Marathon Lake Weather Forecast

    • 72
    • 93

    Rain Showers Likely

    • 72
    • 96

    Chance Thunderstorms

    • 71
    • 97

    Slight Chance Thunderstorms

    • 71
    • 93

    Slight Chance Thunderstorms

    • 71
    • 92

    Slight Chance Thunderstorms

    • 70
    • 93

    Partly Sunny

Today 5 Sep Smith

Mostly sunny. A chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. East Winds around 5 Mph. Chance of rain 30 percent.

Tonight 5 Sep Smith

Mostly clear. Patchy fog. Lows in the lower 70s. West Winds around 5 Mph late this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marathon Lake Temperature Statistics

September Temperature

Meridian, Key Field (36.7 miles)

  • Lowest 1 September, 2026

    72.6 °F

  • Average September

    85.9 °F

  • Highest 1 September, 2026

    99.6 °F

Climate (2021–2026)

Meridian, Key Field (36.7 miles)

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  • Average Low 2021–2026

    55.7 °F

  • Average 2021–2026

    66.5 °F

  • Average High 2021–2026

    78.8 °F
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