National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

EUREKA (EURM8)

Lat: 48.89781°NLon: 115.05836°WElev: 2632.0ft.

NA

64°F

18°C

Humidity 44%
Wind Speed NNW 0 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 02 Oct 04:15 PM MDT
Extended Forecast for

Eureka MT

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 67. Light northwest wind.

    High: 67 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: A 20 percent chance of rain after midnight. Partly cloudy, with a low around 38. Light and variable wind.

    Low: 38 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Saturday

    Saturday: A 50 percent chance of rain. Partly sunny, with a high near 63. Calm wind.

    High: 63 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Rain likely. Mostly cloudy, with a low around 32. Light and variable wind becoming north around 5 mph after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 32 °F

    Rain Likely

  • Sunday

    Sunday: Widespread frost, mainly before 9am. Otherwise, mostly sunny, with a high near 58.

    High: 58 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Widespread frost after 1am. Otherwise, mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear
    then Frost

  • Monday

    Monday: Widespread frost, mainly before 10am. Otherwise, sunny, with a high near 63.

    High: 63 °F

    Frost then
    Sunny

  • Monday Night

    Monday Night: Widespread frost, mainly after 2am. Otherwise, clear, with a low around 31.

    Low: 31 °F

    Clear then
    Frost

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 38. Calm wind.
Friday
Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 67. Light northwest wind.
Friday Night
A 20 percent chance of rain after midnight. Partly cloudy, with a low around 38. Light and variable wind.
Saturday
A 50 percent chance of rain. Partly sunny, with a high near 63. Calm wind.
Saturday Night
Rain likely. Mostly cloudy, with a low around 32. Light and variable wind becoming north around 5 mph after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Widespread frost, mainly before 9am. Otherwise, mostly sunny, with a high near 58.
Sunday Night
Widespread frost after 1am. Otherwise, mostly clear, with a low around 29.
Monday
Widespread frost, mainly before 10am. Otherwise, sunny, with a high near 63.
Monday Night
Widespread frost, mainly after 2am. Otherwise, clear, with a low around 31.
Tuesday
Widespread frost before 10am. Otherwise, sunny, with a high near 67.
Tuesday Night
Widespread frost. Otherwise, clear, with a low around 33.
Wednesday
Widespread frost. Otherwise, sunny, with a high near 67.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 35.
Thursday
A chance of rain. Partly sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
Eureka MT
 48.88°N 115.06°W (Elev. 2818 ft)
Last Update:
2:31 pm MDT Oct 2, 2025
Forecast Valid:
5pm MDT Oct 2, 2025-6pm MDT Oct 9, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation