Weather on May 21
Mcallen, TX
55 Years of Data
Avg High
91°F
Avg Low
72°F
Warmest
2024
89°F avg
Coldest
1976
72°F avg
About This Date
May 21st in Mcallen, TX typically brings hot spring weather, with average highs around 91°F and lows near 72°F. Over 55 years of records, the warmest May 21st was in 2024 (89°F average), while the coldest was 1976 (72°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 7% of May 21st dates historically, with the wettest May 21st recording 2.77" of rain. The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in Mcallen, TX? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 93° | 81° | 87° | — | — |
| 2024warmest | 100° | 79° | 89° | — | — |
| 2023 | 86° | 73° | 80° | — | — |
| 2022 | 96° | 78° | 87° | — | — |
| 2021 | 86° | 61° | 73° | — | — |
| 2020 | 93° | 80° | 87° | 0.08" | — |
| 2019 | 96° | 81° | 88° | — | — |
| 2018 | 93° | 73° | 83° | 1.37" | — |
| 2017 | 92° | 78° | 85° | — | — |
| 2016 | 88° | 70° | 79° | 2.54" | — |
| 2015 | 92° | 78° | 85° | — | — |
| 2014 | 90° | 69° | 79° | — | — |
| 2013 | 93° | 77° | 85° | — | — |
| 2012 | 93° | 71° | 82° | — | — |
| 2011 | 98° | 79° | 88° | — | — |
| 2010 | 91° | 76° | 83° | — | — |
| 2009 | 90° | 68° | 79° | — | — |
| 2008 | 98° | 74° | 86° | — | — |
| 2007 | 84° | 71° | 78° | — | — |
| 2006 | 93° | 71° | 82° | — | — |
| 2005 | 96° | 73° | 85° | — | — |
| 2004 | 91° | 73° | 82° | — | — |
| 2003 | 96° | 75° | 86° | — | — |
| 2002 | 85° | 64° | 74° | — | — |
| 2001 | 96° | 75° | 86° | — | — |
| 2000 | 86° | 71° | 79° | — | — |
| 1999 | 93° | 65° | 79° | — | — |
| 1998 | 93° | 67° | 80° | — | — |
| 1997 | 84° | 70° | 77° | — | — |
| 1996 | 95° | 74° | 84° | — | — |
| 1995 | 91° | 63° | 77° | — | — |
| 1994 | 89° | 66° | 78° | — | — |
| 1993 | 89° | 68° | 79° | — | — |
| 1992 | 86° | 69° | 78° | — | — |
| 1991 | 88° | 72° | 80° | — | — |
| 1990 | 92° | 76° | 84° | — | — |
| 1989 | 93° | 77° | 85° | — | — |
| 1988 | 88° | 73° | 80° | — | — |
| 1987 | 90° | 70° | 80° | — | — |
| 1986 | 87° | 63° | 75° | — | — |
| 1985 | 91° | 75° | 83° | — | — |
| 1984 | 91° | 68° | 80° | — | — |
| 1983 | 93° | 76° | 84° | — | — |
| 1982 | 89° | 73° | 81° | 2.77" | — |
| 1981 | 84° | 71° | 78° | — | — |
| 1980 | 88° | 72° | 80° | — | — |
| 1979 | 87° | 68° | 78° | — | — |
| 1978 | 89° | 75° | 82° | — | — |
| 1977 | 90° | 75° | 82° | — | — |
| 1976coldest | 81° | 64° | 72° | — | — |
| 1975 | 94° | 77° | 85° | — | — |
| 1974 | 95° | 69° | 82° | — | — |
| 1973 | 94° | 70° | 82° | — | — |
| 1972 | 88° | 63° | 75° | — | — |
| 1971 | 92° | 74° | 83° | — | — |
55 years of data from MCALLEN