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.

Fair

75°F

24°C

Humidity 36%
Wind Speed Calm
Barometer 29.99 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 20 Jun 3:15 pm CDT
Extended Forecast for

Marathon IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 79. Calm wind.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: A 50 percent chance of showers, mainly after 1am. Increasing clouds, with a low around 55. East wind 5 to 10 mph.

    Low: 55 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly before 9am. Mostly cloudy, with a high near 68. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 52. North northeast wind 5 to 10 mph.

    Low: 52 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 77. North northeast wind around 5 mph becoming east in the afternoon.

    High: 77 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54. South southeast wind around 5 mph.

    Low: 54 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 54.

    Low: 54 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 79. Calm wind.
Tonight
A 50 percent chance of showers, mainly after 1am. Increasing clouds, with a low around 55. East wind 5 to 10 mph.
Sunday
Showers likely, mainly before 9am. Mostly cloudy, with a high near 68. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Mostly cloudy, with a low around 52. North northeast wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 77. North northeast wind around 5 mph becoming east in the afternoon.
Monday Night
Partly cloudy, with a low around 54. South southeast wind around 5 mph.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 75.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
Sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marathon IA
 42.85°N 94.97°W (Elev. 1375 ft)
Last Update:
2:13 pm CDT Jun 20, 2026
Forecast Valid:
3pm CDT Jun 20, 2026-6pm CDT Jun 26, 2026
 
Forecast Discussion
 
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Additional Resources

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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