Weather on May 21
Lancaster, CA
55 Years of Data
Avg High
80°F
Avg Low
54°F
Warmest
2001
80°F avg
Coldest
1971
53°F avg
About This Date
May 21st in Lancaster, CA typically brings warm spring weather, with average highs around 80°F and lows near 54°F — a 26°F daily swing. Over 55 years of records, the warmest May 21st was in 2001 (80°F average), while the coldest was 1971 (53°F) — a 27°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 3.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.2°F cooler on this date compared to 20-30 years ago.
Planning for May 21st in Lancaster, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 93° | 56° | 74° | — | — |
| 2024 | 85° | 51° | 68° | — | — |
| 2023 | 93° | 66° | 80° | — | — |
| 2022 | 81° | 50° | 65° | — | — |
| 2021 | 66° | 46° | 56° | — | — |
| 2020 | 85° | 43° | 64° | — | — |
| 2019 | 63° | 48° | 55° | — | — |
| 2018 | 70° | 54° | 62° | — | — |
| 2017 | 94° | 61° | 77° | — | — |
| 2016 | 68° | 48° | 58° | — | — |
| 2015 | 66° | 51° | 59° | — | — |
| 2014 | 73° | 51° | 62° | — | — |
| 2013 | 91° | 56° | 73° | — | — |
| 2012 | 97° | 55° | 76° | — | — |
| 2011 | 83° | 57° | 70° | — | — |
| 2010 | 74° | 51° | 62° | — | — |
| 2009 | 88° | 59° | 73° | — | — |
| 2008 | 72° | 58° | 65° | — | — |
| 2007 | 79° | 59° | 69° | — | — |
| 2006 | 76° | 52° | 64° | — | — |
| 2005 | 94° | 55° | 74° | — | — |
| 2004 | 74° | 54° | 64° | — | — |
| 2003 | 97° | 52° | 74° | — | — |
| 2002 | 64° | 45° | 54° | — | — |
| 2001warmest | 99° | 61° | 80° | — | — |
| 2000 | 98° | 61° | 79° | — | — |
| 1999 | 80° | 47° | 63° | — | — |
| 1998 | 72° | 49° | 60° | — | — |
| 1997 | 86° | 63° | 74° | — | — |
| 1996 | 80° | 58° | 69° | — | — |
| 1995 | 75° | 58° | 66° | — | — |
| 1994 | 81° | 43° | 62° | — | — |
| 1993 | 76° | 56° | 66° | — | — |
| 1992 | 85° | 59° | 72° | — | — |
| 1991 | 73° | 50° | 62° | — | — |
| 1990 | 79° | 55° | 67° | — | — |
| 1989 | 87° | 59° | 73° | — | — |
| 1988 | 95° | 55° | 75° | — | — |
| 1987 | 72° | 48° | 60° | — | — |
| 1986 | 67° | 55° | 61° | — | — |
| 1985 | 88° | 59° | 73° | — | — |
| 1984 | 88° | 67° | 77° | — | — |
| 1983 | 89° | 62° | 76° | — | — |
| 1982 | 85° | 60° | 72° | — | — |
| 1981 | 77° | 51° | 64° | — | — |
| 1980 | 69° | 53° | 61° | — | — |
| 1979 | 88° | 55° | 71° | — | — |
| 1978 | 81° | 59° | 70° | — | — |
| 1977 | 85° | 59° | 72° | — | — |
| 1976 | 76° | 53° | 64° | — | — |
| 1975 | 68° | 45° | 56° | — | — |
| 1974 | 83° | 41° | 62° | — | — |
| 1973 | 81° | 50° | 65° | — | — |
| 1972 | 73° | 48° | 61° | — | — |
| 1971coldest | 63° | 43° | 53° | — | — |
55 years of data from LANCASTER