Mammoth Cave National Park
Kentucky, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Mammoth Cave National Park, KY

The attractive frozen Niagara in the historical Mammoth Cave National Park, Kentucky
The attractive frozen Niagara in the historical Mammoth Cave National Park, Kentucky
May, the last month of the spring, in Mammoth Cave National Park, is a warm month, with temperature in the range of an average low of 53.6°F (12°C) and an average high of 77°F (25°C).

Temperature

In Mammoth Cave National Park, the average high-temperature rises, from an agreeable 68°F (20°C) in April, to a moderately hot 77°F (25°C). The average low-temperature, in Mammoth Cave National Park, is 53.6°F (12°C).

Rainfall

May is the month with the most rainfall in Mammoth Cave National Park. Rain falls for 12 days and accumulates 5" (127mm) of precipitation.

Daylight

The average length of the day is 14.2h.

Sunshine

In May, the average sunshine is 9h.

UV index

In Mammoth Cave National Park, the average daily maximum UV index is 8. A UV Index estimate of 8 to 10 represents a very high health vulnerability from unsafe exposure to the UV radiation for the average person.
In May, the average maximum UV index of 8 translate into the following recommendations:
Take special precautions, as unprotected skin can be damaged and can burn quickly. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in May in Mammoth Cave National Park?

The average high-temperature, in May, in Mammoth Cave National Park, Kentucky, is 77°F (25°C), while the average low-temperature is 53.6°F (12°C).

How much does it rain in Mammoth Cave National Park in May?

In Mammoth Cave National Park, during May, the rain falls for 12 days and regularly aggregates up to 5" (127mm) of precipitation.

What is the rainiest month in Mammoth Cave National Park?

May is the month with the most rainfall in Mammoth Cave National Park, Kentucky. Rain falls for 12 days and accumulates 5" (127mm) of precipitation.

How many hours of daylight does Mammoth Cave National Park have in May?

In Mammoth Cave National Park, Kentucky, the average length of the day in May is 14.2h.

How many hours of sunshine does Mammoth Cave National Park have in May?

The average sunshine in May in Mammoth Cave National Park, Kentucky, is 9h.

What is the UV index reading in May in Mammoth Cave National Park?

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 vulnerability from the exposure to the Sun's UV rays.
Average temperature in May - Mammoth Cave National Park, KY
  • Average high temperature in May: 77°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (41°F).

  • Average low temperature in May: 54°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (23°F).

Average rainfall in May - Mammoth Cave National Park, KY
  • Average rainfall in May: 5"

The wettest month (with the highest rainfall) is May (5").
The driest month (with the lowest rainfall) is October (3").

Average rainfall days in May - Mammoth Cave National Park, KY
  • Average rainfall days in May: 12 days

The month with the highest number of rainy days is March (13 days).
Months with the lowest number of rainy days are September and October (8 days).

Average daylight in May / Average sunshine in May - Mammoth Cave National Park, KY
  • Average daylight in May: 14.2h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).

  • Average sunshine in May: 9h

The month with most sunshine is June (Average sunshine: 10h).
Months with least sunshine are January and December (Average sunshine: 4).

Average UV index in May - Mammoth Cave National Park, KY
  • Average UV index in May: 8

Months with the highest UV index are June and July (UV index 10).
Months with the lowest UV index are January and December (UV index 2).