Frenchman Island Weather Forecast

    • 59
    • 79

    Rain Showers

    • 56
    • 70

    Mostly Sunny

    • 63
    • 77

    Partly Sunny

    • 62
    • 78

    Rain Showers

    • 57
    • 73

    Rain Showers Likely

    • 58
    • 72

    Mostly Sunny

Today 18 Jul Oswego

Partly sunny with a chance of Showers Early, then Showers likely with a chance of Thunderstorms late this morning. Showers with Thunderstorms likely this afternoon. Areas of smoke through early afternoon. Some Thunderstorms may produce gusty Winds and heavy rainfall this afternoon. Locally heavy rainfall possible late. Highs Ranging from the mid 70s on the tug hill to around 80 across the lower Elevations. Southeast Winds 10 Mph or Less, becoming west 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

Tonight 18 Jul Oswego

Mostly cloudy. Showers and Thunderstorms likely in the evening. Some Thunderstorms may produce gusty Winds and heavy rainfall in the evening. Muggy with Lows Ranging from the mid 50s across the tug hill to the lower 60s along the lake Ontario shore. West Winds 10 to 15 Mph with Gusts up to 30 Mph, becoming northwest 5 to 10 Mph. Chance of rain 70 percent.

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Frenchman Island Temperature Statistics

July Temperature

Syracuse, Syracuse Hancock International Airport (7.5 miles)

  • Lowest 12 July, 2026

    57.7 °F
  • Average July

    77.5 °F
  • Highest 14 July, 2026

    97 °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

    51.6 °F
  • Average High 2021–2026

    60.6 °F
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