Weather on October 21 at Mammoth Cave
Mammoth Cave National Park
Based on 55 years of data from Bowling Green, KY
Planning Your Visit
October 21st in Mammoth Cave National Park (via Bowling Green, KY) typically brings pleasant fall weather, with average highs around 70°F and lows near 44°F — a 26°F daily swing. Over 55 years of records, the warmest October 21st was in 1979 (76°F average), while the coldest was 1987 (39°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 24% of October 21st dates historically, with the wettest October 21st recording 1.68" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for October 21st in Mammoth Cave? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 73°F | 51°F | 0" | 0" |
| 2024 | 78°F | 40°F | 0" | 0" |
| 2023 | 80°F | 43°F | 0" | 0" |
| 2022 | 75°F | 33°F | 0" | -- |
| 2021 | 77°F | 49°F | 0.03" | 0" |
| 2020 | 83°F | 55°F | 0" | 0" |
| 2019 | 72°F | 56°F | 0.2" | 0" |
| 2018 | 56°F | 33°F | 0" | 0" |
| 2017 | 76°F | 45°F | 0" | 0" |
| 2016 | 62°F | 45°F | 0.05" | 0" |
| 2015 | 78°F | 42°F | 0" | 0" |
| 2014 | 69°F | 42°F | 0" | 0" |
| 2013 | 70°F | 35°F | 0" | 0" |
| 2012 | 76°F | 41°F | 0" | 0" |
| 2011 | 63°F | 37°F | 0" | 0" |
| 2010 | 75°F | 43°F | 0" | 0" |
| 2009 | 70°F | 37°F | 0" | 0" |
| 2008 | 66°F | 42°F | 0" | 0" |
| 2007 | 82°F | 47°F | 0" | 0" |
| 2006 | 64°F | 32°F | 0" | 0" |
| 2005 | 71°F | 52°F | 0.1" | 0" |
| 2004 | 69°F | 56°F | 0" | 0" |
| 2003 | 79°F | 57°F | 0" | 0" |
| 2002 | 66°F | 46°F | 0" | 0" |
| 2001 | 77°F | 42°F | 0" | 0" |
| 2000 | 70°F | 56°F | 0.18" | 0" |
| 1999 | 67°F | 33°F | 0" | 0" |
| 1998 | 70°F | 46°F | 0" | 0" |
| 1997 | 57°F | 39°F | -- | 0" |
| 1996 | 73°F | 48°F | -- | 0" |
| 1995 | 58°F | 42°F | 0.05" | 0" |
| 1994 | 75°F | 44°F | 0" | 0" |
| 1993 | 68°F | 39°F | 0.3" | 0" |
| 1992 | 69°F | 49°F | 0" | 0" |
| 1991 | 74°F | 37°F | 0" | 0" |
| 1990 | 77°F | 43°F | 0.23" | 0" |
| 1989 | 69°F | 37°F | 0" | 0" |
| 1988 | 52°F | 47°F | 0.33" | 0" |
| 1987 | 51°F | 27°F | 0" | 0" |
| 1986 | 73°F | 41°F | 0" | 0" |
| 1985 | 63°F | 57°F | 0.03" | 0" |
| 1984 | 70°F | 59°F | 1.68" | 0" |
| 1983 | 67°F | 63°F | 0.61" | 0" |
| 1982 | 57°F | 31°F | 0" | 0" |
| 1981 | 70°F | 44°F | 0" | 0" |
| 1980 | 73°F | 44°F | 0" | 0" |
| 1979 | 86°F | 67°F | 0" | 0" |
| 1978 | 79°F | 40°F | 0" | 0" |
| 1977 | 74°F | 39°F | 0" | 0" |
| 1976 | 56°F | 33°F | 0" | 0" |
| 1975 | 77°F | 48°F | 0" | 0" |
| 1974 | 57°F | 27°F | 0" | 0" |
| 1973 | 74°F | 39°F | 0" | 0" |
| 1972 | 65°F | 39°F | 0" | 0" |
| 1971 | 67°F | 61°F | 0.56" | 0" |