Walnut Weather Forecast

    • 67
    • 87

    Rain Showers Likely

    • 71
    • 88

    Partly Sunny

    • 67
    • 93

    Rain Showers Likely

    • 62
    • 84

    Chance Rain Showers

    • 62
    • 82

    Slight Chance Thunderstorms

    • 63
    • 85

    Mostly Sunny

Today 6 Sep Pottawattamie

Partly sunny. A slight chance of Showers and Thunderstorms in the Morning, then a chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the upper 80s. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 6 Sep Pottawattamie

Mostly cloudy. A chance of Showers and Thunderstorms, mainly in the evening. Humid with Lows in the upper 60s. Southeast Winds 10 to 15 Mph. Chance of rain 50 percent.

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Walnut Temperature Statistics

September Temperature

Harlan, Harlan Municipal Airport (9.3 miles)

  • Lowest 2 September, 2026

    66.2 °F

  • Average September

    80.3 °F

  • Highest 2 September, 2026

    95 °F

Climate (2021–2026)

Harlan, Harlan Municipal Airport (9.3 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    61.9 °F
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