National Weather Service Forecast for: Mammoth Cave KY
Issued by: National Weather Service Louisville, KY
Updated: 9:05 am CDT Jul 12, 2026
 
This
Afternoon
This Afternoon: Showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 82. Northeast wind 3 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
T-storms

 Tonight

Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 68. Light northeast wind.
Chance
T-storms then
Mostly Clear
 Monday

Monday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 85. Northeast wind 3 to 7 mph.
Mostly Sunny
then Chance
T-storms
 Monday
Night
Monday Night: A 30 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 68. Northeast wind around 5 mph becoming calm in the evening.
Chance
T-storms then
Mostly Clear
 Tuesday

Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 87. Calm wind becoming east around 5 mph in the afternoon.
Sunny then
Chance
T-storms
 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 69.
Partly Cloudy

 Wednesday

Wednesday: Sunny, with a high near 88.
Sunny

 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 71.
Partly Cloudy

 Thursday

Thursday: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 90.
Slight Chance
T-storms
Hi 82 °F Lo 68 °F Hi 85 °F Lo 68 °F Hi 87 °F Lo 69 °F Hi 88 °F Lo 71 °F Hi 90 °F

Flood Watch
Flood Advisory
 

This Afternoon
 
 Showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 82. Northeast wind 3 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
 
 A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 68. Light northeast wind.
Monday
 
 A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 85. Northeast wind 3 to 7 mph.
Monday Night
 
 A 30 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 68. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
 
 A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 87. Calm wind becoming east around 5 mph in the afternoon.
Tuesday Night
 
 Partly cloudy, with a low around 69.
Wednesday
 
 Sunny, with a high near 88.
Wednesday Night
 
 Partly cloudy, with a low around 71.
Thursday
 
 A 20 percent chance of showers and thunderstorms. Sunny, with a high near 90.
Thursday Night
 
 Mostly clear, with a low around 72.
Friday
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Friday Night
 
 Partly cloudy, with a low around 72.
Saturday
 
 A 20 percent chance of showers and thunderstorms. Sunny, with a high near 90.

 

Forecast from NOAA-NWS for Mammoth Cave KY.