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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Louisville Muhammad Ali International Airport (KSDF)

Lat: 38.17°NLon: 85.74°WElev: 500ft.

Mostly Cloudy

88°F

31°C

Humidity 59%
Wind Speed SE 6 mph
Barometer 30.17 in (1020.9 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 18 Sep 11:56 am EDT
Extended Forecast for

Louisville KY

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Sunny, with a high near 93. Heat index values as high as 103. Calm wind becoming northwest around 5 mph.

    High: 93 °F

    Chance
    Showers

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70. North wind 5 to 7 mph becoming light and variable after midnight.

    Low: 70 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 93. Heat index values as high as 101. Light and variable wind.

    High: 93 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 11pm. Partly cloudy, with a low around 72. South wind 3 to 5 mph.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 93. South wind 5 to 8 mph.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers before 2am. Partly cloudy, with a low around 70.

    Low: 70 °F

    Slight Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87.

    High: 87 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 78. Chance of precipitation is 40%.

    High: 78 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Sunny, with a high near 93. Heat index values as high as 103. Calm wind becoming northwest around 5 mph.
Tonight
A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70. North wind 5 to 7 mph becoming light and variable after midnight.
Saturday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 93. Heat index values as high as 101. Light and variable wind.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 11pm. Partly cloudy, with a low around 72. South wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 93. South wind 5 to 8 mph.
Sunday Night
A 20 percent chance of showers before 2am. Partly cloudy, with a low around 70.
Monday
A 40 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87.
Monday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Tuesday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 78. Chance of precipitation is 40%.
Tuesday Night
A slight chance of thunderstorms before 8pm. Mostly cloudy, with a low around 61. Chance of precipitation is 10%.
Wednesday
Partly sunny, with a high near 75.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
Partly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Louisville KY
 38.22°N 85.75°W (Elev. 492 ft)
Last Update:
12:01 pm EDT Sep 18, 2026
Forecast Valid:
12pm EDT Sep 18, 2026-6pm EDT Sep 24, 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