Marathon Weather Forecast

    • 68
    • 91

    Increasing Clouds

    • 65
    • 82

    Chance Thunderstorms

    • 67
    • 84

    Slight Chance Thunderstorms

    • 69
    • 86

    Mostly Sunny

    • 72
    • 91

    Slight Chance Thunderstorms

    • 67
    • 91

    Slight Chance Thunderstorms

Today 23 Jul Buena Vista

Sunny. A slight chance of Thunderstorms this afternoon. Some Thunderstorms may be severe. Highs in the lower 90s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of precipitation 20 percent. Heat index Values up to 107 this afternoon.

Tonight 23 Jul Buena Vista

A chance of Thunderstorms. Showers likely. Locally heavy rainfall possible in the evening. Humid with Lows in the upper 60s. Southwest Winds 10 to 15 Mph. Chance of rain 70 percent. Heat index Values up to 106 early in the evening.

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Marathon Temperature Statistics

July Temperature

Storm Lake (21.7 miles)

  • Lowest 13 July, 2025

    57.2 °F
  • Average July

    73.9 °F
  • Highest 3 July, 2025

    87.8 °F

Climate (2020–Present)

Storm Lake (21.7 miles)

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  • Average Low 2020–2025

    38.6 °F
  • Average 2020–2025

    48.4 °F
  • Average High 2020–2025

    58.5 °F
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