Green Castle Recreation Area Weather Forecast

    • 70
    • 96

    Mostly Sunny

    • 64
    • 85

    Mostly Sunny

    • 66
    • 87

    Mostly Sunny

    • 67
    • 88

    Chance Thunderstorms

    • 64
    • 79

    Chance Thunderstorms

    • 63
    • 81

    Mostly Sunny

Today 27 Jul Marshall

Sunny, hot. Near steady temperature in the mid 90s. Northwest Winds 5 to 10 Mph. Heat index Values up to 118.

Tonight 27 Jul Marshall

Partly cloudy. Patchy smoke. Humid with Lows around 70. Northwest Winds 5 to 10 Mph, becoming north after midnight. Heat index Values up to 116 early early.

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Green Castle Recreation Area Temperature Statistics

July Temperature

Marshalltown, Marshalltown Municipal Airport (12.4 miles)

  • Lowest 23 July, 2026

    54.6 °F

  • Average July

    75.4 °F

  • Highest 2 July, 2026

    91.7 °F

Climate (2021–2026)

Marshalltown, Marshalltown Municipal Airport (12.4 miles)

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  • Average Low 2021–2026

    39.7 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    61.4 °F
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