Clear Lake Weather Forecast

    • 34
    • 47

    Partly Cloudy

    • 35
    • 54

    Mostly Cloudy

    • 15
    • 36

    Partly Sunny

    • 22
    • 29

    Chance Snow

    • 15
    • 38

    Chance Snow

    • 6
    • 23

    Slight Chance Snow

    • 9
    • 21

    Partly Sunny

Today 12 Jan Sangamon

Sunny. Not as cool with Highs in the upper 40s. Southwest Winds around 10 Mph.

Tonight 12 Jan Sangamon

Mostly clear this Evening, then becoming partly cloudy. Not as cool with Lows in the mid 30s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clear Lake Temperature Statistics

January Temperature

Springfield - Abraham Lincoln Capital Airport (6.2 miles)

  • Lowest 1 January, 2026

    21 °F

  • Average January

    38.7 °F

  • Highest 8 January, 2026

    64 °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

    55.2 °F

  • Average High 2021–2026

    65.1 °F
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