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Eureka, MT Weather Forecast

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Eureka, MT Weather Forecast

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Eureka MT weather - Overcast - 48°F
Overcast
48°F
Updated 4:51 am
Feels Like 38°F
Humidity 92%
Wind N 0 mph
Barometer  30.08 in
Dew Point 46°F
Eureka MT weather - Overcast - 9°C
Overcast
9°C
Updated 4:51 am
Feels Like 3°C
Humidity 92%
Wind N 0 km/h
Barometer  101.8 kPa
Dew Point 8°C
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Eureka Weather Forecast

TODAY TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT
Eureka, MT Weather - Today Rain Eureka, MT Weather - Tonight Chance Of Rain Eureka, MT Weather - Wednesday Patchy Fog Eureka, MT Weather - Wednesday Night Clear Eureka, MT Weather - Thursday Mostly Sunny Eureka, MT Weather - Thursday Night Mostly Clear Eureka, MT Weather - Friday Mostly Sunny Eureka, MT Weather - Friday Night Mostly Clear Eureka, MT Weather - Saturday Partly Cloudy Eureka, MT Weather - Saturday Night Mostly Clear Eureka, MT Weather - Sunday Mostly Sunny Eureka, MT Weather - Sunday Night Mostly Clear
Rain Chance of Rain Patchy Fog Clear Mostly Sunny Mostly Clear Mostly Sunny Mostly Clear Partly Cloudy Mostly Clear Mostly Sunny Mostly Clear
Hi: 60°FHi: 16°C
 Lo: 40°FLo: 4°C Hi: 70°FHi: 21°C
 Lo: 40°FLo: 4°C Hi: 76°FHi: 24°C
 Lo: 46°FLo: 8°C Hi: 76°FHi: 24°C
 Lo: 46°FLo: 8°C Hi: 76°FHi: 24°C
 Lo: 46°FLo: 8°C Hi: 76°FHi: 24°C
 Lo: 46°FLo: 8°C
POP: 50% POP: 50%
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 AM MDT Tue Sep 15 2026 Eureka, MT Weather - WeatherWorld.com

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Issued: 241 AM MDT Tue Sep 15 2026

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KEY MESSAGES:
  • Chilly start this morning across southwest Montana and north central Idaho with patchy valley fog.
  • Warming and drying through mid week, then wetter Thursday into Friday.

Clear skies south of Highway 200 in western Montana and north-central Idaho allowed temperatures to drop near or below freezing early this morning, leading to patchy frost and valley fog that may expand through daybreak. North of Highway 200, cloud cover remains thicker, keeping temperatures slightly mi...