Mammoth Cave National Park weather in May
May in Mammoth Cave National Park: warm, rainy, with clean air — an excellent time to visit.
#3 of 12 months in Mammoth Cave National Park · #201 of 604 destinations to visit in May · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Mammoth Cave National Park climate normals — May
| Daytime high | 24°C / 76°F | 🌤 warm |
|---|---|---|
| Nighttime low | 15°C / 58°F | |
| Feels like (high) | 25°C / 77°F | |
| Rainfall | 100 mm / 3.9 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 69% | 💧 humid |
| Dew point | 13°C / 56°F | |
| Sunshine | 10.2 h/day | |
| Daylight | 14.2 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 47 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Mammoth Cave National Park?
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Mammoth Cave National Park in May — FAQ
- Is May a good time to visit Mammoth Cave National Park?
- May in Mammoth Cave National Park: warm, rainy, with clean air — an excellent time to visit. It ranks #3 of 12 months for Mammoth Cave National Park on SeasonMap's comfort score (85/100).
- What is the weather like in Mammoth Cave National Park in May?
- In May, Mammoth Cave National Park averages a daily high of 24.4°C and a low of 14.7°C, with about 99.5 mm of rain over roughly 11.8 rainy days.
- What is the air quality in Mammoth Cave National Park in May?
- Mammoth Cave National Park has a mean US Air Quality Index of about 47 in May.