Weather on July 21 at Mammoth Cave
Mammoth Cave National Park
Based on 55 years of data from Bowling Green, KY
Planning Your Visit
July 21st in Mammoth Cave National Park (via Bowling Green, KY) typically brings hot summer weather, with average highs around 90°F and lows near 70°F. Over 55 years of records, the warmest July 21st was in 1983 (89°F average), while the coldest was 1971 (70°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 31% of July 21st dates historically, with the wettest July 21st recording 5.99" of rain. The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for July 21st in Mammoth Cave? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 92°F | 74°F | 1.12" | 0" |
| 2024 | 89°F | 72°F | 0" | 0" |
| 2023 | 85°F | 73°F | 0" | 0" |
| 2022 | 92°F | 73°F | 0.99" | -- |
| 2021 | 89°F | 68°F | 0" | 0" |
| 2020 | 95°F | 72°F | 2.16" | 0" |
| 2019 | 88°F | 72°F | 0" | 0" |
| 2018 | 87°F | 68°F | 3.76" | 0" |
| 2017 | 96°F | 76°F | 0" | 0" |
| 2016 | 94°F | 71°F | 0" | 0" |
| 2015 | 89°F | 73°F | 0.61" | 0" |
| 2014 | 91°F | 65°F | 0" | 0" |
| 2013 | 85°F | 70°F | 2.74" | 0" |
| 2012 | 89°F | 73°F | 0" | 0" |
| 2011 | 97°F | 73°F | 0.66" | 0" |
| 2010 | 85°F | 73°F | 1.24" | 0" |
| 2009 | 82°F | 57°F | 0.05" | 0" |
| 2008 | 97°F | 76°F | 0" | 0" |
| 2007 | 82°F | 61°F | 0" | 0" |
| 2006 | 93°F | 71°F | 1.96" | 0" |
| 2005 | 93°F | 75°F | 0" | 0" |
| 2004 | 89°F | 65°F | 0" | 0" |
| 2003 | 79°F | 69°F | 3.73" | 0" |
| 2002 | 92°F | 72°F | 0" | 0" |
| 2001 | 88°F | 70°F | 0" | 0" |
| 2000 | 84°F | 63°F | 0" | 0" |
| 1999 | 94°F | 76°F | 0.03" | 0" |
| 1998 | 92°F | 72°F | 0" | 0" |
| 1997 | 92°F | 72°F | -- | 0" |
| 1996 | 92°F | 73°F | -- | 0" |
| 1995 | 92°F | 73°F | 0" | 0" |
| 1994 | 93°F | 72°F | 0" | 0" |
| 1993 | 93°F | 71°F | 0" | 0" |
| 1992 | 91°F | 68°F | 0.86" | 0" |
| 1991 | 96°F | 70°F | 0" | 0" |
| 1990 | 88°F | 70°F | 0.64" | 0" |
| 1989 | 87°F | 64°F | 0.38" | 0" |
| 1988 | 82°F | 70°F | 0" | 0" |
| 1987 | 91°F | 67°F | 0" | 0" |
| 1986 | 93°F | 71°F | 0" | 0" |
| 1985 | 92°F | 71°F | 0" | 0" |
| 1984 | 88°F | 66°F | 0" | 0" |
| 1983 | 102°F | 76°F | 0" | 0" |
| 1982 | 89°F | 72°F | 0" | 0" |
| 1981 | 86°F | 67°F | 0" | 0" |
| 1980 | 97°F | 71°F | 1.78" | 0" |
| 1979 | 88°F | 68°F | 5.99" | 0" |
| 1978 | 96°F | 75°F | 0" | 0" |
| 1977 | 98°F | 73°F | 0" | 0" |
| 1976 | 92°F | 65°F | 0" | 0" |
| 1975 | 91°F | 70°F | 0" | 0" |
| 1974 | 88°F | 64°F | 0" | 0" |
| 1973 | 93°F | 73°F | 0" | 0" |
| 1972 | 97°F | 71°F | 0" | 0" |
| 1971 | 81°F | 60°F | 0" | 0" |