Sigourney Weather Forecast

    • 71
    • 92

    Slight Chance Thunderstorms

    • 69
    • 88

    Rain Showers

    • 66
    • 83

    Rain Showers

    • 67
    • 81

    Rain Showers Likely

    • 69
    • 87

    Chance Thunderstorms

    • 64
    • 83

    Mostly Cloudy

Today 11 Aug Keokuk

Mostly sunny. A slight chance of Showers and Thunderstorms late this morning. Hot with Highs in the lower 90s. West Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 102 this afternoon.

Tonight 11 Aug Keokuk

Mostly clear in the Evening, then mostly cloudy with a slight chance of Showers and Thunderstorms after midnight. Humid with Lows around 70. Northeast Winds 5 to 10 Mph, becoming east after midnight. Chance of rain 20 percent. Heat index Values up to 100 early in the evening.

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Sigourney Temperature Statistics

August Temperature

Oskaloosa, Oskaloosa Municipal Airport (16.2 miles)

  • Lowest 3 August, 2026

    61.7 °F

  • Average August

    74.4 °F

  • Highest 9 August, 2026

    88.7 °F

Climate (2021–2026)

Oskaloosa, Oskaloosa Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    65.2 °F
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