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.

Partly Cloudy

55°F

13°C

Humidity 24%
Wind Speed W 17 G 29 mph
Barometer 29.87 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 5 May 4:55 pm CDT
Extended Forecast for

Marathon IA

Frost Advisory May 6, 01:00am until May 6, 07:00am
Click here for hazard details and duration
Frost Advisory

  • Tonight

    Tonight: Widespread frost after 4am. Otherwise, mostly cloudy, with a low around 32. North wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 32 °F

    Mostly Cloudy
    then Frost

  • Wednesday

    Wednesday: Widespread frost before 8am. Otherwise, mostly sunny, with a high near 54. Northwest wind 5 to 10 mph.

    High: 54 °F

    Frost then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 35. Northwest wind 5 to 10 mph becoming southwest after midnight.

    Low: 35 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 68. Southwest wind 5 to 10 mph.

    High: 68 °F

    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 43. West wind 5 to 10 mph becoming south after midnight.

    Low: 43 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly sunny, with a high near 70. Southwest wind 5 to 15 mph becoming north northwest in the morning. Winds could gust as high as 20 mph.

    High: 70 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Chance
    Showers

Detailed Forecast

Tonight
Widespread frost after 4am. Otherwise, mostly cloudy, with a low around 32. North wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday
Widespread frost before 8am. Otherwise, mostly sunny, with a high near 54. Northwest wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 35. Northwest wind 5 to 10 mph becoming southwest after midnight.
Thursday
Sunny, with a high near 68. Southwest wind 5 to 10 mph.
Thursday Night
Increasing clouds, with a low around 43. West wind 5 to 10 mph becoming south after midnight.
Friday
Mostly sunny, with a high near 70. Southwest wind 5 to 15 mph becoming north northwest in the morning. Winds could gust as high as 20 mph.
Friday Night
Partly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 75.
Saturday Night
A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 43.
Sunday
Mostly sunny, with a high near 66.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 46.
Tuesday
Mostly sunny, with a high near 81.
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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:
4:28 pm CDT May 5, 2026
Forecast Valid:
5pm CDT May 5, 2026-6pm CDT May 12, 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