Mammoth Cave National Park weather in December
December in Mammoth Cave National Park: cold, rainy, with clean air — a great time to visit.
#8 of 12 months in Mammoth Cave National Park · #267 of 604 destinations to visit in December · comfort 72/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Mammoth Cave National Park climate normals — December
| Daytime high | 11°C / 52°F | 🧥 cold |
|---|---|---|
| Nighttime low | 3°C / 37°F | |
| Feels like (high) | 8°C / 46°F | |
| Rainfall | 117 mm / 4.6 in | 🌧 rainy |
| Rainy days | 10 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 0°C / 33°F | |
| Sunshine | 5.7 h/day | |
| Daylight | 9.6 h | |
| Wind | 16 km/h / 10 mph | |
| Snowfall | 1 cm / 0.4 in | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Mammoth Cave National Park in December — FAQ
- Is December a good time to visit Mammoth Cave National Park?
- December in Mammoth Cave National Park: cold, rainy, with clean air — a great time to visit. It ranks #8 of 12 months for Mammoth Cave National Park on SeasonMap's comfort score (72/100).
- What is the weather like in Mammoth Cave National Park in December?
- In December, Mammoth Cave National Park averages a daily high of 10.9°C and a low of 2.9°C, with about 116.6 mm of rain over roughly 10 rainy days.
- What is the air quality in Mammoth Cave National Park in December?
- Mammoth Cave National Park has a mean US Air Quality Index of about 30 in December.
- Does it snow in Mammoth Cave National Park in December?
- Mammoth Cave National Park sees roughly 1 cm of snowfall in December.