Weather on December 21
Lancaster, CA
55 Years of Data
Avg High
58°F
Avg Low
29°F
Warmest
2025
59°F avg
Coldest
1984
22°F avg
About This Date
December 21st in Lancaster, CA typically brings cool winter weather, with average highs around 58°F and lows near 29°F — a 29°F daily swing. Over 55 years of records, the warmest December 21st was in 2025 (59°F average), while the coldest was 1984 (22°F) — a 37°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 1.07" 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 December 21st in Lancaster, CA? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 75° | 42° | 59° | — | — |
| 2024 | 73° | 26° | 50° | — | — |
| 2023 | 60° | 49° | 54° | 0.08" | — |
| 2022 | 61° | 23° | 42° | — | — |
| 2021 | 52° | 30° | 41° | — | — |
| 2020 | 68° | 22° | 45° | — | — |
| 2019 | 53° | 29° | 41° | — | — |
| 2018 | 73° | 39° | 56° | — | — |
| 2017 | 52° | 18° | 35° | — | — |
| 2016 | 54° | 35° | 44° | 0.58" | — |
| 2015 | 60° | 35° | 48° | — | — |
| 2014 | 65° | 42° | 53° | — | — |
| 2013 | 65° | 26° | 46° | — | — |
| 2012 | 51° | 10° | 31° | — | — |
| 2011 | 62° | 20° | 41° | — | — |
| 2010 | 49° | 44° | 46° | 1.07" | — |
| 2009 | 61° | 34° | 47° | — | — |
| 2008 | 52° | 29° | 40° | — | — |
| 2007 | 50° | 24° | 37° | — | — |
| 2006 | 54° | 17° | 35° | — | — |
| 2005 | 66° | 34° | 50° | — | — |
| 2004 | 66° | 32° | 49° | — | — |
| 2003 | 66° | 34° | 50° | — | — |
| 2002 | 51° | 38° | 44° | — | — |
| 2001 | 52° | 37° | 44° | 0.33" | — |
| 2000 | 73° | 23° | 48° | — | — |
| 1999 | 73° | 29° | 51° | — | — |
| 1998 | 41° | 17° | 29° | — | — |
| 1997 | 50° | 32° | 41° | — | — |
| 1996 | 64° | 45° | 54° | — | — |
| 1995 | 53° | 17° | 35° | — | — |
| 1994 | 61° | 22° | 41° | — | — |
| 1993 | 52° | 18° | 35° | — | — |
| 1992 | 47° | 19° | 33° | — | — |
| 1991 | 56° | 26° | 41° | — | — |
| 1990 | 34° | 18° | 26° | — | — |
| 1989 | 61° | 20° | 40° | — | — |
| 1988 | 49° | 34° | 41° | 0.58" | — |
| 1987 | 52° | 26° | 39° | — | — |
| 1986 | 59° | 25° | 42° | — | — |
| 1985 | 67° | 25° | 46° | — | — |
| 1984coldest | 31° | 13° | 22° | — | — |
| 1983 | 51° | 35° | 43° | — | — |
| 1982 | 52° | 36° | 44° | — | — |
| 1981 | 54° | 45° | 49° | — | — |
| 1980 | 71° | 29° | 50° | — | — |
| 1979 | 58° | 38° | 48° | — | — |
| 1978 | 51° | 23° | 37° | — | — |
| 1977 | 46° | 34° | 40° | 0.2" | — |
| 1976 | 59° | 18° | 38° | — | — |
| 1975 | 61° | 28° | 44° | — | — |
| 1974 | 68° | 28° | 48° | — | — |
| 1973 | 60° | 24° | 42° | — | — |
| 1972 | 70° | 31° | 50° | — | — |
| 1971 | 48° | 25° | 36° | — | — |
55 years of data from LANCASTER