National Weather Service Forecast for: Mammoth Cave KY
Issued by: National Weather Service Louisville, KY
Updated: 4:06 pm CDT May 26, 2026
 
Tonight

Tonight: A 50 percent chance of showers and thunderstorms, mainly after 3am.  Mostly cloudy, with a low around 67. Light south wind.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Chance
Showers
Wednesday

Wednesday: A chance of showers, with thunderstorms also possible after 10am.  Partly sunny, with a high near 81. Southwest wind 3 to 6 mph.  Chance of precipitation is 40%.
Chance
Showers then
Chance
T-storms
Wednesday
Night
Wednesday Night: Showers and thunderstorms likely before 11pm, then a slight chance of showers after 1am.  Patchy fog after 3am.  Otherwise, increasing clouds, with a low around 65. Calm wind.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Showers
Likely then
Slight Chance
Showers and
Patchy Fog
Thursday

Thursday: A 20 percent chance of showers and thunderstorms after 1pm.  Patchy fog before 7am.  Otherwise, partly sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon.
Patchy Fog
then Slight
Chance
T-storms
Thursday
Night
Thursday Night: Mostly cloudy, with a low around 62. Light northeast wind.
Mostly Cloudy


Friday

Friday: Partly sunny, with a high near 80.
Partly Sunny


Friday
Night
Friday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Chance
Showers

Saturday

Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 80. Chance of precipitation is 30%.
Slight Chance
Showers then
Chance
T-storms
Saturday
Night
Saturday Night: Partly cloudy, with a low around 61.
Partly Cloudy


Lo 67 °F Hi 81 °F Lo 65 °F Hi 82 °F Lo 62 °F Hi 80 °F Lo 63 °F Hi 80 °F Lo 61 °F

 

Tonight
 
A 50 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 67. Light south wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 81. Southwest wind 3 to 6 mph. Chance of precipitation is 40%.
Wednesday Night
 
Showers and thunderstorms likely before 11pm, then a slight chance of showers after 1am. Patchy fog after 3am. Otherwise, increasing clouds, with a low around 65. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
 
A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
 
Mostly cloudy, with a low around 62. Light northeast wind.
Friday
 
Partly sunny, with a high near 80.
Friday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Saturday
 
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 30%.
Saturday Night
 
Partly cloudy, with a low around 61.
Sunday
 
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 80.
Sunday Night
 
Partly cloudy, with a low around 59.
Monday
 
Mostly sunny, with a high near 79.
Monday Night
 
Mostly clear, with a low around 57.
Tuesday
 
Sunny, with a high near 78.

 

Forecast from NOAA-NWS for Mammoth Cave KY.