Big Island Weather Forecast

    • 64
    • 89

    Mostly Sunny

    • 62
    • 90

    Sunny

    • 64
    • 91

    Mostly Sunny

    • 68
    • 93

    Mostly Sunny

    • 70
    • 94

    Mostly Sunny

    • 70
    • 93

    Chance Rain Showers

Today 15 Sep Chester

Partly sunny in the Morning, then clearing. Highs in the upper 80s. East Winds 5 to 10 Mph.

Tonight 15 Sep Chester

Partly cloudy. Lows around 70. East Winds around 5 Mph.

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Big Island Temperature Statistics

September Temperature

Lancaster County-mc Whirter Field (11.2 miles)

  • Lowest 9 September, 2026

    62.6 °F

  • Average September

    80.6 °F

  • Highest 2 September, 2026

    98.6 °F

Climate (2021–2026)

Lancaster County-mc Whirter Field (11.2 miles)

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  • Average Low 2021–2026

    52.1 °F

  • Average 2021–2026

    62.5 °F

  • Average High 2021–2026

    74 °F
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