Weather on August 21
Saint Petersburg, FL
55 Years of Data
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.
| 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" | — |
Saint Petersburg, FL Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Saint Petersburg, FL Monthly Precipitation
Average rainfall per month, in inches.
Saint Petersburg, FL Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Saint Petersburg, FL
Saint Petersburg, FL has no months that meet our "pleasant" threshold — every season has tradeoffs.