Demster Weather Forecast

    • 45
    • 62

    Mostly Cloudy

    • 46
    • 65

    Partly Sunny

    • 47
    • 66

    Mostly Sunny

    • 47
    • 67

    Partly Sunny

    • 49
    • 67

    Partly Sunny

    • 49
    • 65

    Partly Sunny

Today 21 Sep Oswego

Partly sunny. Highs Ranging from the mid 50s on the tug hill to the lower 60s across the lower Elevations. North Winds 5 to 10 Mph, becoming northeast.

Tonight 21 Sep Oswego

Mostly cloudy. Lows Ranging from around 40 on the tug hill to the mid 40s across the lower Elevations. Northeast Winds 5 to 10 Mph, becoming light.

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Demster Temperature Statistics

September Temperature

Fulton, Oswego County Airport (10.6 miles)

  • Lowest 19 September, 2026

    41 °F

  • Average September

    65.4 °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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