New Castle Weather Forecast

    • 62
    • 89

    Chance Thunderstorms

    • 57
    • 80

    Mostly Sunny

    • 61
    • 82

    Partly Sunny

    • 67
    • 86

    Partly Sunny

    • 68
    • 91

    Chance Rain Showers

    • 59
    • 83

    Slight Chance Thunderstorms

Today 5 Sep Henry

Partly cloudy with a chance of Showers and Thunderstorms. Humid with Highs in the upper 80s. Northwest Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 5 Sep Henry

Mostly clear. Cooler with Lows in the lower 60s. Northeast Winds 5 to 10 Mph. Gusts up to 20 Mph through the late overnight.

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New Castle Temperature Statistics

September Temperature

Anderson Municipal Airport (17.4 miles)

  • Lowest 1 September, 2026

    72.5 °F

  • Average September

    81.1 °F

  • Highest 1 September, 2026

    94.3 °F

Climate (2021–2026)

Anderson Municipal Airport (17.4 miles)

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  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    51.6 °F

  • Average High 2021–2026

    62.3 °F
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