Mammoth Cave National Park weather in August
August in Mammoth Cave National Park: hot, rainy — a good time to visit.
#9 of 12 months in Mammoth Cave National Park · #428 of 604 destinations to visit in August · comfort 69/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Mammoth Cave National Park climate normals — August
| Daytime high | 30°C / 86°F | 🥵 hot |
|---|---|---|
| Nighttime low | 21°C / 70°F | |
| Feels like (high) | 33°C / 91°F | |
| Rainfall | 131 mm / 5.1 in | 🌧 rainy |
| Rainy days | 13 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 19°C / 67°F | |
| Sunshine | 10.7 h/day | |
| Daylight | 13.6 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 55 | 🙂 moderate |
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 August — FAQ
- Is August a good time to visit Mammoth Cave National Park?
- August in Mammoth Cave National Park: hot, rainy — a good time to visit. It ranks #9 of 12 months for Mammoth Cave National Park on SeasonMap's comfort score (69/100).
- What is the weather like in Mammoth Cave National Park in August?
- In August, Mammoth Cave National Park averages a daily high of 29.9°C and a low of 21°C, with about 130.7 mm of rain over roughly 13 rainy days.
- What is the air quality in Mammoth Cave National Park in August?
- Mammoth Cave National Park has a mean US Air Quality Index of about 55 in August.