Weather on August 21
Saint Petersburg, FL
55 Years of Data
Avg High
90°F
Avg Low
78°F
Warmest
2021
89°F avg
Coldest
1972
80°F avg
About This Date
August 21st in Saint Petersburg, FL typically brings hot summer weather, with average highs around 90°F and lows near 78°F. Over 54 years of records, the warmest August 21st was in 2021 (89°F average), while the coldest was 1972 (80°F) — a 9°F range across recorded history. Rain or other precipitation has occurred on about 48% of August 21st dates historically, with the wettest August 21st recording 6.76" of rain. The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Saint Petersburg, FL? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 92° | 77° | 84° | — | — |
| 2024 | 91° | 79° | 85° | — | — |
| 2023 | 93° | 82° | 88° | — | — |
| 2022 | 95° | 80° | 88° | 0.08" | — |
| 2021warmest | 93° | 84° | 89° | — | — |
| 2020 | 89° | 77° | 83° | 0.2" | — |
| 2019 | 93° | 80° | 87° | — | — |
| 2018 | 90° | 79° | 84° | — | — |
| 2017 | 93° | 81° | 87° | — | — |
| 2016 | 86° | 78° | 82° | — | — |
| 2015 | 93° | 81° | 87° | — | — |
| 2014 | 93° | 80° | 87° | — | — |
| 2013 | 92° | 77° | 84° | 0.38" | — |
| 2012 | 90° | 74° | 82° | 6.6" | — |
| 2011 | 92° | 78° | 85° | 1.24" | — |
| 2010 | 91° | 81° | 86° | 0.23" | — |
| 2009 | 90° | 79° | 84° | 0.38" | — |
| 2008 | 86° | 81° | 83° | 0.05" | — |
| 2007 | 94° | 81° | 87° | — | — |
| 2006 | 90° | 78° | 84° | — | — |
| 2005 | 93° | 81° | 87° | — | — |
| 2004 | 89° | 76° | 82° | 1.68" | — |
| 2003 | 85° | 76° | 80° | 0.89" | — |
| 2002 | 90° | 76° | 83° | 0.3" | — |
| 2001 | 89° | 77° | 83° | 5.92" | — |
| 2000 | 93° | 80° | 87° | — | — |
| 1999 | 88° | 75° | 81° | 2.31" | — |
| 1998 | 89° | 77° | 83° | — | — |
| 1997 | 90° | 80° | 85° | 0.23" | — |
| 1996 | 88° | 75° | 81° | — | — |
| 1995 | 90° | 75° | 82° | — | — |
| 1994 | 89° | 78° | 84° | — | — |
| 1993 | 90° | 80° | 85° | — | — |
| 1992 | 92° | 77° | 84° | 0.18" | — |
| 1991 | 89° | 75° | 82° | 3.3" | — |
| 1990 | 90° | 78° | 84° | — | — |
| 1989 | 91° | 77° | 84° | 0.05" | — |
| 1988 | 94° | 80° | 87° | — | — |
| 1987 | 93° | 76° | 84° | 0.74" | — |
| 1986 | 87° | 74° | 80° | 0.1" | — |
| 1984 | 86° | 73° | 80° | 3.35" | — |
| 1983 | 92° | 80° | 86° | — | — |
| 1982 | 89° | 77° | 83° | — | — |
| 1981 | 88° | 73° | 80° | 6.76" | — |
| 1980 | 92° | 80° | 86° | — | — |
| 1979 | 91° | 76° | 83° | 0.03" | — |
| 1978 | 92° | 79° | 85° | — | — |
| 1977 | 86° | 79° | 82° | 0.03" | — |
| 1976 | 89° | 77° | 83° | — | — |
| 1975 | 91° | 75° | 83° | — | — |
| 1974 | 89° | 76° | 82° | — | — |
| 1973 | 90° | 72° | 81° | 1.24" | — |
| 1972coldest | 88° | 72° | 80° | 0.56" | — |
| 1971 | 93° | 78° | 86° | 0.25" | — |
54 years of data from ST PETERSBURG ALBERT WHITTED A