Clear Lake Weather Forecast

    • 48
    • 74

    Sunny

    • 54
    • 82

    Rain Showers Likely

    • 46
    • 74

    Sunny

    • 53
    • 73

    Chance Thunderstorms

    • 62
    • 78

    Chance Thunderstorms

    • 64
    • 85

    Chance Rain Showers

Today 11 May Sangamon

Sunny. Highs in the lower 70s. West Winds 5 to 10 Mph, becoming northwest this afternoon.

Tonight 11 May Sangamon

Mostly clear. Lows in the upper 40s. Northeast Winds around 5 Mph, becoming southeast with Gusts up to 20 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Clear Lake Temperature Statistics

May Temperature

Springfield - Abraham Lincoln Capital Airport (6.2 miles)

  • Lowest 7 May, 2026

    39.7 °F

  • Average May

    55.4 °F

  • Highest 4 May, 2026

    78.7 °F

Climate (2021–Present)

Springfield - Abraham Lincoln Capital Airport (6.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    45 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    65.5 °F
Get WillyWeather+ to remove ads