Sigourney Weather Forecast

    • 65
    • 80

    Chance Thunderstorms

    • 60
    • 81

    Partly Sunny

    • 63
    • 82

    Slight Chance Thunderstorms

    • 64
    • 82

    Chance Thunderstorms

    • 61
    • 80

    Mostly Sunny

    • 62
    • 78

    Mostly Cloudy

Today 18 Aug Keokuk

Partly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the upper 70s. West Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 18 Aug Keokuk

Partly cloudy in the Evening, then becoming mostly cloudy. A chance of Showers and Thunderstorms. Humid with Lows in the mid 60s. Northwest Winds around 5 Mph. Chance of rain 40 percent.

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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

    76.2 °F

  • Highest 11 August, 2026

    91.9 °F

Climate (2021–2026)

Oskaloosa, Oskaloosa Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    65.3 °F
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