Clear Lake Weather Forecast

    • 76
    • 89

    Partly Sunny

    • 74
    • 93

    Chance Thunderstorms

    • 72
    • 90

    Chance Thunderstorms

    • 70
    • 87

    Rain Showers

    • 70
    • 85

    Chance Rain Showers

    • 73
    • 90

    Slight Chance Thunderstorms

    • 69
    • 88

    Chance Rain Showers

Today 10 Aug Sangamon

Mostly sunny with isolated Showers and Thunderstorms. Near steady temperature in the upper 80s. Southwest Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent. Heat index Values up to 100.

Tonight 10 Aug Sangamon

Partly cloudy. Lows in the mid 70s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clear Lake Temperature Statistics

August Temperature

Springfield - Abraham Lincoln Capital Airport (6.2 miles)

  • Lowest 3 August, 2026

    60.7 °F

  • Average August

    74.6 °F

  • Highest 7 August, 2026

    88.6 °F

Climate (2021–2026)

Springfield - Abraham Lincoln Capital Airport (6.2 miles)

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  • Average Low 2021–2026

    45 °F

  • Average 2021–2026

    55.5 °F

  • Average High 2021–2026

    65.6 °F
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