Weather on September 20
Lancaster, CA
55 Years of Data
Avg High
87°F
Avg Low
55°F
Warmest
1981
81°F avg
Coldest
1978
56°F avg
About This Date
September 20th in Lancaster, CA typically brings warm fall weather, with average highs around 87°F and lows near 55°F — a 32°F daily swing. Over 55 years of records, the warmest September 20th was in 1981 (81°F average), while the coldest was 1978 (56°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 2% of September 20th dates historically, with the wettest September 20th recording 2.03" 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 September 20th in Lancaster, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 89° | 56° | 72° | — | — |
| 2024 | 82° | 58° | 70° | — | — |
| 2023 | 78° | 58° | 68° | — | — |
| 2022 | 81° | 55° | 68° | — | — |
| 2021 | 92° | 55° | 73° | — | — |
| 2020 | 95° | 48° | 72° | — | — |
| 2019 | 82° | 51° | 67° | — | — |
| 2018 | 92° | 46° | 69° | — | — |
| 2017 | 82° | 60° | 71° | — | — |
| 2016 | 92° | 67° | 79° | — | — |
| 2015 | 98° | 58° | 78° | — | — |
| 2014 | 90° | 56° | 73° | — | — |
| 2013 | 90° | 51° | 70° | — | — |
| 2012 | 99° | 61° | 80° | — | — |
| 2011 | 98° | 56° | 77° | — | — |
| 2010 | 92° | 59° | 75° | — | — |
| 2009 | 95° | 66° | 81° | — | — |
| 2008 | 83° | 60° | 71° | — | — |
| 2007 | 68° | 50° | 59° | — | — |
| 2006 | 85° | 56° | 70° | — | — |
| 2005 | 71° | 61° | 66° | 2.03" | — |
| 2004 | 73° | 50° | 62° | — | — |
| 2003 | 98° | 51° | 75° | — | — |
| 2002 | 95° | 50° | 73° | — | — |
| 2001 | 95° | 53° | 74° | — | — |
| 2000 | 100° | 61° | 80° | — | — |
| 1999 | 90° | 49° | 69° | — | — |
| 1998 | 72° | 60° | 66° | — | — |
| 1997 | 83° | 50° | 66° | — | — |
| 1996 | 90° | 55° | 72° | — | — |
| 1995 | 98° | 63° | 80° | — | — |
| 1994 | 90° | 54° | 72° | — | — |
| 1993 | 83° | 49° | 66° | — | — |
| 1992 | 93° | 56° | 74° | — | — |
| 1991 | 92° | 61° | 76° | — | — |
| 1990 | 86° | 51° | 69° | — | — |
| 1989 | 81° | 43° | 62° | — | — |
| 1988 | 64° | 52° | 58° | — | — |
| 1987 | 96° | 56° | 76° | — | — |
| 1986 | 75° | 49° | 62° | — | — |
| 1985 | 80° | 49° | 64° | — | — |
| 1984 | 90° | 69° | 79° | — | — |
| 1983 | 82° | 63° | 72° | — | — |
| 1982 | 83° | 50° | 66° | — | — |
| 1981warmest | 91° | 72° | 81° | — | — |
| 1980 | 83° | 49° | 66° | — | — |
| 1979 | 93° | 54° | 73° | — | — |
| 1978coldest | 74° | 38° | 56° | — | — |
| 1977 | 74° | 52° | 63° | — | — |
| 1976 | 83° | 63° | 73° | — | — |
| 1975 | 97° | 59° | 78° | — | — |
| 1974 | 95° | 57° | 76° | — | — |
| 1973 | 82° | 58° | 70° | — | — |
| 1972 | 85° | 45° | 65° | — | — |
| 1971 | 86° | 55° | 71° | — | — |
55 years of data from LANCASTER