National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Springfield - Abraham Lincoln Capital Airport (KSPI)

Lat: 39.85°NLon: 89.68°WElev: 587ft.

Fair

55°F

13°C

Humidity 93%
Wind Speed Calm
Barometer 29.98 in (1014.8 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 3 Sep 12:52 am CDT
Extended Forecast for

Clear Lake IL

  • Overnight

    Overnight: Mostly clear, with a low around 55. Calm wind.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 4pm. Increasing clouds, with a high near 83. Light southwest wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 50%.

    High: 83 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 51. North northwest wind 6 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Showers
    Likely

  • Thursday

    Thursday: Sunny, with a high near 73. North northwest wind around 7 mph.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 57. Light southwest wind becoming south southwest 6 to 11 mph in the evening. Winds could gust as high as 20 mph.

    Low: 57 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly sunny, with a high near 73. West northwest wind 10 to 13 mph, with gusts as high as 18 mph.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 46. West northwest wind 5 to 8 mph becoming calm after midnight.

    Low: 46 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 55. Calm wind.
Wednesday
A chance of showers, with thunderstorms also possible after 4pm. Increasing clouds, with a high near 83. Light southwest wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 50%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 51. North northwest wind 6 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Sunny, with a high near 73. North northwest wind around 7 mph.
Thursday Night
Increasing clouds, with a low around 57. Light southwest wind becoming south southwest 6 to 11 mph in the evening. Winds could gust as high as 20 mph.
Friday
Mostly sunny, with a high near 73. West northwest wind 10 to 13 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 46. West northwest wind 5 to 8 mph becoming calm after midnight.
Saturday
Sunny, with a high near 74.
Saturday Night
Mostly clear, with a low around 47.
Sunday
Sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 52.
Monday
Partly sunny, with a high near 75.
Monday Night
Mostly cloudy, with a low around 57.
Tuesday
Partly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IL
 39.82°N 89.57°W (Elev. 554 ft)
Last Update:
12:40 am CDT Sep 3, 2025
Forecast Valid:
1am CDT Sep 3, 2025-6pm CDT Sep 9, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation