Delaware Canal - Summit Harbor Weather Forecast

    • 9
    • 40

    Decreasing Clouds

    • 15
    • 21

    Snow

    • 23
    • 30

    Wintry Mix

    • 7
    • 29

    Chance Snow

    • 8
    • 21

    Mostly Sunny

    • 7
    • 22

    Mostly Cloudy

    • 6
    • 20

    Slight Chance Snow

Today 23 Jan New Castle

Mostly cloudy. Cooler with Highs around 40. Temperature falling into the mid 30s late. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 23 Jan New Castle

Mostly cloudy this Evening, then clearing. Much Colder with Lows around 9 above. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Wind chill Values as low as 6 below after midnight.

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Delaware Canal - Summit Harbor Temperature Statistics

January Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 21 January, 2026

    10 °F

  • Average January

    34.8 °F

  • Highest 7 January, 2026

    60.1 °F

Climate (2021–Present)

Wilmington, New Castle County Airport (10.6 miles)

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  • Average Low 2021–2026

    48 °F

  • Average 2021–2026

    57.2 °F

  • Average High 2021–2026

    66.5 °F
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