NWS Forecast for Mammoth Cave KY

National Weather Service Forecast for: Mammoth Cave KY
Issued by: National Weather Service Louisville, KY

Updated: 4:41 am CST Dec 22, 2025

Today Mostly Sunny then Slight Chance Showers	Tonight Chance Showers then Showers Likely	Tuesday Chance Showers	Tuesday Night Showers Likely	Wednesday Chance Showers	Wednesday Night Slight Chance Showers then Mostly Cloudy	Christmas Day Mostly Cloudy	Thursday Night Mostly Cloudy	Friday Slight Chance Showers then Mostly Cloudy
Hi 58 °F	Lo 49 °F	Hi 60 °F	Lo 55 °F	Hi 64 °F	Lo 58 °F	Hi 69 °F	Lo 60 °F	Hi 68 °F

Today	A slight chance of showers between 2pm and 3pm. Increasing clouds, with a high near 58. Calm wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 20%.
Tonight	Showers likely, mainly after 1am. Cloudy, with a low around 49. South wind 6 to 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday	A 40 percent chance of showers. Cloudy, with a high near 60. Southwest wind 3 to 6 mph.
Tuesday Night	Showers likely, mainly after midnight. Cloudy, with a low around 55. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday	A 50 percent chance of showers. Cloudy, with a high near 64. Calm wind becoming south around 5 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night	A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 58.
Christmas Day	Mostly cloudy, with a high near 69.
Thursday Night	Mostly cloudy, with a low around 60.
Friday	A 20 percent chance of showers before noon. Mostly cloudy, with a high near 68.
Friday Night	Partly cloudy, with a low around 52.
Saturday	Mostly cloudy, with a high near 67.
Saturday Night	A 50 percent chance of showers. Mostly cloudy, with a low around 44.
Sunday	A 40 percent chance of showers. Mostly cloudy, with a high near 50.

Forecast from NOAA-NWS for Mammoth Cave KY.