Great Smoky Mountains National Park weather in December
December in Great Smoky Mountains National Park: cold, rainy, with clean air — a good time to visit.
#10 of 12 months in Great Smoky Mountains National Park · #306 of 604 destinations to visit in December · comfort 69/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Great Smoky Mountains National Park climate normals — December
| Daytime high | 10°C / 50°F | 🧥 cold |
|---|---|---|
| Nighttime low | 1°C / 33°F | |
| Feels like (high) | 7°C / 45°F | |
| Rainfall | 129 mm / 5.1 in | 🌧 rainy |
| Rainy days | 13 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | -1°C / 31°F | |
| Sunshine | 5.8 h/day | |
| Daylight | 9.8 h | |
| Wind | 11 km/h / 7 mph | |
| Snowfall | 6.6 cm / 2.6 in | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Great Smoky Mountains National Park in December — FAQ
- Is December a good time to visit Great Smoky Mountains National Park?
- December in Great Smoky Mountains National Park: cold, rainy, with clean air — a good time to visit. It ranks #10 of 12 months for Great Smoky Mountains National Park on SeasonMap's comfort score (69/100).
- What is the weather like in Great Smoky Mountains National Park in December?
- In December, Great Smoky Mountains National Park averages a daily high of 9.8°C and a low of 0.7°C, with about 129.1 mm of rain over roughly 12.6 rainy days.
- What is the air quality in Great Smoky Mountains National Park in December?
- Great Smoky Mountains National Park has a mean US Air Quality Index of about 31 in December.
- Does it snow in Great Smoky Mountains National Park in December?
- Great Smoky Mountains National Park sees roughly 6.6 cm of snowfall in December.