Marathon Weather Forecast

    • 58
    • 86

    Rain Showers Likely

    • 52
    • 74

    Partly Sunny

    • 62
    • 82

    Rain Showers Likely

    • 55
    • 78

    Slight Chance Thunderstorms

    • 53
    • 77

    Partly Sunny

    • 59
    • 81

    Chance Rain Showers

Today 17 Jul Cortland

Showers likely. A slight chance of Thunderstorms in the Morning, then a chance of Thunderstorms in the afternoon. Humid with Highs in the mid 80s. Southwest Winds 10 to 15 Mph. Gusts up to 30 Mph in the afternoon. Chance of rain 70 percent.

Tonight 17 Jul Cortland

Showers likely with a chance of Thunderstorms. Lows in the upper 60s. South Winds 5 to 10 Mph. Chance of rain 70 percent.

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Marathon Temperature Statistics

July Temperature

Cortland County-Chase Field (13.7 miles)

  • Lowest 4 July, 2025

    50 °F

  • Average July

    71.1 °F

  • Highest 7 July, 2025

    87.8 °F

Climate (2020–Present)

Cortland County-Chase Field (13.7 miles)

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  • Average Low 2020–2025

    38.1 °F

  • Average 2020–2025

    47.6 °F

  • Average High 2020–2025

    56.7 °F
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