Clear Lake Weather Forecast

    • 44
    • 85

    Rain Showers

    • 36
    • 55

    Chance Rain Showers

    • 36
    • 60

    Mostly Sunny

    • 50
    • 66

    Mostly Sunny

    • 55
    • 77

    Partly Sunny

    • 57
    • 80

    Partly Sunny

Today 17 Apr Sangamon

Partly sunny. A chance of Showers and Thunderstorms this afternoon. Breezy with Highs in the mid 80s. South Winds 10 to 15 Mph with Gusts up to 25 Mph, increasing to 20 to 25 Mph with Gusts up to 35 Mph this afternoon. Chance of rain 40 percent.

Tonight 17 Apr Sangamon

Showers with Thunderstorms likely. Cooler with Lows in the mid 40s. South Winds 15 to 20 Mph, becoming west after midnight. Gusts up to 35 Mph. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clear Lake Temperature Statistics

April Temperature

Springfield - Abraham Lincoln Capital Airport (6.2 miles)

  • Lowest 7 April, 2026

    35.7 °F

  • Average April

    58.7 °F

  • Highest 13 April, 2026

    82.9 °F

Climate (2021–Present)

Springfield - Abraham Lincoln Capital Airport (6.2 miles)

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  • Average Low 2021–2026

    44.9 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    65.5 °F
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