Weather on August 18
Mcallen, TX
55 Years of Data
About This Date
August 18th in Mcallen, TX typically brings hot summer weather, with average highs around 98°F and lows near 77°F. Over 55 years of records, the warmest August 18th was in 2019 (93°F average), while the coldest was 1988 (77°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 9% of August 18th dates historically, with the wettest August 18th recording 1.65" 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 August 18th in Mcallen, TX? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 100° | 79° | 89° | — | — |
| 2024 | 101° | 81° | 91° | — | — |
| 2023 | 101° | — | — | — | — |
| 2022 | 96° | 79° | 87° | — | — |
| 2021 | 97° | 78° | 87° | — | — |
| 2020 | 99° | 76° | 87° | — | — |
| 2019warmest | 104° | 82° | 93° | — | — |
| 2018 | 103° | 78° | 90° | — | — |
| 2017 | 99° | 80° | 89° | — | — |
| 2016 | 95° | 75° | 85° | 0.81" | — |
| 2015 | 102° | 77° | 90° | — | — |
| 2014 | 101° | 81° | 91° | — | — |
| 2013 | 98° | 80° | 89° | — | — |
| 2012 | 101° | 80° | 90° | — | — |
| 2011 | 102° | 79° | 90° | — | — |
| 2010 | 101° | 80° | 90° | — | — |
| 2009 | 101° | 81° | 91° | — | — |
| 2008 | 96° | 80° | 88° | — | — |
| 2007 | 95° | 80° | 88° | — | — |
| 2006 | 97° | 79° | 88° | 0.05" | — |
| 2005 | 98° | 78° | 88° | 1.65" | — |
| 2004 | 98° | 73° | 86° | — | — |
| 2003 | 95° | 76° | 85° | — | — |
| 2002 | 97° | 79° | 88° | — | — |
| 2001 | 100° | 79° | 89° | — | — |
| 2000 | 100° | 76° | 88° | — | — |
| 1999 | 97° | 75° | 86° | — | — |
| 1998 | 98° | 82° | 90° | — | — |
| 1997 | 100° | 79° | 89° | — | — |
| 1996 | 100° | 76° | 88° | — | — |
| 1995 | 95° | 76° | 85° | — | — |
| 1994 | 102° | 78° | 90° | — | — |
| 1993 | 98° | 76° | 87° | — | — |
| 1992 | 89° | 70° | 79° | — | — |
| 1991 | 99° | 77° | 88° | — | — |
| 1990 | 97° | 76° | 86° | — | — |
| 1989 | 92° | 75° | 83° | — | — |
| 1988coldest | 81° | 73° | 77° | 1.52" | — |
| 1987 | 99° | 78° | 88° | — | — |
| 1986 | 100° | 78° | 89° | — | — |
| 1985 | 100° | 78° | 89° | — | — |
| 1984 | 97° | 74° | 85° | — | — |
| 1983 | 95° | 75° | 85° | — | — |
| 1982 | 98° | 74° | 86° | — | — |
| 1981 | 103° | 75° | 89° | — | — |
| 1980 | 94° | 75° | 84° | — | — |
| 1979 | 98° | 71° | 85° | — | — |
| 1978 | 98° | 75° | 87° | — | — |
| 1977 | 98° | 73° | 86° | — | — |
| 1976 | 95° | 73° | 84° | — | — |
| 1975 | 95° | 73° | 84° | — | — |
| 1974 | 99° | 72° | 85° | — | — |
| 1973 | 93° | 74° | 83° | 0.05" | — |
| 1972 | 97° | 73° | 85° | — | — |
| 1971 | 96° | 72° | 84° | — | — |
Mcallen, TX Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Mcallen, TX Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Mcallen, TX Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Mcallen, TX
Mcallen, TX has no months that meet our "pleasant" threshold — every season has tradeoffs.