Demster Weather Forecast

    • 49
    • 66

    Chance Rain Showers

    • 50
    • 70

    Mostly Sunny

    • 51
    • 70

    Partly Sunny

    • 53
    • 73

    Mostly Sunny

    • 57
    • 77

    Partly Sunny

    • 59
    • 80

    Slight Chance Rain Showers

Today 31 May Oswego

Partly sunny through early Afternoon, then mostly cloudy with a chance of Showers late. Highs Ranging from the lower 60s on the tug hill to the upper 60s across the lower Elevations. West Winds 5 to 10 Mph, increasing to 10 to 15 Mph. Chance of rain 30 percent.

Tonight 31 May Oswego

Mostly cloudy with a chance of Showers in the Evening, then partly cloudy overnight. Lows Ranging from the mid 40s across the tug hill to around 50 along the lake Ontario shore. West Winds 5 to 10 Mph, becoming light. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Demster Temperature Statistics

May Temperature

Fulton, Oswego County Airport (10.6 miles)

  • Lowest 12 May, 2026

    28.9 °F

  • Average May

    53.9 °F

  • Highest 18 May, 2026

    89.1 °F

Climate (2021–Present)

Fulton, Oswego County Airport (10.6 miles)

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  • Average Low 2021–2026

    40.8 °F

  • Average 2021–2026

    49.4 °F

  • Average High 2021–2026

    58 °F
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