Great Smoky Mountains National Park weather in May
May in Great Smoky Mountains National Park: nice, rainy, with clean air — one of the best months to visit.
#1 of 12 months in Great Smoky Mountains National Park · #59 of 604 destinations to visit in May · comfort 91/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Great Smoky Mountains National Park climate normals — May
| Daytime high | 20°C / 68°F | 😎 nice |
|---|---|---|
| Nighttime low | 10°C / 51°F | |
| Feels like (high) | 20°C / 68°F | |
| Rainfall | 139 mm / 5.5 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 11°C / 51°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 14.1 h | |
| Wind | 12 km/h / 7 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Great Smoky Mountains National Park?
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Great Smoky Mountains National Park in May — FAQ
- Is May a good time to visit Great Smoky Mountains National Park?
- May in Great Smoky Mountains National Park: nice, rainy, with clean air — one of the best months to visit. It ranks #1 of 12 months for Great Smoky Mountains National Park on SeasonMap's comfort score (91/100).
- What is the weather like in Great Smoky Mountains National Park in May?
- In May, Great Smoky Mountains National Park averages a daily high of 20°C and a low of 10.3°C, with about 139 mm of rain over roughly 13.8 rainy days.
- What is the air quality in Great Smoky Mountains National Park in May?
- Great Smoky Mountains National Park has a mean US Air Quality Index of about 42 in May.