As
September approaches,
Mammoth Cave National Park enjoys significant weather changes that mark the onset of fall. Temperature and daylight hours decrease noticeably, carrying mild and shorter days. Rainfall sustains its rhythm, keeping the park nourished and preparing it for the shifting season. With a declining UV index, sun exposure becomes more comfortable, enhancing outdoor experiences. September bridges summer's vibrancy with autumn's tranquility, marking an appealing time for explorers and nature lovers.
Temperature
September marks a gentle change in average high-temperature, declining from
August's tropical 86°F (30°C) to a warm 80.6°F (27°C). September nights in Mammoth Cave National Park experience a distinct temperature drop from the daily highs, with an average low-temperature of 57.2°F (14°C).
Rainfall
In Mammoth Cave National Park, during September, the rain falls for 8 days and regularly aggregates up to 3.74" (95mm) of precipitation. Throughout the year, in Mammoth Cave National Park, there are 126 rainfall days, and 50.63" (1286mm) of precipitation is accumulated.
Daylight
The average length of the day in September is 12h and 25min.
On the first day of September in Mammoth Cave National Park, sunrise is at 6:15 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 6:28 pm CDT.
Sunshine
The average sunshine in September is 8h.
UV index
In September, the average daily maximum UV index in Mammoth Cave National Park is 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.