Newcastle Weather Forecast

    • 19
    • 36

    Chance Snow

    • 20
    • 37

    Slight Chance Snow

    • 26
    • 42

    Mostly Cloudy

    • 25
    • 48

    Chance Rain/Snow

    • 27
    • 40

    Chance Rain/Snow

    • 17
    • 33

    Chance Snow

Today 6 Dec Newcastle

Mostly cloudy. Highs in the upper 30s. Northwest Winds 5 to 10 Mph, increasing to 15 to 20 Mph this afternoon. Gusts up to 30 Mph.

Tonight 6 Dec Newcastle

Partly cloudy in the Evening, then mostly cloudy with a chance of snow after midnight. Little or no snow accumulation. Lows 15 to 20. Northwest Winds 10 to 15 Mph, becoming north around 5 Mph after midnight. Chance of snow 30 percent.

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Newcastle Temperature Statistics

December Temperature

Mondell Field (5.6 miles)

  • Lowest 1 December, 2025

    -0.4 °F

  • Average December

    22.8 °F

  • Highest 2 December, 2025

    33.8 °F

Climate (2020–Present)

Mondell Field (5.6 miles)

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  • Average Low 2020–2025

    35.7 °F

  • Average 2020–2025

    48.2 °F

  • Average High 2020–2025

    60.2 °F
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