Weather on May 21 at Mammoth Cave
Mammoth Cave National Park
Based on 56 years of data from Bowling Green, KY
Planning Your Visit
May 21st in Mammoth Cave National Park (via Bowling Green, KY) typically brings pleasant spring weather, with average highs around 79°F and lows near 57°F. Over 56 years of records, the warmest May 21st was in 2022 (80°F average), while the coldest was 2002 (50°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 36% of May 21st dates historically, with the wettest May 21st recording 5.05" of rain. The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in Mammoth Cave? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 68°F | 61°F | 0.71" | 0" |
| 2025 | 77°F | 60°F | 0" | 0" |
| 2024 | 89°F | 68°F | 0" | 0" |
| 2023 | 77°F | 51°F | 0" | 0" |
| 2022 | 91°F | 68°F | 0.15" | -- |
| 2021 | 86°F | 57°F | 0" | 0" |
| 2020 | 70°F | 56°F | 0.84" | 0" |
| 2019 | 89°F | 58°F | 0" | 0" |
| 2018 | 86°F | 67°F | 1.32" | 0" |
| 2017 | 83°F | 65°F | 0.18" | 0" |
| 2016 | 64°F | 51°F | 0" | 0" |
| 2015 | 60°F | 46°F | 0" | 0" |
| 2014 | 84°F | 61°F | 0" | 0" |
| 2013 | 85°F | 66°F | 0.66" | 0" |
| 2012 | 82°F | 64°F | 0.18" | 0" |
| 2011 | 88°F | 60°F | 0.03" | 0" |
| 2010 | 78°F | 57°F | 0.03" | 0" |
| 2009 | 84°F | 53°F | 0" | 0" |
| 2008 | 74°F | 50°F | 0" | 0" |
| 2007 | 83°F | 47°F | 0" | 0" |
| 2006 | 78°F | 52°F | 0" | 0" |
| 2005 | 74°F | 59°F | 0" | 0" |
| 2004 | 87°F | 71°F | 0" | 0" |
| 2003 | 61°F | 54°F | 0.25" | 0" |
| 2002 | 61°F | 40°F | 0" | 0" |
| 2001 | 79°F | 60°F | 4.6" | 0" |
| 2000 | 71°F | 51°F | 0" | 0" |
| 1999 | 85°F | 53°F | 0" | 0" |
| 1998 | 85°F | 64°F | 0.94" | 0" |
| 1997 | 67°F | 48°F | -- | 0" |
| 1996 | 85°F | 66°F | 0" | 0" |
| 1995 | 73°F | 50°F | 0" | 0" |
| 1994 | 78°F | 47°F | 0" | 0" |
| 1993 | 66°F | 46°F | 0.03" | 0" |
| 1992 | 82°F | 63°F | 0" | 0" |
| 1991 | 85°F | 64°F | 0.18" | 0" |
| 1990 | 79°F | 57°F | 0.2" | 0" |
| 1989 | 81°F | 59°F | 0" | 0" |
| 1988 | 86°F | 52°F | 0" | 0" |
| 1987 | 85°F | 64°F | 5.05" | 0" |
| 1986 | 66°F | 41°F | 0" | 0" |
| 1985 | 83°F | 59°F | 0" | 0" |
| 1984 | 84°F | 67°F | 0" | 0" |
| 1983 | 76°F | 60°F | 1.17" | 0" |
| 1982 | 84°F | 64°F | 0.91" | 0" |
| 1981 | 74°F | 42°F | 0" | 0" |
| 1980 | 84°F | 57°F | 0" | 0" |
| 1979 | 74°F | 62°F | 0.03" | 0" |
| 1978 | 81°F | 63°F | 0" | 0" |
| 1977 | 89°F | 62°F | 0" | 0" |
| 1976 | 83°F | 50°F | 0" | 0" |
| 1975 | 88°F | 69°F | 0" | 0" |
| 1974 | 90°F | 68°F | 4.52" | 0" |
| 1973 | 78°F | 45°F | 0" | 0" |
| 1972 | 85°F | 56°F | 0" | 0" |
| 1971 | 77°F | 50°F | 0" | 0" |