Frenchman Island Weather Forecast

    • 66
    • 78

    Rain Showers

    • 57
    • 77

    Rain Showers Likely

    • 50
    • 64

    Mostly Sunny

    • 61
    • 71

    Chance Rain Showers

    • 63
    • 76

    Rain Showers Likely

    • 58
    • 76

    Rain Showers Likely

Today 12 Sep Oswego

Partly sunny. Highs Ranging from the mid 70s on the tug hill to the upper 70s across the lower Elevations. South Winds 10 Mph or less.

Tonight 12 Sep Oswego

A chance of Showers and Thunderstorms Early, then Showers with a chance of Thunderstorms through the early overnight. Showers likely late. Warm with Lows in the mid 60s. South Winds 5 to 10 Mph. Chance of rain 80 percent.

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  • Temperature Real-Time

Frenchman Island Temperature Statistics

September Temperature

Syracuse, Syracuse Hancock International Airport (7.5 miles)

  • Lowest 7 September, 2026

    53.7 °F

  • Average September

    70.8 °F

  • Highest 2 September, 2026

    85.6 °F

Climate (2021–2026)

Syracuse, Syracuse Hancock International Airport (7.5 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    60.6 °F
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