Guernsey Weather Forecast

    • 67
    • 92

    Increasing Clouds

    • 64
    • 85

    Chance Rain Showers

    • 67
    • 85

    Partly Sunny

    • 71
    • 94

    Partly Sunny

    • 64
    • 88

    Chance Rain Showers

    • 61
    • 83

    Slight Chance Rain Showers

Today 5 Sep Poweshiek

Sunny with Highs in the lower 90s. Northeast Winds 5 to 10 Mph. Heat index Values up to 101.

Tonight 5 Sep Poweshiek

Partly cloudy. Humid with Lows in the upper 60s. East Winds 5 to 10 Mph.

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Guernsey Temperature Statistics

September Temperature

Oskaloosa, Oskaloosa Municipal Airport (29.8 miles)

  • Lowest 1 September, 2026

    71.6 °F

  • Average September

    83.1 °F

  • Highest 2 September, 2026

    96.1 °F

Climate (2021–2026)

Oskaloosa, Oskaloosa Municipal Airport (29.8 miles)

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    65.2 °F
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