New Milltown Weather Forecast

    • 31
    • 38

    Increasing Clouds

    • 21
    • 43

    Becoming Sunny

    • 29
    • 38

    Chance Rain/Snow

    • 33
    • 47

    Slight Chance Rain/Snow

    • 31
    • 43

    Chance Rain Showers

    • 39
    • 44

    Chance Rain Showers

    • 36
    • 54

    Mostly Cloudy

Today 20 Dec Lancaster

Mostly sunny. Much cooler with Highs in the upper 30s. South Winds 5 to 10 Mph.

Tonight 20 Dec Lancaster

Mostly clear this Evening, then becoming partly cloudy. Not as cool with Lows in the lower 30s. South Winds 10 to 15 Mph, becoming southwest after midnight.

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New Milltown Temperature Statistics

December Temperature

Chester County Airport (10.6 miles)

  • Lowest 16 December, 2025

    8.6 °F

  • Average December

    28.4 °F

  • Highest 1 December, 2025

    41 °F

Climate (2020–Present)

Chester County Airport (10.6 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    63 °F
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