Clear Lake Weather Forecast

    • 58
    • 80

    Becoming Sunny

    • 65
    • 84

    Increasing Clouds

    • 64
    • 88

    Chance Rain Showers

    • 62
    • 86

    Mostly Sunny

    • 63
    • 86

    Mostly Sunny

    • 68
    • 88

    Partly Sunny

    • 73
    • 92

    Partly Sunny

Today 24 Aug Sangamon

Partly sunny. Near steady temperature in the upper 70s. Northeast Winds around 5 Mph.

Tonight 24 Aug Sangamon

Mostly clear. Patchy fog after midnight. Lows in the upper 50s. East Winds around 5 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 21 August, 2026

    59.6 °F

  • Average August

    76.8 °F

  • Highest 11 August, 2026

    92.6 °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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