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

68°F

20°C

Humidity 61%
Wind Speed SE 5 mph
Barometer 30.06 in (1017.4 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 25 May 9:52 pm CDT
Extended Forecast for

Petersburg IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm after midnight.

    Low: 58 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 82. Calm wind becoming east southeast around 6 mph in the afternoon.

    High: 82 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 61. Light east southeast wind.

    Low: 61 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Calm wind becoming east northeast around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. Calm wind becoming northeast around 5 mph after midnight.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 85. East northeast wind 7 to 10 mph, with gusts as high as 17 mph.

    High: 85 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 59. East northeast wind 6 to 8 mph, with gusts as high as 16 mph.

    Low: 59 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm after midnight.
Tuesday
Increasing clouds, with a high near 82. Calm wind becoming east southeast around 6 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 61. Light east southeast wind.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Calm wind becoming east northeast around 6 mph in the afternoon. Chance of precipitation is 30%.
Wednesday Night
Mostly clear, with a low around 61. Calm wind becoming northeast around 5 mph after midnight.
Thursday
Mostly sunny, with a high near 85. East northeast wind 7 to 10 mph, with gusts as high as 17 mph.
Thursday Night
Mostly cloudy, with a low around 59. East northeast wind 6 to 8 mph, with gusts as high as 16 mph.
Friday
Partly sunny, with a high near 79.
Friday Night
Mostly cloudy, with a low around 57.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 54.
Monday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Petersburg IL
 40°N 89.82°W (Elev. 541 ft)
Last Update:
7:11 pm CDT May 25, 2026
Forecast Valid:
10pm CDT May 25, 2026-6pm CDT Jun 1, 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