Weather on May 21
Lancaster, CA
55 Years of Data
About This Date
May 21st in Lancaster, CA typically brings warm spring weather, with average highs around 81°F and lows near 54°F — a 27°F daily swing. Over 56 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 2.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.7°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.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 91° | 50° | 71° | — | — |
| 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° | — | — |
Lancaster, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Lancaster, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Lancaster, CA 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 Lancaster, CA
Lancaster, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.