Climate and monthly weather forecast
Mammoth Cave National Park, KY

Situated in the heartland of Kentucky, United States, Mammoth Cave National Park experiences a Cfa climate as classified by Köppen scale, which is a humid subtropical climate with no dry season. Throughout the year, variations occur in each of the weather conditions making the park a diverse climatic region.

Beginning with temperatures, there's a substantial shift from the coldest to the warmest month with average temperatures ranging from 23°F (-5°C) to 88°F (31.1°C). The hottest months are generally July and August, with an average high of 88°F (31.1°C) and 86°F (30°C) respectively. Conversely, the coldest months are January and February where temperatures plummet to a low of 23°F (-5°C) and 25°F (-3.9°C) respectively.

Regarding precipitation, The National Park receives a significant amount of rainfall throughout the year with the highest recorded in May at 5" (127mm). Following closely is July with rainfall measurements up to 4.8" (122mm). The months receiving the least rainfall are September and October with amounts measuring up to 3.7 and 3" (76mm) respectively.

With regards to sunshine, the park is bathed with an ample amount of sunlight throughout the year. June presents the highest amount with daily sunshine hours reaching up to 10 hours. On the other hand, the park receives the least amount of sunshine in December and January with sunlight averaging around 4 hours a day.

The period from late April to August provides the most favorable time to travel to Mammoth Cave National Park. These months promise warm and pleasant temperature conditions, with averages ranging from 68°F (20°C) to 88°F (31.1°C), along with substantial daylight hours, from 13.2 hours to 14.7 hours, which allow for exploration. Rainfall is prominent during this period, particularly May and July with amounts measuring up to 5" (127mm) and 4.8" (122mm) respectively. However, the enhanced beauty that the rainfall brings to the parks flora is worth the wet conditions.

Trips to Mammoth Cave National Park can prove challenging during the winter months of December, January and February. These months witness the lowest temperatures throughout the year, with averages dropping between 23°F (-5°C) and 25°F (-3.9°C). Rainfall during this period is also substantial with averages of 4.2" (107mm) and 4.7" (119mm) in January and December respectively. Moreover, daylight hours are minimal, reducing the duration for outdoor activities.

Spring in Mammoth Cave National Park, from March to May, experiences a significant rise in temperature ranging from 57°F (13.9°C) to 77°F (25°C). Rainfalls during spring are among the highest throughout the year, specifically in May with an average of 5" (127mm). Daylight hours also see an increase during spring, with April enjoying 13.2 hours of daylight and May going up to 14.2 hours.

Summer stretches from June to August in Mammoth Cave National Park. Temperatures in July can soar up to 88°F (31.1°C), making it the hottest month. Despite being the peak of summer, August sees a slight dip with temperatures going down to 86°F (30°C). June registers ten hours of sunshine, the highest in the year. Rainfall in summer, specifically in July, measures up to 4.8" (122mm).

The Autumn months of September, October, and November witness a gradual decrease in temperatures, daylight hours, and the intensity of sunshine in Mammoth Cave National Park. With temperatures falling from 81°F (27.2°C) to 57°F (13.9°C) and daylight hours reducing from 12.4 hours to 10.2 hours, it is a mild transition between summer and winter.

Winter in Mammoth Cave National Park, lasting from December to February, experiences the coldest temperatures of the year. The lowest temperature, of 23°F (-5°C), is registered in January, with February witnessing a mild rise to 25°F (-3.9°C). Daylight hours in winter are the shortest with 9.6 hours in December gradually increasing to 10.8 hours in February. Despite the cold, the park receives a noticeable amount of sunshine, averaging 4 hours in December and January.

Prone to the gripping chill of winter, January flaunts the coldest temperatures of the year in Mammoth Cave National Park, Kentucky. The high to low temperature range settles between 41°F (5°C) and 23°F (-5°C), harboring a cold atmosphere. Weather in January »

February greets the year's early risers with slightly warmer temperatures, indicating a gradual shift from the harsh colds of January. Rainfall continues to be consistent, keeping the park moist and dewy. An uptick in daylight hours signals the approaching spring, favoring later sunsets and earlier sunrises. Weather in February »

March marks a significant leap in weather conditions: temperatures increase and the daylight hours extend further. The high temperature creeps up to 57°F (13.9°C), providing a warm yet fresh atmosphere within the park. Additionally, the UV index rises, mimicking an early summer vibe. Weather in March »

April witnesses a continuation of the warming atmosphere, signaling the heart of spring in Mammoth Cave National Park. Temperature fluctuations are more noticeable, encouraging a variety of plant and animal activity. Rainfall is still prevalent, providing nourishment for the thriving biodiversity within the park. Weather in April »

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. Weather in May »

June marks the start of summer in Mammoth Cave National Park, showcasing soaring temperature and lengthy daylight hours. It stands as one of the sunniest months, inviting visitors to seize the abundance of brightness in their outdoor adventures. Weather in June »

Entering July, Mammoth Cave National Park experiences its peak summer intensity. The high temperature reaches its zenith at 88°F (31.1°C), defining it as the hottest month. Coinciding with the scorching temperatures, the UV index also peaks. Weather in July »

August ushers in a minor respite from the extreme summer weather seen in July. While remaining considerably warm, temperature and UV index show slight declines. The extended daylight hours continue to contract gradually, hinting at the upcoming autumn season. Weather in August »

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. Weather in September »

October is embraced with an authentic autumn feel as temperatures continue to fall, reaching a high of around 70°F (21.1°C). The season brings an enticing palette of fall colors, set against shorter daylight hours. Rainfall continues to nourish the park, maintaining its vivid appeal despite the diminishing warmth. Weather in October »

November projects a sharp contrast to October as temperatures drop significantly, indicating the upcoming winter. Rainfall returns to the higher levels observed at the beginning of the year, contributing to the park's wintery ambiance. Weather in November »

Wrapping up the year, December reincorporates the coldest temperatures similar to those of January, with a high of 46°F (7.8°C). Paired with substantial rainfall and shorter daylight hours, a noticeable winter chill dominates the park. Weather in December »