Clear Lake Weather Forecast

    • 36
    • 90

    Thunderstorms

    • 28
    • 50

    Becoming Sunny

    • 41
    • 53

    Partly Sunny

    • 53
    • 63

    Mostly Cloudy

    • 63
    • 81

    Chance Rain Showers

    • 56
    • 85

    Chance Thunderstorms

    • 53
    • 74

    Rain Showers Likely

Today 26 Mar Sangamon

Mostly sunny with a slight chance of Showers and Thunderstorms. Much warmer. Near steady temperature in the upper 80s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

Tonight 26 Mar Sangamon

Showers and Thunderstorms. Breezy and much cooler with Lows in the mid 30s. North Winds 15 to 25 Mph with Gusts up to 45 Mph. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clear Lake Temperature Statistics

March Temperature

Springfield - Abraham Lincoln Capital Airport (6.2 miles)

  • Lowest 17 March, 2026

    11.6 °F

  • Average March

    48.5 °F

  • Highest 20 March, 2026

    85.6 °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

    55.3 °F

  • Average High 2021–2026

    65.4 °F
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