Weather on December 21
Mcallen, TX
55 Years of Data
Avg High
72°F
Avg Low
52°F
Warmest
1978
76°F avg
Coldest
1973
40°F avg
About This Date
December 21st in Mcallen, TX typically brings pleasant winter weather, with average highs around 72°F and lows near 52°F. Over 55 years of records, the warmest December 21st was in 1978 (76°F average), while the coldest was 1973 (40°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 11% of December 21st dates historically, with the wettest December 21st recording 0.71" of rain. The last decade has been 4.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.4°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Mcallen, TX? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 63° | 75° | — | — |
| 2024 | 74° | 57° | 65° | — | — |
| 2023 | 77° | 56° | 66° | — | — |
| 2022 | 67° | 52° | 59° | — | — |
| 2021 | 66° | 46° | 56° | — | — |
| 2020 | 76° | 50° | 63° | — | — |
| 2019 | 62° | 55° | 59° | 0.43" | — |
| 2018 | 76° | 44° | 60° | — | — |
| 2017 | 87° | 62° | 75° | — | — |
| 2016 | 65° | 45° | 55° | — | — |
| 2015 | 79° | 60° | 69° | — | — |
| 2014 | 59° | 55° | 57° | — | — |
| 2013 | 83° | 67° | 75° | — | — |
| 2012 | 68° | 44° | 56° | — | — |
| 2011 | 70° | 55° | 62° | — | — |
| 2010 | 82° | 59° | 71° | — | — |
| 2009 | 74° | 45° | 59° | — | — |
| 2008 | 87° | 65° | 76° | — | — |
| 2007 | 86° | 53° | 70° | — | — |
| 2006 | 85° | 63° | 74° | — | — |
| 2005 | 60° | 53° | 57° | — | — |
| 2004 | 72° | 42° | 57° | — | — |
| 2003 | 73° | 42° | 58° | — | — |
| 2002 | 73° | 45° | 59° | — | — |
| 2001 | 73° | 45° | 59° | — | — |
| 2000 | 74° | 40° | 57° | — | — |
| 1999 | 64° | 44° | 54° | 0.03" | — |
| 1998 | 81° | 67° | 74° | — | — |
| 1997 | 79° | 51° | 65° | — | — |
| 1996 | 50° | 49° | 49° | — | — |
| 1995 | 66° | 44° | 55° | — | — |
| 1994 | 70° | 56° | 63° | — | — |
| 1993 | 63° | 50° | 56° | — | — |
| 1992 | 77° | 50° | 64° | — | — |
| 1991 | 76° | 55° | 65° | 0.71" | — |
| 1990 | 87° | 65° | 76° | — | — |
| 1989 | 55° | 42° | 49° | — | — |
| 1988 | 83° | 61° | 72° | — | — |
| 1987 | 75° | 54° | 64° | — | — |
| 1986 | 75° | 49° | 62° | 0.23" | — |
| 1985 | 59° | 54° | 56° | 0.03" | — |
| 1984 | 83° | 64° | 73° | — | — |
| 1983 | 45° | 38° | 41° | 0.03" | — |
| 1982 | 86° | 60° | 73° | — | — |
| 1981 | 82° | 51° | 67° | — | — |
| 1980 | 44° | 38° | 41° | — | — |
| 1979 | 81° | 56° | 68° | — | — |
| 1978warmest | 88° | 64° | 76° | — | — |
| 1977 | 64° | 39° | 52° | — | — |
| 1976 | 66° | 41° | 54° | — | — |
| 1975 | 59° | 42° | 51° | — | — |
| 1974 | 69° | 45° | 57° | — | — |
| 1973coldest | 54° | 26° | 40° | — | — |
| 1972 | 84° | 56° | 70° | — | — |
| 1971 | 85° | 59° | 72° | — | — |
55 years of data from MCALLEN