The arrival of
May indicates the nearing summer season: temperatures rise, reaching up to 77°F (25°C), making it one of the warmer months in
Mammoth Cave National Park. Aligned with this rise in temperature, the daylight duration also increases, promoting longer outdoor activities. Intermittent rain showers continue, ensuring the park maintains its lush landscapes. High UV index ratings require the use of sun protection for visitors exploring the park during peak hours. May weather invites ample opportunities to experience the outdoors and the park's natural splendors.
Temperature
Entering May, Mammoth Cave National Park sees a temperature rise, with the average high-temperature advancing from
April's pleasant 68°F (20°C) to a moderately hot 77°F (25°C). May nights in Mammoth Cave National Park bring a pronounced temperature shift, with averages hovering around a cool 53.6°F (12°C).
Rainfall
The month with the most rainfall in Mammoth Cave National Park is May, when the rain falls for 12 days and typically aggregates up to 5" (127mm) of precipitation.
Daylight
In May, the average length of the day in Mammoth Cave National Park is 14h and 11min.
On the first day of May in Mammoth Cave National Park, sunrise is at 5:48 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 5:25 am and sunset at 7:58 pm CDT.
Sunshine
The average sunshine in May is 9h.
UV index
In May, the average daily maximum UV index in Mammoth Cave National Park,
Kentucky, is 8. A UV Index reading of 8 to 10 represents a very high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 8 in May converts into the following recommendations:
Without adequate protection, skin and eyes might suffer damage. Ensure precautions are in place. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.