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

Hazardous Weather Conditions

Current conditions at

Storm Lake (KSLB)

Lat: 42.6°NLon: 95.23°WElev: 1489ft.

Fog/Mist

63°F

17°C

Humidity 100%
Wind Speed S 5 mph
Barometer 29.99 in
Dewpoint 63°F (17°C)
Visibility 2.50 mi
Last update 18 Sep 2:15 am CDT
Extended Forecast for

Marathon IA

  • Overnight

    Overnight: A 30 percent chance of showers. Mostly cloudy, with a low around 61. South wind around 5 mph.

    Low: 61 °F

    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 79. South wind 5 to 10 mph. Chance of precipitation is 40%.

    High: 79 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 75. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.

    High: 75 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 57. South wind around 5 mph. Chance of precipitation is 30%.

    Low: 57 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 4pm, then a slight chance of showers after 4pm. Partly sunny, with a high near 79. South wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers. Mostly sunny, with a high near 81.

    High: 81 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 59.

    Low: 59 °F

    Chance
    Showers

Detailed Forecast

Overnight
A 30 percent chance of showers. Mostly cloudy, with a low around 61. South wind around 5 mph.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 79. South wind 5 to 10 mph. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 75. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 57. South wind around 5 mph. Chance of precipitation is 30%.
Saturday
A slight chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 4pm, then a slight chance of showers after 4pm. Partly sunny, with a high near 79. South wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday Night
Mostly cloudy, with a low around 58.
Sunday
A 30 percent chance of showers. Mostly sunny, with a high near 81.
Sunday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 55.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 53.
Wednesday
Sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon IA
 42.85°N 94.97°W (Elev. 1375 ft)
Last Update:
12:18 am CDT Sep 18, 2025
Forecast Valid:
2am CDT Sep 18, 2025-6pm CDT Sep 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation