Weather on March 21
Mcallen, TX
55 Years of Data
Avg High
82°F
Avg Low
58°F
Warmest
1976
83°F avg
Coldest
2010
56°F avg
About This Date
March 21st in Mcallen, TX typically brings warm spring weather, with average highs around 82°F and lows near 58°F. Over 56 years of records, the warmest March 21st was in 1976 (83°F average), while the coldest was 2010 (56°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 7% of March 21st dates historically, with the wettest March 21st recording 0.89" 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 March 21st in Mcallen, TX? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 89° | 61° | 75° | — | — |
| 2025 | 75° | 53° | 64° | — | — |
| 2024 | 71° | 59° | 65° | 0.89" | — |
| 2023 | 68° | 50° | 59° | 0.2" | — |
| 2022 | 81° | 54° | 67° | — | — |
| 2021 | 78° | 52° | 65° | — | — |
| 2020 | 67° | 59° | 63° | 0.53" | — |
| 2019 | 81° | 61° | 71° | — | — |
| 2018 | 86° | 59° | 73° | — | — |
| 2017 | 86° | 64° | 75° | — | — |
| 2016 | 70° | 51° | 60° | — | — |
| 2015 | 84° | 70° | 77° | — | — |
| 2014 | 82° | 64° | 73° | — | — |
| 2013 | 80° | 62° | 71° | — | — |
| 2012 | 79° | 63° | 71° | — | — |
| 2011 | 83° | 71° | 77° | — | — |
| 2010coldest | 70° | 42° | 56° | — | — |
| 2009 | 89° | 58° | 73° | — | — |
| 2008 | 81° | 50° | 65° | — | — |
| 2007 | 81° | 70° | 75° | — | — |
| 2006 | 95° | 67° | 81° | — | — |
| 2005 | 87° | 67° | 77° | — | — |
| 2004 | 82° | 66° | 74° | — | — |
| 2003 | 84° | 55° | 70° | — | — |
| 2002 | 81° | 55° | 68° | — | — |
| 2001 | 76° | 50° | 63° | — | — |
| 2000 | 80° | 53° | 67° | — | — |
| 1999 | 75° | 56° | 65° | — | — |
| 1998 | 73° | 49° | 61° | — | — |
| 1997 | 81° | 54° | 67° | — | — |
| 1996 | 76° | 48° | 62° | — | — |
| 1995 | 93° | 60° | 77° | — | — |
| 1994 | 89° | 70° | 79° | — | — |
| 1993 | 81° | 61° | 71° | — | — |
| 1992 | 81° | 56° | 68° | — | — |
| 1991 | 87° | 54° | 70° | — | — |
| 1990 | 81° | 52° | 66° | — | — |
| 1989 | 92° | 70° | 81° | — | — |
| 1988 | 76° | 45° | 60° | — | — |
| 1987 | 83° | 67° | 75° | — | — |
| 1986 | 72° | 47° | 59° | — | — |
| 1985 | 86° | 58° | 72° | — | — |
| 1984 | 78° | 50° | 64° | — | — |
| 1983 | 88° | 49° | 68° | — | — |
| 1982 | 90° | 70° | 80° | 0.08" | — |
| 1981 | 75° | 44° | 60° | — | — |
| 1980 | 88° | 60° | 74° | — | — |
| 1979 | 78° | 70° | 74° | — | — |
| 1978 | 81° | 49° | 65° | — | — |
| 1977 | 80° | 55° | 68° | — | — |
| 1976warmest | 97° | 69° | 83° | — | — |
| 1975 | 87° | 52° | 69° | — | — |
| 1974 | 97° | 60° | 78° | — | — |
| 1973 | 75° | 53° | 64° | — | — |
| 1972 | 90° | 67° | 78° | — | — |
| 1971 | 76° | 46° | 61° | — | — |
56 years of data from MCALLEN