Weather on March 31
San Antonio, TX
55 Years of Data
Avg High
78°F
Avg Low
53°F
Warmest
2026
79°F avg
Coldest
2003
50°F avg
About This Date
March 31st in San Antonio, TX typically brings pleasant spring weather, with average highs around 78°F and lows near 53°F — a 25°F daily swing. Over 56 years of records, the warmest March 31st was in 2026 (79°F average), while the coldest was 2003 (50°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 16% of March 31st dates historically, with the wettest March 31st recording 3.56" of rain. The last decade has been 6.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.1°F warmer on this date compared to 20-30 years ago.
Planning for March 31st in San Antonio, TX? Great weather for outdoor activities.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 89° | 68° | 79° | — | — |
| 2025 | 87° | 66° | 77° | 0.84" | — |
| 2024 | 75° | 64° | 70° | — | — |
| 2023 | 87° | 66° | 77° | — | — |
| 2022 | 80° | 47° | 63° | — | — |
| 2021 | 80° | 61° | 70° | — | — |
| 2020 | 74° | 59° | 66° | — | — |
| 2019 | 69° | 48° | 59° | — | — |
| 2018 | 73° | 58° | 65° | — | — |
| 2017 | 86° | 52° | 69° | — | — |
| 2016 | 86° | 66° | 76° | — | — |
| 2015 | 77° | 67° | 72° | — | — |
| 2014 | 81° | 48° | 64° | — | — |
| 2013 | 85° | 64° | 74° | — | — |
| 2012 | 85° | 63° | 74° | — | — |
| 2011 | 71° | 46° | 59° | — | — |
| 2010 | 81° | 44° | 62° | — | — |
| 2009 | 85° | 54° | 69° | — | — |
| 2008 | 82° | 69° | 76° | 0.15" | — |
| 2007 | 74° | 58° | 66° | 3.56" | — |
| 2006 | 82° | 65° | 73° | — | — |
| 2005 | 88° | 56° | 72° | — | — |
| 2004 | 82° | 44° | 63° | — | — |
| 2003coldest | 69° | 31° | 50° | — | — |
| 2002 | 85° | 55° | 70° | 0.15" | — |
| 2001 | 66° | 49° | 57° | — | — |
| 2000 | 94° | 55° | 74° | — | — |
| 1999 | 73° | 57° | 65° | — | — |
| 1998 | 88° | 52° | 70° | 0.05" | — |
| 1997 | 63° | 50° | 56° | 0.91" | — |
| 1996 | 74° | 52° | 63° | — | — |
| 1995 | 60° | 52° | 56° | 0.15" | — |
| 1994 | 73° | 46° | 60° | — | — |
| 1993 | 78° | 53° | 66° | — | — |
| 1992 | 70° | 50° | 60° | — | — |
| 1991 | 70° | 41° | 55° | — | — |
| 1990 | 71° | 54° | 62° | — | — |
| 1989 | 76° | 53° | 64° | — | — |
| 1988 | 77° | 53° | 65° | 0.03" | — |
| 1987 | 75° | 31° | 53° | — | — |
| 1986 | 81° | 58° | 69° | — | — |
| 1985 | 71° | 38° | 54° | — | — |
| 1984 | 78° | 56° | 67° | — | — |
| 1983 | 84° | 51° | 68° | — | — |
| 1982 | 86° | 65° | 75° | — | — |
| 1981 | 83° | 50° | 66° | — | — |
| 1980 | 80° | 47° | 63° | — | — |
| 1979 | 76° | 61° | 68° | 0.05" | — |
| 1978 | 79° | 58° | 68° | — | — |
| 1977 | 69° | 53° | 61° | — | — |
| 1976 | 77° | 40° | 58° | — | — |
| 1975 | 69° | 44° | 57° | — | — |
| 1974 | 90° | 53° | 71° | — | — |
| 1973 | 84° | 46° | 65° | — | — |
| 1972 | 72° | 36° | 54° | — | — |
| 1971 | 86° | 54° | 70° | — | — |
56 years of data from SAN ANTONIO INCARNATE WORD