Clear Lake Weather Forecast

    • 64
    • 94

    Mostly Sunny

    • 69
    • 96

    Mostly Sunny

    • 66
    • 93

    Chance Thunderstorms

    • 66
    • 89

    Rain Showers Likely

    • 67
    • 89

    Chance Thunderstorms

    • 59
    • 84

    Chance Rain Showers

Today 3 Sep Brown

Sunny. A slight chance of Showers and Thunderstorms in the morning. Highs in the mid 90s. Southwest Winds up to 10 Mph. Chance of precipitation 20 percent.

Tonight 3 Sep Brown

Clear. Lows in the mid 60s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clear Lake Temperature Statistics

September Temperature

Ainsworth Regional Airport (21.7 miles)

  • Lowest 1 September, 2026

    64.8 °F

  • Average September

    72.1 °F

  • Highest 1 September, 2026

    82.9 °F

Climate (2021–2026)

Ainsworth Regional Airport (21.7 miles)

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  • Average Low 2021–2026

    38.1 °F

  • Average 2021–2026

    49.9 °F

  • Average High 2021–2026

    62.5 °F
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