Dorchester Weather Forecast

    • 56
    • 80

    Mostly Sunny

    • 63
    • 81

    Chance Thunderstorms

    • 53
    • 79

    Partly Sunny

    • 59
    • 75

    Rain Showers

    • 57
    • 81

    Rain Showers Likely

    • 52
    • 73

    Mostly Cloudy

Today 10 Sep Allamakee

Patchy fog this morning. Mostly sunny. Highs in the upper 70s. Light and variable Winds, becoming northwest around 5 Mph this afternoon.

Tonight 10 Sep Allamakee

Clear. Lows in the mid 50s. Light Winds.

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Dorchester Temperature Statistics

September Temperature

Decorah (16.8 miles)

  • Lowest 7 September, 2026

    62.6 °F

  • Average September

    74 °F

  • Highest 4 September, 2026

    87.8 °F

Climate (2021–2026)

Decorah (16.8 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    47.8 °F

  • Average High 2021–2026

    56.4 °F
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