Weather on May 18
Mcallen, TX
55 Years of Data
Avg High
90°F
Avg Low
71°F
Warmest
2025
88°F avg
Coldest
2002
69°F avg
About This Date
May 18th in Mcallen, TX typically brings hot spring weather, with average highs around 90°F and lows near 71°F. Over 55 years of records, the warmest May 18th was in 2025 (88°F average), while the coldest was 2002 (69°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 18% of May 18th dates historically, with the wettest May 18th recording 3.94" of rain. The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for May 18th 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 |
|---|---|---|---|---|---|
| 2025warmest | 97° | 79° | 88° | — | — |
| 2024 | 87° | 72° | 79° | 1.32" | — |
| 2023 | 90° | 70° | 80° | 1.57" | — |
| 2022 | 93° | 74° | 83° | — | — |
| 2021 | 89° | 72° | 80° | — | — |
| 2020 | 96° | 73° | 85° | — | — |
| 2019 | 94° | 80° | 87° | — | — |
| 2018 | 98° | 75° | 87° | — | — |
| 2017 | 97° | 78° | 87° | — | — |
| 2016 | 96° | 76° | 86° | 0.23" | — |
| 2015 | 90° | 78° | 84° | — | — |
| 2014 | 86° | 63° | 74° | — | — |
| 2013 | 94° | 76° | 85° | — | — |
| 2012 | 85° | 68° | 76° | — | — |
| 2011 | 86° | 69° | 78° | — | — |
| 2010 | 95° | 77° | 86° | — | — |
| 2009 | 93° | 67° | 80° | — | — |
| 2008 | 85° | 69° | 77° | — | — |
| 2007 | 83° | 70° | 76° | 0.25" | — |
| 2006 | 94° | 67° | 80° | — | — |
| 2005 | 91° | 68° | 80° | — | — |
| 2004 | 91° | 74° | 82° | — | — |
| 2003 | 98° | 64° | 81° | — | — |
| 2002coldest | 74° | 65° | 69° | 1.83" | — |
| 2001 | 91° | 74° | 82° | — | — |
| 2000 | 92° | 76° | 84° | — | — |
| 1999 | 93° | 65° | 79° | 2.03" | — |
| 1998 | 92° | 73° | 82° | — | — |
| 1997 | 88° | 70° | 79° | — | — |
| 1996 | 92° | 73° | 82° | — | — |
| 1995 | 95° | 77° | 86° | — | — |
| 1994 | 93° | 74° | 83° | — | — |
| 1993 | 87° | 69° | 78° | — | — |
| 1992 | 88° | 67° | 77° | — | — |
| 1991 | 87° | 69° | 78° | — | — |
| 1990 | 91° | 76° | 83° | — | — |
| 1989 | 96° | 78° | 87° | — | — |
| 1988 | 89° | 70° | 79° | — | — |
| 1987 | 93° | 73° | 83° | 0.1" | — |
| 1986 | 89° | 67° | 78° | 3.94" | — |
| 1985 | 87° | 64° | 76° | 2.11" | — |
| 1984 | 88° | 68° | 78° | — | — |
| 1983 | 86° | 61° | 73° | — | — |
| 1982 | 85° | 65° | 75° | — | — |
| 1981 | 97° | 76° | 86° | — | — |
| 1980 | 95° | 72° | 83° | — | — |
| 1979 | 86° | 61° | 73° | — | — |
| 1978 | 95° | 75° | 85° | — | — |
| 1977 | 89° | 76° | 82° | — | — |
| 1976 | 84° | 67° | 75° | — | — |
| 1975 | 87° | 68° | 78° | — | — |
| 1974 | 94° | 74° | 84° | — | — |
| 1973 | 83° | 60° | 71° | — | — |
| 1972 | 90° | 69° | 79° | 0.25" | — |
| 1971 | 89° | 66° | 78° | — | — |
55 years of data from MCALLEN