St Ignatius, MT Weather Forecast

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St Ignatius, MT Weather Forecast

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St Ignatius MT weather  - Fog - 31°F
Fog
31°F
Updated 1:39 am
Feels Like 39°F
Humidity 96%
Wind N 0 mph
Barometer  30.14 in
Dew Point 30°F
St Ignatius MT weather  - Fog - -1°C
Fog
-1°C
Updated 1:39 am
Feels Like 4°C
Humidity 96%
Wind N 0 km/h
Barometer  102.1 kPa
Dew Point -1°C

St Ignatius Weather Forecast

TODAY TONIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT
St Ignatius, MT Weather - Today Mostly Cloudy St Ignatius, MT Weather - Tonight Mostly Cloudy St Ignatius, MT Weather - Friday Mostly Cloudy St Ignatius, MT Weather - Friday Night Partly Cloudy St Ignatius, MT Weather - Saturday Chance Of Rain St Ignatius, MT Weather - Saturday Night Patchy Fog St Ignatius, MT Weather - Sunday Patchy Fog St Ignatius, MT Weather - Sunday Night Partly Cloudy St Ignatius, MT Weather - Monday Chance Of Rain St Ignatius, MT Weather - Monday Night Chance Of Rain St Ignatius, MT Weather - Tuesday Chance Of Rain St Ignatius, MT Weather - Tuesday Night Chance Of Rain
Mostly Cloudy Mostly Cloudy Mostly Cloudy Partly Cloudy Chance of Rain Patchy Fog Patchy Fog Partly Cloudy Chance of Rain Chance of Rain Chance of Rain Chance of Rain
Hi: 50°FHi: 10°C
Lo: 35°FLo: 2°C Hi: 46°FHi: 8°C
Lo: 30°FLo: -1°C Hi: 46°FHi: 8°C
Lo: 30°FLo: -1°C Hi: 46°FHi: 8°C
Lo: 30°FLo: -1°C Hi: 46°FHi: 8°C
Lo: 30°FLo: -1°C Hi: 40°FHi: 4°C
Lo: 26°FLo: -3°C
POP: 40% POP: 40% POP: 30% POP: 20% POP: 30%
POP = Probability of Precipitation.
Weather Outlook Updated: 102 AM MST Thu Nov 12 2026 St Ignatius, MT Weather - WeatherWorld.com

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Issued: 131 PM MST Wed Nov 11 2026

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KEY MESSAGES:
  • Through Friday Fog & Low Cloud Potential: Strong high pressure increasing likelihood of valley inversions.
  • Pattern Shift: A Pacific system will tap into atmospheric river moisture beginning Saturday, snow levels stay above 6000 feet and precipitation amounts light.
  • Further cooling early to mid next week with potential for snow levels to lower further.

High pressure was sufficient enough to produce morning valley fog but low level mixing has broken inversions and dissipa...