Weather on August 20
Mcallen, TX
55 Years of Data
Avg High
97°F
Avg Low
77°F
Warmest
2011
91°F avg
Coldest
1982
71°F avg
About This Date
August 20th in Mcallen, TX typically brings hot summer weather, with average highs around 97°F and lows near 77°F. Over 55 years of records, the warmest August 20th was in 2011 (91°F average), while the coldest was 1982 (71°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 7% of August 20th dates historically, with the wettest August 20th recording 5.61" of rain. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in Mcallen, TX? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 100° | 80° | 90° | 0.03" | — |
| 2024 | 101° | 81° | 91° | — | — |
| 2023 | 100° | 79° | 89° | — | — |
| 2022 | 98° | 78° | 88° | — | — |
| 2021 | 98° | 78° | 88° | — | — |
| 2020 | 101° | 75° | 88° | — | — |
| 2019 | 102° | 79° | 90° | — | — |
| 2018 | 102° | 81° | 91° | — | — |
| 2017 | 103° | 78° | 90° | — | — |
| 2016 | 97° | 79° | 88° | — | — |
| 2015 | 86° | 75° | 81° | 5.61" | — |
| 2014 | 98° | 80° | 89° | — | — |
| 2013 | 97° | 75° | 86° | — | — |
| 2012 | 101° | 80° | 90° | — | — |
| 2011warmest | 103° | 79° | 91° | — | — |
| 2010 | 99° | 80° | 89° | — | — |
| 2009 | 100° | 80° | 90° | — | — |
| 2008 | 89° | 74° | 81° | — | — |
| 2007 | 98° | 79° | 88° | — | — |
| 2006 | 99° | 77° | 88° | — | — |
| 2005 | 97° | 79° | 88° | — | — |
| 2004 | 99° | 78° | 88° | — | — |
| 2003 | 95° | 77° | 86° | — | — |
| 2002 | 98° | 79° | 88° | — | — |
| 2001 | 102° | 79° | 90° | — | — |
| 2000 | 99° | 75° | 87° | — | — |
| 1999 | 97° | 77° | 87° | — | — |
| 1998 | 98° | 79° | 88° | — | — |
| 1997 | 100° | 78° | 89° | — | — |
| 1996 | 96° | 77° | 87° | — | — |
| 1995 | 91° | 75° | 83° | — | — |
| 1994 | 100° | 78° | 89° | — | — |
| 1993 | 99° | 73° | 86° | 0.81" | — |
| 1992 | 95° | 75° | 85° | — | — |
| 1991 | 99° | 77° | 88° | — | — |
| 1990 | 98° | 77° | 88° | — | — |
| 1989 | 94° | 74° | 84° | — | — |
| 1988 | 92° | 77° | 84° | — | — |
| 1987 | 98° | 76° | 87° | — | — |
| 1986 | 101° | 76° | 88° | — | — |
| 1985 | 102° | 75° | 89° | — | — |
| 1984 | 102° | 75° | 89° | — | — |
| 1983 | 99° | 75° | 87° | — | — |
| 1982coldest | 70° | 73° | 71° | — | — |
| 1981 | 99° | 79° | 89° | — | — |
| 1980 | 94° | — | — | — | — |
| 1979 | 97° | 74° | 85° | — | — |
| 1978 | 99° | 77° | 88° | — | — |
| 1977 | 98° | 76° | 87° | — | — |
| 1976 | 95° | 71° | 83° | 0.64" | — |
| 1975 | 95° | 73° | 84° | — | — |
| 1974 | 99° | 73° | 86° | — | — |
| 1973 | 95° | 72° | 83° | — | — |
| 1972 | 93° | 71° | 82° | — | — |
| 1971 | 95° | 71° | 83° | — | — |
55 years of data from MCALLEN