Weather on December 21
Richardson, TX
55 Years of Data
Avg High
59°F
Avg Low
37°F
Warmest
2010
68°F avg
Coldest
1983
20°F avg
About This Date
December 21st in Richardson, TX typically brings cool winter weather, with average highs around 59°F and lows near 37°F. Over 55 years of records, the warmest December 21st was in 2010 (68°F average), while the coldest was 1983 (20°F) — a 48°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 3.84" of rain. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Richardson, TX? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 55° | 68° | — | — |
| 2024 | 53° | 33° | 43° | — | — |
| 2023 | 59° | 55° | 57° | 1.8" | — |
| 2022 | 52° | 31° | 41° | — | — |
| 2021 | 61° | 34° | 47° | — | — |
| 2020 | 71° | 36° | 53° | — | — |
| 2019 | 48° | 37° | 43° | 0.05" | — |
| 2018 | 58° | 37° | 47° | — | — |
| 2017 | 76° | 47° | 61° | — | — |
| 2016 | 65° | 39° | 52° | — | — |
| 2015 | 69° | 46° | 58° | — | — |
| 2014 | 51° | 46° | 49° | — | — |
| 2013 | 54° | 33° | 43° | 3.84" | — |
| 2012 | 64° | 29° | 46° | — | — |
| 2011 | 55° | 33° | 44° | — | — |
| 2010warmest | 83° | 54° | 68° | — | — |
| 2009 | 65° | 39° | 52° | — | — |
| 2008 | 36° | 20° | 28° | — | — |
| 2007 | 69° | 35° | 52° | — | — |
| 2006 | 59° | 43° | 51° | — | — |
| 2005 | 53° | 40° | 46° | — | — |
| 2004 | 67° | 46° | 56° | — | — |
| 2003 | 71° | 43° | 57° | — | — |
| 2002 | 70° | 41° | 55° | — | — |
| 2001 | 62° | 36° | 49° | — | — |
| 2000 | 48° | 30° | 39° | — | — |
| 1999 | 48° | 32° | 40° | — | — |
| 1998 | 56° | 24° | 40° | 0.05" | — |
| 1997 | 56° | 42° | 49° | — | — |
| 1996 | 68° | 39° | 54° | — | — |
| 1995 | 45° | 35° | 40° | — | — |
| 1994 | 65° | 42° | 53° | — | — |
| 1993 | 53° | 32° | 43° | 0.03" | — |
| 1992 | 62° | 40° | 51° | — | — |
| 1991 | 49° | 44° | 46° | 0.15" | — |
| 1990 | 47° | 15° | 31° | 0.08" | — |
| 1989 | 40° | 22° | 31° | — | — |
| 1988 | 70° | 41° | 55° | — | — |
| 1987 | 59° | 39° | 49° | — | — |
| 1986 | 53° | 45° | 49° | 0.05" | — |
| 1985 | 58° | 32° | 45° | — | — |
| 1984 | 69° | 53° | 61° | — | — |
| 1983coldest | 32° | 9° | 20° | 0.03" | — |
| 1982 | 73° | 47° | 60° | — | — |
| 1981 | 80° | 44° | 62° | — | — |
| 1980 | 35° | 21° | 28° | — | — |
| 1979 | 71° | 58° | 64° | — | — |
| 1978 | 57° | 30° | 44° | — | — |
| 1977 | 47° | 31° | 39° | — | — |
| 1976 | 43° | 23° | 33° | — | — |
| 1975 | 54° | 26° | 40° | — | — |
| 1974 | 71° | 34° | 52° | — | — |
| 1973 | 57° | 27° | 42° | — | — |
| 1972 | 51° | 35° | 43° | — | — |
| 1971 | 62° | 39° | 51° | — | — |
55 years of data from RICHARDSON