Lancaster Weather Forecast

    • 36
    • 64

    Increasing Clouds

    • 31
    • 53

    Increasing Clouds

    • 46
    • 59

    Chance Rain Showers

    • 51
    • 63

    Chance Rain Showers

    • 54
    • 67

    Mostly Cloudy

    • 55
    • 71

    Partly Sunny

    • 54
    • 70

    Mostly Cloudy

Today 20 Dec Smith

Sunny. Not as cool with Highs in the lower 60s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 20 Dec Smith

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 30s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming north after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lancaster Temperature Statistics

December Temperature

Sparta Upper Cumberland Regional Airport (18.6 miles)

  • Lowest 15 December, 2025

    10.4 °F

  • Average December

    37.1 °F

  • Highest 18 December, 2025

    60.8 °F

Climate (2020–Present)

Sparta Upper Cumberland Regional Airport (18.6 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    59.3 °F

  • Average High 2020–2025

    70 °F
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