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

Hazardous Weather Conditions

Current conditions at

Springfield - Abraham Lincoln Capital Airport (KSPI)

Lat: 39.85°NLon: 89.68°WElev: 587ft.

Overcast

81°F

27°C

Humidity 79%
Wind Speed S 13 G 22 mph
Barometer 29.92 in (1012.4 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 10 Aug 1:52 am CDT
Extended Forecast for

Chatham IL

Heat Advisory August 10, 12:00pm until August 10, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 75. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 75 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 5pm. Increasing clouds, with a high near 91. Heat index values as high as 102. Southwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    High: 91 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 75. South southwest wind 6 to 9 mph, with gusts as high as 17 mph.

    Low: 75 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 93. Heat index values as high as 106. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 93 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 75. Southwest wind 5 to 7 mph.

    Low: 75 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 90. South southwest wind around 7 mph. Chance of precipitation is 50%.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.

    Low: 68 °F

    Showers
    Likely

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 75. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Monday
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 5pm. Increasing clouds, with a high near 91. Heat index values as high as 102. Southwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Monday Night
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 75. South southwest wind 6 to 9 mph, with gusts as high as 17 mph.
Tuesday
Mostly sunny, with a high near 93. Heat index values as high as 106. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
Partly cloudy, with a low around 75. Southwest wind 5 to 7 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 90. South southwest wind around 7 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Friday
A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 84.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Saturday
A chance of showers. Partly sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 71.
Sunday
Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chatham IL
 39.69°N 89.7°W (Elev. 600 ft)
Last Update:
1:51 am CDT Aug 10, 2026
Forecast Valid:
2am CDT Aug 10, 2026-6pm CDT Aug 16, 2026
 
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