Lancaster Weather Forecast

    • 71
    • 99

    Slight Chance Thunderstorms

    • 69
    • 98

    Hot

    • 66
    • 96

    Chance Thunderstorms

    • 63
    • 88

    Rain Showers Likely

    • 60
    • 84

    Chance Rain Showers

    • 59
    • 81

    Partly Sunny

Today 19 Sep Smith

Sunny. Patchy fog this morning. A slight chance of Showers and Thunderstorms this afternoon. Hot with Highs in the upper 90s. Light and variable Winds. Chance of rain 20 percent. Heat index Values up to 106.

Tonight 19 Sep Smith

Partly cloudy in the Evening, then becoming mostly clear. Lows in the lower 70s. Light and variable Winds, becoming south around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lancaster Temperature Statistics

September Temperature

Sparta Upper Cumberland Regional Airport (18.6 miles)

  • Lowest 15 September, 2026

    64.4 °F

  • Average September

    79 °F

  • Highest 3 September, 2026

    98.6 °F

Climate (2021–2026)

Sparta Upper Cumberland Regional Airport (18.6 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    59.8 °F

  • Average High 2021–2026

    70.6 °F
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