Demster Weather Forecast

    • 49
    • 66

    Slight Chance Rain Showers

    • 60
    • 73

    Chance Rain Showers

    • 60
    • 75

    Chance Rain Showers

    • 58
    • 74

    Chance Rain Showers

    • 54
    • 72

    Chance Rain Showers

    • 54
    • 68

    Chance Rain Showers

Today 14 Sep Oswego

Partly sunny. A chance of Showers early. Highs Ranging from the lower 60s on the tug hill to the mid 60s across the lower Elevations. Northwest Winds 10 to 15 Mph, Diminishing to 5 to 10 Mph. Chance of rain 30 percent.

Tonight 14 Sep Oswego

Mainly clear. Lows Ranging from the mid 40s across the tug hill to the lower 50s along the lake Ontario shore. Light southeast Winds.

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Demster Temperature Statistics

September Temperature

Fulton, Oswego County Airport (10.6 miles)

  • Lowest 7 September, 2026

    48.9 °F

  • Average September

    67 °F

  • Highest 2 September, 2026

    82 °F

Climate (2021–2026)

Fulton, Oswego County Airport (10.6 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    49.4 °F

  • Average High 2021–2026

    58 °F
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