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Mammoth Cave National Park, KY Weather Forecast
Wx Discussion - Wx Hazards - Wx Aviation
NWS Forecast for Mammoth Cave KY
National Weather Service Forecast for: Mammoth Cave KY
Issued by: National Weather Service Louisville, KY
Updated: 2:17 am CDT Jul 26, 2026
 
Overnight

Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 71. Calm wind.
Patchy Fog

 Sunday

Sunday: Areas of fog before 9am. Otherwise, partly sunny, with a high near 88. Light northwest wind.
Areas Fog
then Partly
Sunny
 Sunday
Night
Sunday Night: A 50 percent chance of showers and thunderstorms, mainly after 3am. Partly cloudy, with a low around 72. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Partly Cloudy
then Chance
T-storms
 Monday

Monday: A 30 percent chance of showers and thunderstorms, mainly between 10am and noon. Partly sunny, with a high near 92. Heat index values as high as 103. Calm wind becoming southwest around 5 mph in the afternoon.
Chance
T-storms then
Partly Sunny
 Monday
Night
Monday Night: Partly cloudy, with a low around 77. Calm wind becoming southwest around 5 mph after midnight.
Partly Cloudy

 Tuesday

Tuesday: Sunny, with a high near 93.
Sunny

 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 70.
Partly Cloudy

 Wednesday

Wednesday: Sunny, with a high near 88.
Sunny

 Wednesday
Night
Wednesday Night: Clear, with a low around 65.
Clear
Lo 71 °F Hi 88 °F Lo 72 °F Hi 92 °F Lo 77 °F Hi 93 °F Lo 70 °F Hi 88 °F Lo 65 °F

 

Overnight
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 71. Calm wind.
Sunday
 
 Areas of fog before 9am. Otherwise, partly sunny, with a high near 88. Light northwest wind.
Sunday Night
 
 A 50 percent chance of showers and thunderstorms, mainly after 3am. Partly cloudy, with a low around 72. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
 
 A 30 percent chance of showers and thunderstorms, mainly between 10am and noon. Partly sunny, with a high near 92. Heat index values as high as 103. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
 
 Partly cloudy, with a low around 77. Calm wind becoming southwest around 5 mph after midnight.
Tuesday
 
 Sunny, with a high near 93.
Tuesday Night
 
 Partly cloudy, with a low around 70.
Wednesday
 
 Sunny, with a high near 88.
Wednesday Night
 
 Clear, with a low around 65.
Thursday
 
 Sunny, with a high near 88.
Thursday Night
 
 Mostly clear, with a low around 65.
Friday
 
 Mostly sunny, with a high near 88.
Friday Night
 
 Partly cloudy, with a low around 69.
Saturday
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.

 

Forecast from NOAA-NWS for Mammoth Cave KY.

Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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