Weather on December 20
San Antonio, TX
55 Years of Data
Avg High
65°F
Avg Low
43°F
Warmest
1984
71°F avg
Coldest
1983
33°F avg
About This Date
December 20th in San Antonio, TX typically brings mild winter weather, with average highs around 65°F and lows near 43°F. Over 55 years of records, the warmest December 20th was in 1984 (71°F average), while the coldest was 1983 (33°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 22% of December 20th dates historically, with the wettest December 20th recording 2.74" of rain. The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in San Antonio, TX? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 51° | 61° | — | — |
| 2024 | 70° | 46° | 58° | — | — |
| 2023 | 73° | 50° | 62° | — | — |
| 2022 | 53° | 44° | 49° | — | — |
| 2021 | 52° | 41° | 46° | — | — |
| 2020 | 72° | 36° | 54° | — | — |
| 2019 | 53° | 49° | 51° | 0.86" | — |
| 2018 | 70° | 48° | 59° | 0.08" | — |
| 2017 | 66° | 54° | 60° | 0.2" | — |
| 2016 | 57° | 40° | 48° | — | — |
| 2015 | 70° | 52° | 61° | — | — |
| 2014 | 60° | 48° | 54° | — | — |
| 2013 | 76° | 58° | 67° | — | — |
| 2012 | 83° | 43° | 63° | — | — |
| 2011 | 73° | 46° | 60° | 0.18" | — |
| 2010 | 68° | 34° | 51° | — | — |
| 2009 | 64° | 34° | 49° | — | — |
| 2008 | 79° | 63° | 71° | 0.03" | — |
| 2007 | 68° | 54° | 61° | — | — |
| 2006 | 67° | 64° | 65° | 0.33" | — |
| 2005 | 56° | 46° | 51° | — | — |
| 2004 | 67° | 42° | 54° | — | — |
| 2003 | 65° | 31° | 48° | — | — |
| 2002 | 74° | 35° | 54° | — | — |
| 2001 | 65° | 34° | 49° | — | — |
| 2000 | 60° | 30° | 45° | — | — |
| 1999 | 71° | 33° | 52° | — | — |
| 1998 | 76° | 45° | 60° | — | — |
| 1997 | 76° | 53° | 64° | 0.79" | — |
| 1996 | 46° | 23° | 35° | — | — |
| 1995 | 48° | 30° | 39° | — | — |
| 1994 | 75° | 52° | 63° | — | — |
| 1993 | 60° | 42° | 51° | — | — |
| 1992 | 66° | 44° | 55° | 0.23" | — |
| 1991 | 70° | 66° | 68° | 2.74" | — |
| 1990 | 74° | 49° | 61° | — | — |
| 1989 | 53° | 26° | 40° | — | — |
| 1988 | 74° | 60° | 67° | — | — |
| 1987 | 62° | 47° | 54° | — | — |
| 1986 | 55° | 40° | 47° | — | — |
| 1985 | 62° | 33° | 48° | — | — |
| 1984warmest | 76° | 66° | 71° | — | — |
| 1983coldest | 36° | 31° | 33° | 0.03" | — |
| 1982 | 69° | 33° | 51° | — | — |
| 1981 | 56° | 44° | 50° | 0.08" | — |
| 1980 | 42° | 35° | 39° | — | — |
| 1979 | 74° | 50° | 62° | — | — |
| 1978 | 78° | 54° | 66° | 0.05" | — |
| 1977 | 57° | 35° | 46° | — | — |
| 1976 | 61° | 33° | 47° | — | — |
| 1975 | 69° | 30° | 50° | — | — |
| 1974 | 65° | 34° | 49° | — | — |
| 1973 | 48° | 22° | 35° | — | — |
| 1972 | 73° | 47° | 60° | — | — |
| 1971 | 80° | 43° | 61° | — | — |
55 years of data from SAN ANTONIO INCARNATE WORD