Weather on December 21
Austin, TX
55 Years of Data
Avg High
63°F
Avg Low
40°F
Warmest
1984
69°F avg
Coldest
1983
29°F avg
About This Date
December 21st in Austin, TX typically brings mild winter weather, with average highs around 63°F and lows near 40°F. Over 55 years of records, the warmest December 21st was in 1984 (69°F average), while the coldest was 1983 (29°F) — a 40°F range across recorded history. Rain or other precipitation has occurred on about 16% of December 21st dates historically, with the wettest December 21st recording 6.58" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for December 21st in Austin, TX? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 50° | 62° | — | — |
| 2024 | 63° | 36° | 49° | — | — |
| 2023 | 62° | 59° | 61° | 0.46" | — |
| 2022 | 49° | 39° | 44° | — | — |
| 2021 | 68° | 38° | 53° | — | — |
| 2020 | 75° | 40° | 57° | — | — |
| 2019 | 62° | 41° | 52° | — | — |
| 2018 | 58° | 37° | 47° | — | — |
| 2017 | 73° | 41° | 57° | — | — |
| 2016 | 51° | 33° | 42° | — | — |
| 2015 | 76° | 54° | 65° | — | — |
| 2014 | 56° | 50° | 53° | — | — |
| 2013 | 73° | 44° | 59° | — | — |
| 2012 | 56° | 29° | 42° | — | — |
| 2011 | 59° | 42° | 51° | — | — |
| 2010 | 76° | 56° | 66° | — | — |
| 2009 | 63° | 31° | 47° | — | — |
| 2008 | 78° | 37° | 58° | — | — |
| 2007 | 74° | 37° | 55° | — | — |
| 2006 | 67° | 42° | 54° | 0.05" | — |
| 2005 | 53° | 37° | 45° | — | — |
| 2004 | 70° | 42° | 56° | — | — |
| 2003 | 74° | 44° | 59° | — | — |
| 2002 | 73° | 43° | 58° | — | — |
| 2001 | 69° | 38° | 53° | — | — |
| 2000 | 52° | 35° | 43° | — | — |
| 1999 | 46° | 34° | 40° | 0.03" | — |
| 1998 | 77° | 32° | 55° | — | — |
| 1997 | 69° | 43° | 56° | — | — |
| 1996 | 65° | 41° | 53° | — | — |
| 1995 | 44° | 35° | 40° | — | — |
| 1994 | 72° | 43° | 57° | — | — |
| 1993 | 51° | 35° | 43° | 0.84" | — |
| 1992 | 56° | 42° | 49° | — | — |
| 1991 | 59° | 49° | 54° | 6.58" | — |
| 1990 | 72° | 22° | 47° | — | — |
| 1989 | 41° | 23° | 32° | — | — |
| 1988 | 76° | 56° | 66° | — | — |
| 1987 | 60° | 45° | 52° | 0.18" | — |
| 1986 | 54° | 45° | 49° | 0.43" | — |
| 1985 | 66° | 37° | 52° | — | — |
| 1984warmest | 79° | 59° | 69° | — | — |
| 1983coldest | 36° | 23° | 29° | 0.03" | — |
| 1982 | 73° | 47° | 60° | — | — |
| 1981 | 76° | 55° | 65° | — | — |
| 1980 | 39° | 32° | 36° | — | — |
| 1979 | 67° | 60° | 63° | 0.05" | — |
| 1978 | 59° | 39° | 49° | — | — |
| 1977 | 53° | 30° | 42° | — | — |
| 1976 | 43° | 28° | 35° | — | — |
| 1975 | 54° | 33° | 43° | — | — |
| 1974 | 74° | 34° | 54° | — | — |
| 1973 | 57° | 22° | 39° | — | — |
| 1972 | 62° | 44° | 53° | — | — |
| 1971 | 71° | 43° | 57° | — | — |
55 years of data from AUSTIN 6S