West Middlesex Weather Forecast

    • 21
    • 51

    Rain

    • 18
    • 36

    Snow Likely

    • 23
    • 43

    Mostly Cloudy

    • 17
    • 33

    Mostly Cloudy

    • 24
    • 33

    Mostly Cloudy

    • 30
    • 42

    Mostly Cloudy

Today 18 Dec Mercer

Partly cloudy. Highs in the upper 40s. South Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 18 Dec Mercer

Rain. Snow likely after midnight. Little or no snow accumulation. Lows in the lower 20s. South Winds 15 to 20 Mph, becoming southwest after midnight. Gusts up to 35 Mph. Chance of precipitation near 100 percent.

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West Middlesex Temperature Statistics

December Temperature

New Castle, New Castle Municipal Airport (9.9 miles)

  • Lowest 5 December, 2025

    1 °F

  • Average December

    23.9 °F

  • Highest 10 December, 2025

    37.9 °F

Climate (2020–Present)

New Castle, New Castle Municipal Airport (9.9 miles)

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  • Average Low 2020–2025

    41.8 °F

  • Average 2020–2025

    51.3 °F

  • Average High 2020–2025

    61 °F
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