May weather forecast
Mammoth Cave National Park, KY

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The attractive frozen Niagara in the historical Mammoth Cave National Park, Kentucky
The attractive frozen Niagara in the historical Mammoth Cave National Park, Kentucky

Weather in May

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.
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Frequently asked questions

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

In Mammoth Cave National Park, 77°F (25°C) is the average high-temperature and 53.6°F (12°C) is the average low-temperature during May.

What is the rainiest month in Mammoth Cave National Park?

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

How many days does it rain in May in Mammoth Cave National Park?

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

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

In May, the average day length in Mammoth Cave National Park is 14h and 11min.

When is the sunrise / sunset in May in Mammoth Cave National Park?

In May, on the first day of the month, 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.

How long on average sun shines in May in Mammoth Cave National Park?

The average sunshine duration in May is 9h.

How high is the UV index in May 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 risk from exposure to the Sun's UV radiation.
Average high temperature
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in May
Mammoth Cave National Park, KY

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).

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Average rainfall in May
Mammoth Cave National Park, KY

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 least rainfall) is October (3").

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Average rainfall days in May
Mammoth Cave National Park, KY

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).
The months with the least rainy days are September and October (8 days).

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Average daylight in May /
Average sunshine in May
Mammoth Cave National Park, KY

Average daylight in May / Average sunshine in May - Mammoth Cave National Park, KY
  • Average daylight in May: 14h and 1min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in May: 9h

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

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Average UV index in May
Mammoth Cave National Park, KY

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

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

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Mammoth Cave National Park, Kentucky, USA

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