Heat Persists in the South Central U.S. and Southwest; Heavy rains in the Desert Southwest and Central Plains

Sweltering heat remains across the South-Central Plains, Lower/Middle Mississippi Valley, and the Southwest this week with limited nighttime relief. Thunderstorms will bring heavy rainfall leading to localized flash flooding in portions of the Desert Southwest and central Plains. Isolated strong to severe thunderstorms are possible across portions of the central Plains into the Northeast. Read More >

Hazardous Weather Conditions

Current conditions at

Springfield - Abraham Lincoln Capital Airport (KSPI)

Lat: 39.85°NLon: 89.68°WElev: 587ft.

Fair

76°F

24°C

Humidity 69%
Wind Speed N 7 mph
Barometer 30.03 in (1016.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 9 Sep 5:52 pm CDT
Extended Forecast for

Mechanicsburg IL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 2am.  Mostly cloudy, with a low around 70. North northwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 70 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms, mainly between 11am and 4pm.  Mostly cloudy, with a high near 80. Calm wind becoming north around 6 mph in the morning.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 80 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60. North northeast wind around 5 mph becoming calm  in the evening.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 83. Southeast wind 3 to 7 mph.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64. Southeast wind 3 to 5 mph.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 88. Southwest wind 5 to 7 mph.

    High: 88 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66. Light and variable wind.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 70. North northwest wind 5 to 8 mph becoming calm in the evening.
Thursday
Showers likely and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms, mainly between 11am and 4pm. Mostly cloudy, with a high near 80. Calm wind becoming north around 6 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Partly cloudy, with a low around 60. North northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 83. Southeast wind 3 to 7 mph.
Friday Night
Partly cloudy, with a low around 64. Southeast wind 3 to 5 mph.
Saturday
Mostly sunny, with a high near 88. Southwest wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 66. Light and variable wind.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 92.
Monday Night
A chance of showers. Mostly clear, with a low around 70.
Tuesday
A chance of showers. Mostly sunny, with a high near 86.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 64.
Wednesday
A chance of showers. Mostly sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Mechanicsburg IL
 39.81°N 89.4°W (Elev. 577 ft)
6:11 pm CDT Sep 9, 2026
6pm CDT Sep 9, 2026-6pm CDT Sep 16, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database