Birch Lake Park Weather Forecast

    • 61
    • 85

    Mostly Cloudy

    • 60
    • 79

    Chance Thunderstorms

    • 61
    • 79

    Chance Rain Showers

    • 61
    • 79

    Chance Thunderstorms

    • 58
    • 79

    Chance Rain Showers

    • 55
    • 75

    Slight Chance Rain Showers

Today 18 Sep Iowa

Partly sunny. A 20 percent chance of light Showers in the morning. Highs in the mid 80s. Southeast Winds up to 5 Mph.

Tonight 18 Sep Iowa

Partly cloudy with slight chance of light Showers and Thunderstorms through around Midnight, then mostly cloudy with chance of light Showers after midnight. Lows around 60. East Winds up to 10 Mph. Chance of precipitation 30 percent.

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Birch Lake Park Temperature Statistics

September Temperature

Iowa County Airport (18 miles)

  • Lowest 1 September, 2025

    51.8 °F

  • Average September

    60.8 °F

  • Highest 1 September, 2025

    71.6 °F

Climate (2020–Present)

Iowa County Airport (18 miles)

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  • Average Low 2020–2025

    41.6 °F

  • Average 2020–2025

    50.1 °F

  • Average High 2020–2025

    58.7 °F
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