National Weather Service Forecast for: Mammoth Cave KY
Issued by: National Weather Service Louisville, KY
Updated: 6:31 am CDT Sep 13, 2026
 
Today

Today: Sunny, with a high near 91. Southwest wind 3 to 6 mph.
Sunny
 Tonight

Tonight: Partly cloudy, with a low around 65. Calm wind becoming northeast 5 to 8 mph after midnight.
Partly Cloudy
 Monday

Monday: Mostly sunny, with a high near 85. Northeast wind 3 to 6 mph.
Mostly Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 66. Light east wind.
Mostly Clear
 Tuesday

Tuesday: Sunny and hot, with a high near 94. Light and variable wind.
Hot
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 72.
Mostly Clear
 Wednesday

Wednesday: Sunny, with a high near 93.
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 71.
Mostly Clear
 Thursday

Thursday: Sunny, with a high near 93.
Sunny
Hi 91 °F Lo 65 °F Hi 85 °F Lo 66 °F Hi 94 °F Lo 72 °F Hi 93 °F Lo 71 °F Hi 93 °F

 

Today
 
 Sunny, with a high near 91. Southwest wind 3 to 6 mph.
Tonight
 
 Partly cloudy, with a low around 65. Calm wind becoming northeast 5 to 8 mph after midnight.
Monday
 
 Mostly sunny, with a high near 85. Northeast wind 3 to 6 mph.
Monday Night
 
 Mostly clear, with a low around 66. Light east wind.
Tuesday
 
 Sunny and hot, with a high near 94. Light and variable wind.
Tuesday Night
 
 Mostly clear, with a low around 72.
Wednesday
 
 Sunny, with a high near 93.
Wednesday Night
 
 Mostly clear, with a low around 71.
Thursday
 
 Sunny, with a high near 93.
Thursday Night
 
 Mostly clear, with a low around 69.
Friday
 
 Sunny, with a high near 91.
Friday Night
 
 Partly cloudy, with a low around 67.
Saturday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.

 

Forecast from NOAA-NWS for Mammoth Cave KY.