Best time to visit Mammoth Cave National Park
The short answer
Best months to visit Mammoth Cave National Park: May and September. Daily highs run about 75–80°F, with about 60% of July's visitors.
Hardest months: December–February and July, mostly because of cold weather.
How we picked these months: each month is scored on daily highs (65–82°F is ideal), rain, snow and seasonal closures, then reduced by up to 30% for crowds, measured against the park's busiest month. We list the months within 15% of the top score (at most 5).
Weather and crowds by month
Mammoth Cave National Park month by month
Park-wide averages. Crowds compare each month with the park's busiest month: Quiet is under 35% of it, Moderate under 60%, Busy under 85%, Peak above that.
| Month | Rating | High / low | Rain | Snow | Crowds | Closures |
|---|---|---|---|---|---|---|
| January | Poor | 44° / 28°F | 3.6 in | 3.4 in | Quiet | – |
| February | Poor | 49° / 31°F | 5.7 in | 3.0 in | Quiet | – |
| March | Fair | 58° / 38°F | 5.0 in | 2.0 in | Moderate | – |
| April | Fair | 67° / 46°F | 5.4 in | – | Busy | – |
| May | Best | 76° / 57°F | 4.0 in | – | Busy | – |
| June | Fair | 85° / 65°F | 5.3 in | – | Busy | – |
| July | Poor | 87° / 70°F | 4.5 in | – | Peak | – |
| August | Fair | 86° / 68°F | 4.4 in | – | Busy | – |
| September | Best | 81° / 63°F | 3.1 in | – | Moderate | – |
| October | Good | 70° / 52°F | 4.2 in | – | Busy | – |
| November | Fair | 56° / 39°F | 3.4 in | 0.5 in | Moderate | – |
| December | Poor | 50° / 35°F | 4.3 in | – | Quiet | – |
Mammoth Cave National Park by season
Spring (March–May)
Spring (March–May) is a mixed time to visit Mammoth Cave National Park. Daily highs average 58–76°F and lows 38–57°F. Expect about 4.8 in of rain a month and little or no snow. Visitor numbers run 60–63% of the busiest month, which is busy by this park's standards.
Summer (June–August)
Summer (June–August) is a mixed time to visit Mammoth Cave National Park. Daily highs average 85–87°F and lows 65–70°F. Expect about 4.7 in of rain a month and little or no snow. Visitor numbers run 67–100% of the busiest month, which is busy by this park's standards.
Fall (September–November)
Fall (September–November) is a good time to visit Mammoth Cave National Park. Daily highs average 56–81°F and lows 39–63°F. Expect about 3.6 in of rain a month and little or no snow. Visitor numbers run 36–68% of the busiest month, which is moderate by this park's standards.
Winter (December–February)
Winter (December–February) is a difficult time to visit Mammoth Cave National Park. Daily highs average 44–50°F and lows 28–35°F. Expect about 4.5 in of rain a month and 2.3 in of snow, with up to 1 in on the ground. Visitor numbers run 15–25% of the busiest month, which is quiet by this park's standards.
For what to do in each season, see our guides to trip planning, fees and hours, trails, camping and things to do, where the planning page also has our written advice on when to go. In-depth topic guides cover individual places and hikes.
What the National Park Service says about the weather
Kentucky has a moderate climate with warm, yet moist conditions. Summers average in the high 80s; winters average in the low 40s. Southern Kentucky, where Mammoth Cave is located, receives the highest average precipitation for the state, about 50 inches per year, mostly in spring. Winter can bring mild to moderate snow and ice. Storms happen year-round, and can include tornadoes and flooding in low-lying areas, but severe weather is infrequent. The temperature deep in the cave is a constant 54°F (12°C).
Weather: modeled monthly averages for 2014-2023 (Open-Meteo Archive API), averaged over 1 location. Modeled grid cells can read cooler than weather stations in deep canyons and deserts, and warmer or colder at high elevation. Visits: monthly recreation visits for 2021-2024, National Park Service.
