Marathon Weather Forecast

    • 49
    • 75

    Chance Thunderstorms

    • 52
    • 69

    Chance Thunderstorms

    • 50
    • 70

    Chance Rain Showers

    • 56
    • 77

    Partly Sunny

    • 59
    • 81

    Rain Showers Likely

    • 53
    • 78

    Chance Rain Showers

    • 51
    • 74

    Mostly Sunny

Today 23 Aug Cortland

Partly sunny with a chance of Showers and Thunderstorms. Highs in the lower 70s. West Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 40 percent.

Tonight 23 Aug Cortland

Partly cloudy. A chance of Showers and Thunderstorms this evening. Lows around 50. Southwest Winds 5 to 10 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marathon Temperature Statistics

August Temperature

Cortland County-Chase Field (13.7 miles)

  • Lowest 21 August, 2026

    48.2 °F

  • Average August

    67.2 °F

  • Highest 6 August, 2026

    86 °F

Climate (2021–2026)

Cortland County-Chase Field (13.7 miles)

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  • Average Low 2021–2026

    37.7 °F

  • Average 2021–2026

    47.2 °F

  • Average High 2021–2026

    56.5 °F
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