Brown County State Lake Weather Forecast

    • 56
    • 70

    Cloudy

    • 50
    • 66

    Mostly Cloudy

    • 51
    • 67

    Partly Sunny

    • 55
    • 67

    Chance Rain Showers

    • 59
    • 69

    Chance Rain Showers

    • 61
    • 71

    Chance Rain Showers

Today 21 Sep Brown

Cloudy. A slight chance of very light drizzle this morning. Highs in the lower 70s. North Winds around 5 Mph.

Tonight 21 Sep Brown

Cloudy. Lows in the mid 50s. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Brown County State Lake Temperature Statistics

September Temperature

Falls City, Brenner Field Airport (19.3 miles)

  • Lowest 13 September, 2026

    58.6 °F

  • Average September

    79.3 °F

  • Highest 8 September, 2026

    100.7 °F

Climate (2021–2026)

Falls City, Brenner Field Airport (19.3 miles)

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  • Average Low 2021–2026

    44.2 °F

  • Average 2021–2026

    55.5 °F

  • Average High 2021–2026

    67 °F
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