National Weather Service Forecast for: Jeffersontown KY
Issued by: National Weather Service Louisville, KY
Updated: 2:26 am EDT Jun 30, 2026
 
Overnight

Overnight: Partly cloudy, with a low around 74. Light south wind.
Partly Cloudy

Tuesday

Tuesday: Sunny and hot, with a high near 95. Heat index values as high as 109. Southwest wind 3 to 7 mph.
Hot

Tuesday
Night
Tuesday Night: Mostly clear, with a low around 73. Southwest wind around 5 mph becoming calm  in the evening.
Mostly Clear

Wednesday

Wednesday: Sunny and hot, with a high near 96. Heat index values as high as 109. Calm wind becoming southwest around 5 mph in the afternoon.
Hot

Wednesday
Night
Wednesday Night: Mostly clear, with a low around 75. Light south wind.
Mostly Clear

Thursday

Thursday: Sunny and hot, with a high near 97.
Hot

Thursday
Night
Thursday Night: Mostly clear, with a low around 76.
Mostly Clear

Friday

Friday: A 40 percent chance of showers and thunderstorms after 2pm.  Sunny and hot, with a high near 95.
Sunny then
Chance
T-storms
Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms before 2am.  Partly cloudy, with a low around 74.
Chance
T-storms
Lo 74 °F Hi 95 °F Lo 73 °F Hi 96 °F Lo 75 °F Hi 97 °F Lo 76 °F Hi 95 °F Lo 74 °F

Extreme Heat Warning
 

Overnight
 
Partly cloudy, with a low around 74. Light south wind.
Tuesday
 
Sunny and hot, with a high near 95. Heat index values as high as 109. Southwest wind 3 to 7 mph.
Tuesday Night
 
Mostly clear, with a low around 73. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
 
Sunny and hot, with a high near 96. Heat index values as high as 109. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
 
Mostly clear, with a low around 75. Light south wind.
Thursday
 
Sunny and hot, with a high near 97.
Thursday Night
 
Mostly clear, with a low around 76.
Friday
 
A 40 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95.
Friday Night
 
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 74.
Independence Day
 
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 92.
Saturday Night
 
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Sunday
 
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Sunday Night
 
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Monday
 
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.

 

Forecast from NOAA-NWS for Jeffersontown KY.