New Castle Weather Forecast

    • 68
    • 86

    Thunderstorms

    • 63
    • 84

    Rain Showers

    • 57
    • 79

    Partly Sunny

    • 64
    • 79

    Rain Showers

    • 62
    • 80

    Chance Thunderstorms

    • 60
    • 77

    Chance Rain Showers

Today 16 Sep Lawrence

Partly cloudy. Isolated Showers in the Morning, then scattered Showers and Thunderstorms in the afternoon. Warm with Highs in the mid 80s. South Winds around 5 Mph, becoming west in the afternoon. Chance of rain 40 percent.

Tonight 16 Sep Lawrence

Mostly cloudy with scattered Showers. Scattered Thunderstorms, mainly in the evening. Warm with Lows in the upper 60s. Northeast Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 50 percent.

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New Castle Temperature Statistics

September Temperature

New Castle, New Castle Municipal Airport (3.7 miles)

  • Lowest 6 September, 2026

    54 °F

  • Average September

    71.3 °F

  • Highest 2 September, 2026

    91.9 °F

Climate (2021–2026)

New Castle, New Castle Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    41.7 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    61.1 °F
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