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St. Ignatius, MT Weather Forecast

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St. Ignatius, MT Weather Forecast

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St. Ignatius MT weather - Partly Cloudy - 38°F
Partly Cloudy
38°F
Updated 8:06 pm
Feels Like 26°F
Humidity 85%
Wind NNW 6 mph
Barometer  30.03 in
Dew Point 34°F
St. Ignatius MT weather - Partly Cloudy - 3°C
Partly Cloudy
3°C
Updated 8:06 pm
Feels Like -3°C
Humidity 85%
Wind NNW 10 km/h
Barometer  101.7 kPa
Dew Point 1°C
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St. Ignatius Weather Forecast

TONIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY
St. Ignatius, MT Weather - Tonight Patchy Fog St. Ignatius, MT Weather - Tuesday Patchy Fog St. Ignatius, MT Weather - Tuesday Night Patchy Fog St. Ignatius, MT Weather - Wednesday Patchy Fog St. Ignatius, MT Weather - Wednesday Night Patchy Fog St. Ignatius, MT Weather - Thursday Patchy Fog St. Ignatius, MT Weather - Thursday Night Mostly Clear St. Ignatius, MT Weather - Friday Mostly Sunny St. Ignatius, MT Weather - Friday Night Partly Cloudy St. Ignatius, MT Weather - Saturday Partly Cloudy St. Ignatius, MT Weather - Saturday Night Partly Cloudy St. Ignatius, MT Weather - Sunday Mostly Sunny
Patchy Fog Patchy Fog Patchy Fog Patchy Fog Patchy Fog Patchy Fog Mostly Clear Mostly Sunny Partly Cloudy Partly Cloudy Partly Cloudy Mostly Sunny
Lo: 25°FLo: -4°C Hi: 55°FHi: 13°C
 Lo: 26°FLo: -3°C Hi: 56°FHi: 13°C
 Lo: 26°FLo: -3°C Hi: 60°FHi: 16°C
 Lo: 30°FLo: -1°C Hi: 65°FHi: 18°C
 Lo: 36°FLo: 2°C Hi: 66°FHi: 19°C
 Lo: 35°FLo: 2°C Hi: 60°FHi: 16°C
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 PM MDT Mon Oct 12 2026 St. Ignatius, MT Weather - WeatherWorld.com

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St. Ignatius Forecast Discussion

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Issued: 1236 PM MDT Mon Oct 12 2026

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KEY MESSAGES:
  • Hard freeze coming for the mornings.
  • Valley fog and stratus will be common early this week.
  • A warming and drying trend this week.
  • Unsettled weather on the way for early next week.

Satellite imagery early this afternoon indicates a closed circulation of low pressure over eastern Oregon and southwestern Idaho. This system, responsible for sending Pacific moisture northwards into southwest Montana and north-central Idaho, will take a more southern route going into Tuesday....