May weather forecast
Mammoth Cave National Park, KY

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 warm 77°F (25°C). Mammoth Cave National Park experiences a drastic reduction from day temperatures to an average low of 53.6°F (12°C) in May.

Rainfall

The month with the most rainfall is May, when the rain falls for 12 days and typically aggregates up to 5" (127mm) of precipitation.

Daylight

In Mammoth Cave National Park, the average length of the day in May is 14h and 11min.
On the first day of the month, sunrise is at 5:48 am and sunset at 7:34 pm. On the last day of May, sunrise is at 5:25 am and sunset at 7:58 pm CDT.

Sunshine

In May, the average sunshine is 9h.

UV index

In Mammoth Cave National Park, the average daily maximum UV index in May is 8. A UV Index of 8 to 10 symbolizes a very high health hazard from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 8 during May morphs into the following directions:
Precautions are essential; the risk of damage to unprotected skin and eyes is too high. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.