Weather on December 31
San Antonio, TX
55 Years of Data
Avg High
64°F
Avg Low
41°F
Warmest
2021
74°F avg
Coldest
1983
31°F avg
About This Date
December 31st in San Antonio, TX typically brings mild winter weather, with average highs around 64°F and lows near 41°F. Over 55 years of records, the warmest December 31st was in 2021 (74°F average), while the coldest was 1983 (31°F) — a 43°F range across recorded history. Rain or other precipitation has occurred on about 29% of December 31st dates historically, with the wettest December 31st recording 3.73" 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 December 31st in San Antonio, TX? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 69° | 35° | 52° | — | — |
| 2024 | 72° | 50° | 61° | — | — |
| 2023 | 70° | 31° | 50° | — | — |
| 2022 | 77° | 43° | 60° | — | — |
| 2021warmest | 82° | 66° | 74° | 3.73" | — |
| 2020 | 72° | 44° | 58° | — | — |
| 2019 | 61° | 33° | 47° | — | — |
| 2018 | 43° | 40° | 41° | 0.48" | — |
| 2017 | 65° | 48° | 56° | — | — |
| 2016 | 73° | 52° | 62° | 0.05" | — |
| 2015 | 57° | 43° | 50° | — | — |
| 2014 | 42° | 37° | 40° | — | — |
| 2013 | 44° | 36° | 40° | — | — |
| 2012 | 54° | 36° | 45° | 0.36" | — |
| 2011 | 76° | 40° | 58° | — | — |
| 2010 | 78° | 58° | 68° | 0.03" | — |
| 2009 | 60° | 39° | 50° | — | — |
| 2008 | 74° | 36° | 55° | — | — |
| 2007 | 71° | 35° | 53° | — | — |
| 2006 | 61° | 38° | 49° | — | — |
| 2005 | 77° | 38° | 57° | — | — |
| 2004 | 70° | 61° | 65° | — | — |
| 2003 | 62° | 27° | 44° | — | — |
| 2002 | 75° | 49° | 62° | 0.61" | — |
| 2001 | 49° | 33° | 41° | — | — |
| 2000 | 52° | 28° | 40° | — | — |
| 1999 | 77° | 40° | 58° | — | — |
| 1998 | 66° | 39° | 53° | — | — |
| 1997 | 68° | 34° | 51° | — | — |
| 1996 | 69° | 61° | 65° | 0.71" | — |
| 1995 | 76° | 45° | 60° | — | — |
| 1994 | 72° | 45° | 58° | 0.05" | — |
| 1993 | 61° | 44° | 52° | — | — |
| 1992 | 73° | 40° | 56° | 0.53" | — |
| 1991 | 60° | 53° | 57° | 0.08" | — |
| 1990 | 51° | 27° | 39° | — | — |
| 1989 | 57° | 42° | 50° | — | — |
| 1988 | 76° | 45° | 60° | 0.03" | — |
| 1987 | 67° | 41° | 54° | — | — |
| 1986 | 64° | 34° | 49° | — | — |
| 1985 | 65° | 45° | 55° | — | — |
| 1984 | 70° | 51° | 60° | 2.64" | — |
| 1983coldest | 50° | 13° | 31° | — | — |
| 1982 | 43° | 38° | 40° | 0.74" | — |
| 1981 | 71° | 49° | 60° | — | — |
| 1980 | 72° | 35° | 53° | — | — |
| 1979 | 63° | 34° | 48° | — | — |
| 1978 | 44° | 35° | 40° | 1.93" | — |
| 1977 | 67° | 51° | 59° | — | — |
| 1976 | 43° | 26° | 34° | — | — |
| 1975 | 72° | 29° | 50° | — | — |
| 1974 | 68° | 51° | 60° | 0.69" | — |
| 1973 | 56° | 31° | 43° | — | — |
| 1972 | 62° | 38° | 50° | — | — |
| 1971 | 62° | 52° | 57° | 0.05" | — |
55 years of data from SAN ANTONIO INCARNATE WORD