Mammoth Cave National Park weather in April
April in Mammoth Cave National Park: nice, rainy, with clean air — one of the best months to visit.
#1 of 12 months in Mammoth Cave National Park · #104 of 604 destinations to visit in April · comfort 88/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Mammoth Cave National Park climate normals — April
| Daytime high | 19°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 48°F | |
| Feels like (high) | 18°C / 64°F | |
| Rainfall | 137 mm / 5.4 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 67% | 💧 humid |
| Dew point | 7°C / 44°F | |
| Sunshine | 9.3 h/day | |
| Daylight | 13.2 h | |
| Wind | 16 km/h / 10 mph | |
| Snowfall | 0.2 cm / 0.1 in | |
| Air quality (US AQI) | 41 | 🍃 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 April — FAQ
- Is April a good time to visit Mammoth Cave National Park?
- April in Mammoth Cave National Park: nice, rainy, with clean air — one of the best months to visit. It ranks #1 of 12 months for Mammoth Cave National Park on SeasonMap's comfort score (88/100).
- What is the weather like in Mammoth Cave National Park in April?
- In April, Mammoth Cave National Park averages a daily high of 19.2°C and a low of 8.7°C, with about 137.3 mm of rain over roughly 10.8 rainy days.
- What is the air quality in Mammoth Cave National Park in April?
- Mammoth Cave National Park has a mean US Air Quality Index of about 41 in April.