Weather on December 21
Allen, TX
55 Years of Data
About This Date
December 21st in Allen, TX typically brings cool winter weather, with average highs around 58°F and lows near 33°F — a 25°F daily swing. Over 55 years of records, the warmest December 21st was in 1984 (65°F average), while the coldest was 1983 (22°F) — a 43°F range across recorded history. Rain or other precipitation has occurred on about 16% of December 21st dates historically, with the wettest December 21st recording 8.23" of rain. The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Allen, TX? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 61° | 55° | 58° | — | — |
| 2024 | 52° | 28° | 40° | — | — |
| 2023 | 60° | 55° | 58° | 1.3" | — |
| 2022 | 51° | 29° | 40° | — | — |
| 2021 | 61° | 30° | 46° | — | — |
| 2020 | 70° | 31° | 51° | — | — |
| 2019 | 49° | 42° | 45° | — | — |
| 2018 | 58° | 36° | 47° | — | — |
| 2017 | 74° | 43° | 58° | — | — |
| 2016 | 65° | 35° | 50° | — | — |
| 2015 | 69° | 42° | 56° | — | — |
| 2014 | 51° | 46° | 49° | — | — |
| 2013 | 53° | 34° | 43° | 3.63" | — |
| 2012 | 62° | 21° | 42° | — | — |
| 2011 | 53° | 33° | 43° | — | — |
| 2010 | 82° | 48° | 65° | — | — |
| 2009 | 66° | 35° | 51° | — | — |
| 2008 | 36° | 19° | 28° | — | — |
| 2007 | 67° | 32° | 49° | — | — |
| 2006 | 58° | 35° | 46° | — | — |
| 2005 | 52° | 30° | 41° | — | — |
| 2004 | 66° | 40° | 53° | — | — |
| 2003 | 63° | 30° | 46° | — | — |
| 2002 | 60° | 35° | 48° | — | — |
| 2001 | 61° | 30° | 45° | — | — |
| 2000 | 48° | 23° | 36° | — | — |
| 1999 | 44° | 30° | 37° | — | — |
| 1998 | 54° | 24° | 39° | 0.13" | — |
| 1997 | 54° | 40° | 47° | 8.23" | — |
| 1996 | 63° | 34° | 48° | — | — |
| 1995 | 41° | 30° | 36° | 0.03" | — |
| 1994 | 61° | 40° | 50° | — | — |
| 1993 | 55° | 26° | 41° | — | — |
| 1992 | 56° | 38° | 47° | — | — |
| 1991 | 49° | 44° | 46° | — | — |
| 1990 | 62° | 15° | 39° | 0.15" | — |
| 1989 | 37° | 19° | 28° | — | — |
| 1988 | 68° | 36° | 52° | — | — |
| 1987 | 55° | 36° | 45° | — | — |
| 1986 | 52° | 38° | 45° | — | — |
| 1985 | 58° | 22° | 40° | — | — |
| 1984warmest | 67° | 63° | 65° | 0.18" | — |
| 1983coldest | 29° | 16° | 22° | 0.13" | — |
| 1982 | 70° | 37° | 53° | — | — |
| 1981 | 78° | 38° | 58° | 0.03" | — |
| 1980 | 39° | 17° | 28° | — | — |
| 1979 | 69° | 52° | 60° | — | — |
| 1978 | 57° | 29° | 43° | — | — |
| 1977 | 47° | 28° | 37° | — | — |
| 1976 | 53° | 16° | 34° | — | — |
| 1975 | 55° | 26° | 41° | — | — |
| 1974 | 67° | 30° | 48° | — | — |
| 1973 | 56° | 21° | 38° | — | — |
| 1972 | 60° | 41° | 51° | — | — |
| 1971 | 63° | 39° | 51° | — | — |
Allen, TX Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Allen, TX Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Allen, 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 Allen, TX
Allen, TX has no months that meet our "pleasant" threshold — every season has tradeoffs.