Clear Lake Weather Forecast

    • 75
    • 90

    Chance Thunderstorms

    • 64
    • 89

    Slight Chance Thunderstorms

    • 57
    • 79

    Mostly Sunny

    • 59
    • 79

    Partly Sunny

    • 61
    • 78

    Slight Chance Rain Showers

    • 66
    • 85

    Mostly Sunny

    • 72
    • 91

    Mostly Sunny

Today 20 Jul Sangamon

Mostly sunny. Patchy smoke. Highs around 90. Southwest Winds around 5 Mph.

Tonight 20 Jul Sangamon

Partly cloudy with a slight chance of Showers and Thunderstorms this Evening, then mostly cloudy with a chance of Showers and Thunderstorms after midnight. Lows in the mid 70s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clear Lake Temperature Statistics

July Temperature

Springfield - Abraham Lincoln Capital Airport (6.2 miles)

  • Lowest 13 July, 2026

    63.6 °F

  • Average July

    78.9 °F

  • Highest 2 July, 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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