Mammoth Cave National Park Average Rainfall by Month

This page shows the average precipitation in each month of the year in Mammoth Cave National Park, Kentucky. It is based on NOAA data for the years 1991–2020.

Average temperature by month

What's the Rainiest Month in Mammoth Cave National Park?

In Mammoth Cave National Park, March has the greatest precipitation of any month. On average, Mammoth Cave National Park gets 5.3 inches of precipitation in March.

March is also the month where rain is most common. 41.6% of days in March will have at least some rain.

What's the Driest Month in Mammoth Cave National Park?

In Mammoth Cave National Park, October has the least precipitation of any month. On average, Mammoth Cave National Park gets 3.74 inches of precipitation in October.

September is the month with the lowest chance of precipitation. 26.3% of days in September will have measurable rain.

Month	Precipitation	% Chance
January	3.77 in	37.1
February	4.39 in	38.7
March	5.26 in	41.6
April	5.02 in	39.6
May	5.23 in	39.0
June	4.97 in	39.6
July	4.91 in	34.5
August	3.93 in	29.2
September	3.91 in	26.3
October	3.74 in	29.0
November	4.12 in	31.7
December	4.67 in	37.0
Year	53.98 in	35.1

Weather Station Details

Years	Station	Coordinates
1934–2024	Mammoth Cave	location