Clear Lake Weather Forecast

    • 25
    • 31

    Snow

    • 12
    • 32

    Mostly Cloudy

    • -6
    • 17

    Snow

    • -8
    • 4

    Cold

    • 20
    • 28

    Partly Sunny

    • 31
    • 38

    Mostly Cloudy

    • 37
    • 48

    Chance Rain

Today 11 Dec Sangamon

Snow. Snow accumulation around an inch. Near steady temperature in the lower 30s. Southeast Winds around 5 Mph. Chance of snow 90 percent.

Tonight 11 Dec Sangamon

Snow, mainly this evening. Snow accumulation of 2 to 4 Inches. Near steady temperature in the upper 20s. Southeast Winds 5 to 10 Mph, becoming northeast after midnight. Chance of snow near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clear Lake Temperature Statistics

December Temperature

Springfield - Abraham Lincoln Capital Airport (6.2 miles)

  • Lowest 4 December, 2025

    1.9 °F

  • Average December

    24.5 °F

  • Highest 9 December, 2025

    41 °F

Climate (2020–Present)

Springfield - Abraham Lincoln Capital Airport (6.2 miles)

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  • Average Low 2020–2025

    44.9 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    65 °F
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