Clear Lake Weather Forecast

    • 62
    • 84

    Mostly Sunny

    • 66
    • 87

    Mostly Sunny

    • 67
    • 86

    Rain Showers

    • 65
    • 81

    Rain Showers Likely

    • 65
    • 83

    Slight Chance Thunderstorms

    • 69
    • 85

    Slight Chance Thunderstorms

    • 71
    • 89

    Partly Sunny

Today 3 Aug Sangamon

Mostly sunny. Near steady temperature in the lower 80s. East Winds around 5 Mph.

Tonight 3 Aug Sangamon

Mostly clear. Lows in the lower 60s. Southeast 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 1 August, 2026

    68 °F

  • Average August

    69.9 °F

  • Highest 1 August, 2026

    73 °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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