Mammoth Cave National Park in December
In December, Mammoth Cave National Park averages a high of 51°F and a low of 33°F, with 4.8 inches of precipitation (rain plus melted snow) and 1.3 inches of snowfall. About 35,000 people visit, the 9th busiest of 12 (moderate). Days are 9 hours 37 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 51° / 33°F
- Precipitation
- 4.8in
- Snow
- 1.3in
- Daylight
- 9h 37m
- Visitors
- 35,000
- Crowds
- Moderate
Best months for weather and crowds instead: October (moderate) and November (moderate).
Weather 1991–2020 averages at Mammoth Cave, KY, 4.2 miles from the park's center, 760 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in December
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Great Smoky Mountains National Park | 50° / 29° | Moderate | Cool |
| Kennesaw Mountain National Battlefield Park | 55° / 35° | Moderate | Mild, wet |
| Gateway Arch National Park | 44° / 29° | Quiet | Cool |
| Chattahoochee River National Recreation Area | 54° / 36° | Moderate | Cool |
| New River Gorge National Park and Preserve | 45° / 27° | Quiet | Cool |
Closures, reservations and alerts: Mammoth Cave National Park on nps.gov
All twelve months at Mammoth Cave · National parks to visit in December