Weather on August 21
Jacksonville, FL
55 Years of Data
Avg High
91°F
Avg Low
73°F
Warmest
1980
86°F avg
Coldest
2012
75°F avg
About This Date
August 21st in Jacksonville, FL typically brings hot summer weather, with average highs around 91°F and lows near 73°F. Over 55 years of records, the warmest August 21st was in 1980 (86°F average), while the coldest was 2012 (75°F) — a 11°F range across recorded history. Rain or other precipitation has occurred on about 53% of August 21st dates historically, with the wettest August 21st recording 7.59" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Jacksonville, FL? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 74° | 84° | 0.13" | — |
| 2024 | 90° | 74° | 82° | 0.36" | — |
| 2023 | 92° | 75° | 83° | — | — |
| 2022 | 92° | 73° | 82° | 0.18" | — |
| 2021 | 93° | 73° | 83° | — | — |
| 2020 | 88° | 71° | 79° | — | — |
| 2019 | 93° | 73° | 83° | — | — |
| 2018 | 90° | 74° | 82° | 0.2" | — |
| 2017 | 87° | 75° | 81° | 1.37" | — |
| 2016 | 97° | 73° | 85° | — | — |
| 2015 | 94° | 73° | 83° | 0.05" | — |
| 2014 | 97° | 73° | 85° | — | — |
| 2013 | 87° | 74° | 80° | 0.79" | — |
| 2012coldest | 78° | 71° | 75° | 0.89" | — |
| 2011 | 93° | 73° | 83° | 0.05" | — |
| 2010 | 96° | 75° | 86° | 6.4" | — |
| 2009 | 91° | 74° | 82° | 1.19" | — |
| 2008 | 79° | 75° | 77° | 7.59" | — |
| 2007 | 93° | 72° | 82° | — | — |
| 2006 | 95° | 73° | 84° | — | — |
| 2005 | 95° | 75° | 85° | — | — |
| 2004 | 89° | 73° | 81° | 0.18" | — |
| 2003 | 87° | 72° | 79° | 0.33" | — |
| 2002 | 90° | 72° | 81° | — | — |
| 2001 | 93° | 72° | 82° | — | — |
| 2000 | 86° | 76° | 81° | — | — |
| 1999 | 93° | 72° | 82° | — | — |
| 1998 | 88° | 76° | 82° | 0.76" | — |
| 1997 | 87° | 73° | 80° | 0.41" | — |
| 1996 | 87° | 69° | 78° | 0.05" | — |
| 1995 | 86° | 70° | 78° | — | — |
| 1994 | 93° | 72° | 82° | — | — |
| 1993 | 95° | 74° | 84° | — | — |
| 1992 | 92° | 72° | 82° | 1.3" | — |
| 1991 | 92° | 70° | 81° | — | — |
| 1990 | 96° | 72° | 84° | — | — |
| 1989 | 91° | 76° | 83° | 0.58" | — |
| 1988 | 95° | 75° | 85° | 0.08" | — |
| 1987 | 90° | 72° | 81° | — | — |
| 1986 | 92° | 71° | 81° | 0.15" | — |
| 1985 | 90° | 74° | 82° | — | — |
| 1984 | 85° | 69° | 77° | 0.03" | — |
| 1983 | 97° | 76° | 86° | — | — |
| 1982 | 91° | 71° | 81° | 0.3" | — |
| 1981 | 82° | 73° | 78° | 0.08" | — |
| 1980warmest | 97° | 75° | 86° | — | — |
| 1979 | 94° | 71° | 82° | — | — |
| 1978 | 90° | 72° | 81° | — | — |
| 1977 | 86° | 75° | 81° | 5.51" | — |
| 1976 | 87° | 66° | 77° | — | — |
| 1975 | 89° | 71° | 80° | 0.03" | — |
| 1974 | 85° | 70° | 77° | 0.41" | — |
| 1973 | 93° | 68° | 81° | 2.39" | — |
| 1972 | 85° | 69° | 77° | 0.46" | — |
| 1971 | 93° | 73° | 83° | — | — |
55 years of data from JACKSONVILLE