Clear Lake Weather Forecast

    • 45
    • 70

    Increasing Clouds

    • 47
    • 76

    Partly Sunny

    • 54
    • 76

    Mostly Sunny

    • 34
    • 73

    Mostly Cloudy

    • 32
    • 50

    Mostly Cloudy

    • 40
    • 56

    Mostly Cloudy

Today 19 Mar Sangamon

Sunny. Highs around 70. South Winds around 5 Mph, becoming northeast in the afternoon.

Tonight 19 Mar Sangamon

Mostly clear. Lows in the mid 40s. East Winds around 5 Mph, becoming south after midnight.

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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 16 March, 2026

    18 °F

  • Average March

    47.3 °F

  • Highest 10 March, 2026

    84 °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

    65.3 °F
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