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

Heat Wave Continues; Areas of Severe Thunderstorms and Heavy Rain

Prolonged and intense heat wave continues into Friday with relief expected by this weekend. Extreme Heat Warnings and Heat Advisories remain in effect for portions of the Ohio Valley and the Southeast. Unsettled weather could produce severe weather and excessive rainfall for parts of the Central and Eastern U.S. Read More >

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Fair

70°F

21°C

Humidity 94%
Wind Speed Vrbl 3 mph
Barometer 29.92 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 27 Jun 4:55 am CDT
Extended Forecast for

Colusa IL

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Southwest wind around 10 mph.

    Low: 71 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 87. West wind around 10 mph.

    High: 87 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 68. Northwest wind around 5 mph becoming east after midnight.

    Low: 68 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 90. Southeast wind 5 to 10 mph becoming south in the morning.

    High: 90 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Chance of precipitation is 60%.

    High: 88 °F

    Chance
    T-storms then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.

    Low: 69 °F

    T-storms
    Likely then
    Showers
    Likely

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 86. Chance of precipitation is 40%.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Southwest wind around 10 mph.
Friday
A 20 percent chance of showers and thunderstorms before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 87. West wind around 10 mph.
Friday Night
Partly cloudy, with a low around 68. Northwest wind around 5 mph becoming east after midnight.
Saturday
Mostly sunny, with a high near 90. Southeast wind 5 to 10 mph becoming south in the morning.
Saturday Night
Partly cloudy, with a low around 72.
Sunday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Monday Night
Mostly clear, with a low around 65.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 66.
Thursday
Sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Colusa IL
 40.56°N 91.15°W (Elev. 669 ft)
Last Update:
4:31 am CDT Jun 27, 2025
Forecast Valid:
5am CDT Jun 27, 2025-6pm CDT Jul 3, 2025
 
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