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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

75°F

24°C

Humidity 76%
Wind Speed W 10 mph
Barometer 29.67 in (1004.2 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 1 Aug 3:53 pm CDT
Extended Forecast for

Madison IL

  • This Afternoon

    This Afternoon: Drizzle, mainly after 5pm. Patchy fog before 5pm. Otherwise, cloudy, with a high near 75. Northwest wind around 8 mph.

    High: 75 °F

    Drizzle and
    Patchy Fog

  • Tonight

    Tonight: Drizzle and possibly a thunderstorm before 8pm, then areas of drizzle and thunderstorms between 8pm and 11pm, then areas of drizzle after 11pm. Patchy fog before 7pm. Otherwise, cloudy, with a low around 69. North wind 13 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Low: 69 °F

    T-storms and
    Patchy Fog
    then Areas
    Drizzle

  • Sunday

    Sunday: Patchy drizzle before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 82. North wind around 15 mph, with gusts as high as 24 mph.

    High: 82 °F

    Patchy
    Drizzle then
    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67. North wind 6 to 11 mph becoming light after midnight.

    Low: 67 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 86. North wind 3 to 6 mph.

    High: 86 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

Detailed Forecast

This Afternoon
Drizzle, mainly after 5pm. Patchy fog before 5pm. Otherwise, cloudy, with a high near 75. Northwest wind around 8 mph.
Tonight
Drizzle and possibly a thunderstorm before 8pm, then areas of drizzle and thunderstorms between 8pm and 11pm, then areas of drizzle after 11pm. Patchy fog before 7pm. Otherwise, cloudy, with a low around 69. North wind 13 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Sunday
Patchy drizzle before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 82. North wind around 15 mph, with gusts as high as 24 mph.
Sunday Night
Partly cloudy, with a low around 67. North wind 6 to 11 mph becoming light after midnight.
Monday
Mostly sunny, with a high near 86. North wind 3 to 6 mph.
Monday Night
Mostly clear, with a low around 66.
Tuesday
Sunny, with a high near 87.
Tuesday Night
Mostly clear, with a low around 69.
Wednesday
Sunny, with a high near 89.
Wednesday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.
Thursday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Madison IL
 38.66°N 90.14°W (Elev. 407 ft)
Last Update:
1:26 pm CDT Aug 1, 2026
Forecast Valid:
4pm CDT Aug 1, 2026-6pm CDT Aug 8, 2026
 
Forecast Discussion
 
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Additional Resources

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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