Heat and Fire Weather Concerns West; Heavy Rain and Thunderstorms from Plains to mid-Atlantic

Thunderstorms and locally heavy rainfall is expected from the Central Plains to the Ohio Valley, mid-Atlantic and across the Southeast. Severe weather from the Upper Midwest to Central Plains increases on Friday. Major to Extreme HeatRisk continues across the Southern Plains to the lower Mississippi Valley late this week. Fire weather concerns for the northern Rockies and northern Plains today. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Light Rain

70°F

21°C

Humidity 94%
Wind Speed W 6 mph
Barometer 30.05 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 10 Sep 7:50 am CDT
Extended Forecast for

Hillsboro IL

  • Today

    Today: Showers and possibly a thunderstorm, mainly before 2pm, then a chance of showers and thunderstorms after 2pm.  High near 77. Calm wind becoming west around 5 mph.  Chance of precipitation is 90%.

    High: 77 °F

    Showers then
    Showers
    Likely

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 9pm.  Patchy fog after 3am.  Otherwise, mostly cloudy, with a low around 62. Calm wind.  Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Patchy Fog

  • Friday

    Friday: A 20 percent chance of showers after 2pm.  Patchy fog before 8am.  Otherwise, mostly cloudy, with a high near 81. Calm wind becoming east around 5 mph.

    High: 81 °F

    Patchy Fog
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers, mainly before 7pm.  Partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm.  Mostly sunny, with a high near 86. Calm wind becoming southwest around 5 mph.  Chance of precipitation is 20%.

    High: 86 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 64. Chance of precipitation is 20%.

    Low: 64 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm, mainly before 2pm, then a chance of showers and thunderstorms after 2pm. High near 77. Calm wind becoming west around 5 mph. Chance of precipitation is 90%.
Tonight
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 9pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 20%.
Friday
A 20 percent chance of showers after 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 81. Calm wind becoming east around 5 mph.
Friday Night
A 30 percent chance of showers, mainly before 7pm. Partly cloudy, with a low around 64. Calm wind.
Saturday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 86. Calm wind becoming southwest around 5 mph. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 65.
Monday
Sunny, with a high near 91.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 67.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Tuesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 61.
Wednesday
A 30 percent chance of showers. Mostly sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Hillsboro IL
 39.15°N 89.49°W (Elev. 617 ft)
5:51 am CDT Sep 10, 2026
8am CDT Sep 10, 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