Lancaster Weather Forecast

    • 52
    • 80

    Mostly Sunny

    • 55
    • 84

    Mostly Sunny

    • 56
    • 87

    Mostly Sunny

    • 56
    • 89

    Sunny

    • 57
    • 89

    Sunny

    • 57
    • 90

    Mostly Sunny

Today 8 Sep Smith

Sunny. Highs in the upper 70s. Northeast Winds around 5 Mph.

Tonight 8 Sep Smith

Clear. Lows in the upper 40s. Northeast Winds around 5 Mph.

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  • Temperature Real-Time

Lancaster Temperature Statistics

September Temperature

Sparta Upper Cumberland Regional Airport (18.6 miles)

  • Lowest 1 September, 2025

    53.6 °F

  • Average September

    69 °F

  • Highest 5 September, 2025

    87.8 °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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