Weather on December 21
Port Saint Lucie, FL
55 Years of Data
Avg High
74°F
Avg Low
58°F
Warmest
1990
75°F avg
Coldest
1996
43°F avg
About This Date
December 21st in Port Saint Lucie, FL typically brings pleasant winter weather, with average highs around 74°F and lows near 58°F. Over 55 years of records, the warmest December 21st was in 1990 (75°F average), while the coldest was 1996 (43°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 24% of December 21st dates historically, with the wettest December 21st recording 9.4" of rain. The last decade has been 10.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 10.3°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Port Saint Lucie, FL? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 64° | 71° | — | — |
| 2024 | 75° | 54° | 64° | — | — |
| 2023 | 70° | 58° | 64° | — | — |
| 2022 | 74° | 67° | 70° | 0.89" | — |
| 2021 | 78° | 70° | 74° | 1.27" | — |
| 2020 | 79° | 49° | 64° | 0.23" | — |
| 2019 | 73° | 66° | 70° | 0.38" | — |
| 2018 | 83° | 62° | 72° | 0.91" | — |
| 2017 | 81° | 65° | 73° | — | — |
| 2016 | 79° | 64° | 71° | — | — |
| 2015 | 78° | 71° | 75° | — | — |
| 2014 | 78° | 68° | 73° | — | — |
| 2013 | 77° | 73° | 75° | — | — |
| 2012 | 77° | 59° | 68° | — | — |
| 2011 | 74° | 68° | 71° | — | — |
| 2010 | 62° | 43° | 52° | — | — |
| 2009 | 60° | 45° | 52° | — | — |
| 2008 | 78° | 58° | 68° | — | — |
| 2007 | 76° | 65° | 70° | — | — |
| 2006 | 78° | 72° | 75° | — | — |
| 2005 | 68° | 58° | 63° | 0.08" | — |
| 2004 | 70° | 48° | 59° | — | — |
| 2003 | 58° | 37° | 47° | — | — |
| 2002 | 48° | 47° | 47° | — | — |
| 2001 | 71° | 50° | 61° | — | — |
| 2000 | 69° | 48° | 59° | — | — |
| 1999 | 77° | 65° | 71° | — | — |
| 1998 | 82° | 60° | 71° | — | — |
| 1997 | 78° | 59° | 69° | — | — |
| 1996coldest | 49° | 38° | 43° | 0.05" | — |
| 1995 | 67° | 44° | 55° | — | — |
| 1994 | 77° | 62° | 70° | 9.4" | — |
| 1993 | 78° | 66° | 72° | — | — |
| 1992 | 84° | 67° | 75° | — | — |
| 1991 | 77° | 66° | 72° | — | — |
| 1990warmest | 78° | 72° | 75° | — | — |
| 1989 | 70° | 54° | 62° | — | — |
| 1988 | 79° | 66° | 72° | 0.08" | — |
| 1987 | 78° | 62° | 70° | — | — |
| 1986 | 81° | 60° | 70° | — | — |
| 1985 | 68° | 47° | 57° | — | — |
| 1984 | 75° | 58° | 66° | 0.2" | — |
| 1983 | 80° | 65° | 72° | 0.05" | — |
| 1982 | 72° | 41° | 56° | — | — |
| 1981 | 66° | 39° | 53° | — | — |
| 1980 | 75° | 55° | 65° | — | — |
| 1979 | 75° | 56° | 65° | — | — |
| 1978 | 82° | 62° | 72° | — | — |
| 1977 | 78° | 55° | 67° | — | — |
| 1976 | 76° | 54° | 65° | — | — |
| 1975 | 64° | 46° | 55° | 0.53" | — |
| 1974 | 75° | 62° | 69° | 0.08" | — |
| 1973 | 67° | 50° | 58° | — | — |
| 1972 | 80° | 61° | 70° | — | — |
| 1971 | 86° | 61° | 73° | — | — |
55 years of data from NETTLES IS