Weather on December 20
Allen, TX
55 Years of Data
Avg High
57°F
Avg Low
35°F
Warmest
1978
66°F avg
Coldest
1983
22°F avg
About This Date
December 20th in Allen, TX typically brings cool winter weather, with average highs around 57°F and lows near 35°F. Over 55 years of records, the warmest December 20th was in 1978 (66°F average), while the coldest was 1983 (22°F) — a 44°F range across recorded history. Rain or other precipitation has occurred on about 18% of December 20th dates historically, with the wettest December 20th recording 7.24" of rain. The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Allen, TX? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 50° | 64° | — | — |
| 2024 | 56° | 34° | 45° | — | — |
| 2023 | 65° | 44° | 54° | — | — |
| 2022 | 55° | 35° | 45° | 0.03" | — |
| 2021 | 50° | 37° | 44° | 0.15" | — |
| 2020 | 63° | 29° | 46° | — | — |
| 2019 | 49° | 35° | 42° | 0.03" | — |
| 2018 | 60° | 46° | 53° | — | — |
| 2017 | 60° | 43° | 51° | 0.08" | — |
| 2016 | 52° | 23° | 38° | — | — |
| 2015 | 62° | 46° | 54° | — | — |
| 2014 | 47° | 44° | 45° | — | — |
| 2013 | 69° | 35° | 52° | — | — |
| 2012 | 52° | 29° | 41° | — | — |
| 2011 | 50° | 41° | 46° | — | — |
| 2010 | 75° | 46° | 61° | — | — |
| 2009 | 59° | 22° | 41° | — | — |
| 2008 | 67° | 30° | 49° | — | — |
| 2007 | 65° | 38° | 51° | — | — |
| 2006 | 63° | 44° | 53° | 2.59" | — |
| 2005 | 41° | 37° | 39° | 0.51" | — |
| 2004 | 71° | 33° | 52° | — | — |
| 2003 | 57° | 26° | 42° | — | — |
| 2002 | 57° | 34° | 45° | — | — |
| 2001 | 59° | 27° | 43° | — | — |
| 2000 | 64° | 31° | 47° | — | — |
| 1999 | 60° | 35° | 48° | — | — |
| 1998 | 53° | 41° | 47° | 0.05" | — |
| 1997 | 67° | 44° | 55° | — | — |
| 1996 | 45° | 19° | 32° | — | — |
| 1995 | 38° | 34° | 36° | — | — |
| 1994 | 58° | 47° | 52° | — | — |
| 1993 | 53° | 31° | 42° | — | — |
| 1992 | 58° | 34° | 46° | — | — |
| 1991 | 53° | 40° | 46° | 7.24" | — |
| 1990 | 64° | 46° | 55° | — | — |
| 1989 | 39° | 13° | 26° | — | — |
| 1988 | 65° | 43° | 54° | — | — |
| 1987 | 60° | 38° | 49° | 1.5" | — |
| 1986 | 54° | 32° | 43° | — | — |
| 1985 | 47° | 26° | 36° | — | — |
| 1984 | 66° | 49° | 57° | 0.15" | — |
| 1983coldest | 29° | 16° | 22° | — | — |
| 1982 | 66° | 32° | 49° | — | — |
| 1981 | 40° | 37° | 38° | — | — |
| 1980 | 34° | 24° | 29° | — | — |
| 1979 | 70° | 45° | 57° | — | — |
| 1978warmest | 75° | 57° | 66° | — | — |
| 1977 | 57° | 34° | 45° | — | — |
| 1976 | 67° | 31° | 49° | — | — |
| 1975 | 61° | 27° | 44° | — | — |
| 1974 | 59° | 34° | 46° | — | — |
| 1973 | 40° | 19° | 29° | — | — |
| 1972 | 65° | 35° | 50° | — | — |
| 1971 | 69° | 43° | 56° | — | — |
55 years of data from MCKINNEY MUNI AP