Weather on December 20
Lancaster, CA
55 Years of Data
Avg High
57°F
Avg Low
29°F
Warmest
2025
62°F avg
Coldest
1984
30°F avg
About This Date
December 20th in Lancaster, CA typically brings cool winter weather, with average highs around 57°F and lows near 29°F — a 28°F daily swing. Over 55 years of records, the warmest December 20th was in 2025 (62°F average), while the coldest was 1984 (30°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 11% of December 20th dates historically, with the wettest December 20th recording 2.41" 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 20th in Lancaster, CA? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 74° | 51° | 62° | — | — |
| 2024 | 69° | 26° | 48° | — | — |
| 2023 | 57° | 43° | 50° | 0.99" | — |
| 2022 | 58° | 27° | 43° | — | — |
| 2021 | 49° | 21° | 35° | — | — |
| 2020 | 64° | 18° | 41° | — | — |
| 2019 | 59° | 25° | 42° | — | — |
| 2018 | 63° | 27° | 45° | — | — |
| 2017 | 59° | 34° | 46° | — | — |
| 2016 | 56° | 10° | 33° | — | — |
| 2015 | 49° | 37° | 43° | — | — |
| 2014 | 57° | 37° | 47° | — | — |
| 2013 | 53° | 27° | 40° | — | — |
| 2012 | 48° | 13° | 30° | — | — |
| 2011 | 58° | 26° | 42° | — | — |
| 2010 | 51° | 45° | 48° | 2.41" | — |
| 2009 | 59° | 31° | 45° | — | — |
| 2008 | 48° | 32° | 40° | — | — |
| 2007 | 54° | 36° | 45° | — | — |
| 2006 | 52° | 15° | 33° | — | — |
| 2005 | 59° | 30° | 45° | — | — |
| 2004 | 70° | 23° | 46° | — | — |
| 2003 | 62° | 40° | 51° | — | — |
| 2002 | 51° | 36° | 43° | 1.63" | — |
| 2001 | 53° | 25° | 39° | 0.03" | — |
| 2000 | 63° | 25° | 44° | — | — |
| 1999 | 68° | 32° | 50° | — | — |
| 1998 | 49° | 36° | 42° | — | — |
| 1997 | 52° | 26° | 39° | — | — |
| 1996 | 66° | 26° | 46° | — | — |
| 1995 | 54° | 25° | 39° | — | — |
| 1994 | 63° | 25° | 44° | — | — |
| 1993 | 50° | 25° | 37° | — | — |
| 1992 | 44° | 19° | 32° | — | — |
| 1991 | 58° | 32° | 45° | — | — |
| 1990 | 41° | 28° | 35° | — | — |
| 1989 | 60° | 20° | 40° | — | — |
| 1988 | 51° | 36° | 43° | 0.23" | — |
| 1987 | 50° | 26° | 38° | — | — |
| 1986 | 56° | 33° | 44° | — | — |
| 1985 | 68° | 24° | 46° | — | — |
| 1984coldest | 39° | 22° | 30° | 0.18" | — |
| 1983 | 56° | 42° | 49° | — | — |
| 1982 | 67° | 25° | 46° | — | — |
| 1981 | 65° | 51° | 58° | — | — |
| 1980 | 65° | 31° | 48° | — | — |
| 1979 | 62° | 26° | 44° | — | — |
| 1978 | 47° | 25° | 36° | — | — |
| 1977 | 48° | 32° | 40° | — | — |
| 1976 | 59° | 25° | 42° | — | — |
| 1975 | 58° | 23° | 40° | — | — |
| 1974 | 59° | 19° | 39° | — | — |
| 1973 | 55° | 21° | 38° | — | — |
| 1972 | 66° | 36° | 51° | — | — |
| 1971 | 58° | 21° | 39° | — | — |
55 years of data from LANCASTER