing Smoke Smoke Chance of T-Storm Chance of T-Storm Chance of Showers Partly Cloudy Mostly Clear Mostly Clear Chance of Showers Rain Showers Chance of Showers
Lo: 55°FLo: 13°C Hi: 81°FHi: 27°C
 Lo: 55°FLo: 13°C Hi: 75°FHi: 24°C
 Lo: 49°FLo: 9°C Hi: 65°FHi: 18°C
 Lo: 45°FLo: 7°C Hi: 79°FHi: 26°C
Lo: 49°FLo: 9°C		 Hi: 79°FHi: 26°C
Lo: 49°FLo: 9°C		 Lo: 51°FLo: 11°C Hi: 71°FHi: 22°C
 Lo: 49°FLo: 9°C
POP: 60% POP: 70% POP: 50% POP: 20% POP: 20% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 952 PM MDT Thu Aug 27 2026 Lewis and Clark County, MT Weather - WeatherWorld.com

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Lewis and Clark County Forecast Discussion

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Issued: 1218 AM MDT Fri Aug 28 2026

Key Messages

  • Daily chances for showers and thunderstorms through the weekend, with the potential for some minor mountain snow on Sunday.
  • Breezy and gusty winds on Sunday, especially along the Rocky Mountain Front.
  • Well below normal temperatures by Sunday.

Discussion

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Closed upper level low over Gulf of Alaska and associated upper level trough over the Eastern Pacific will dig south to over the Pacific Northwest by Saturday morning before lifting and pivoting east northeast over the Northern Rocki...