Weather on September 15
Lancaster, CA
55 Years of Data
Avg High
90°F
Avg Low
56°F
Warmest
1971
86°F avg
Coldest
1982
62°F avg
About This Date
September 15th in Lancaster, CA typically brings hot fall weather, with average highs around 90°F and lows near 56°F — a 34°F daily swing. Over 55 years of records, the warmest September 15th was in 1971 (86°F average), while the coldest was 1982 (62°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 15th dates historically, with the wettest September 15th recording 1.63" of rain. The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.
Planning for September 15th in Lancaster, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 53° | 74° | — | — |
| 2024 | 79° | 59° | 69° | — | — |
| 2023 | 95° | 60° | 78° | — | — |
| 2022 | 85° | 57° | 71° | — | — |
| 2021 | 95° | 53° | 74° | — | — |
| 2020 | 94° | 53° | 73° | — | — |
| 2019 | 94° | 63° | 78° | — | — |
| 2018 | 90° | 61° | 75° | — | — |
| 2017 | 84° | 61° | 72° | — | — |
| 2016 | 88° | 46° | 67° | — | — |
| 2015 | 79° | 63° | 71° | 1.63" | — |
| 2014 | 102° | 65° | 83° | — | — |
| 2013 | 98° | 64° | 81° | — | — |
| 2012 | 98° | 58° | 78° | — | — |
| 2011 | 91° | 57° | 74° | — | — |
| 2010 | 91° | 54° | 72° | — | — |
| 2009 | 92° | 50° | 71° | — | — |
| 2008 | 100° | 54° | 77° | — | — |
| 2007 | 90° | 47° | 68° | — | — |
| 2006 | 76° | 56° | 66° | — | — |
| 2005 | 88° | 46° | 67° | — | — |
| 2004 | 95° | 52° | 73° | — | — |
| 2003 | 93° | 59° | 76° | — | — |
| 2002 | 99° | 57° | 78° | — | — |
| 2001 | 95° | 55° | 75° | — | — |
| 2000 | 98° | 59° | 79° | — | — |
| 1999 | 94° | 54° | 74° | — | — |
| 1998 | 92° | 58° | 75° | — | — |
| 1997 | 87° | 62° | 75° | — | — |
| 1996 | 80° | 57° | 69° | — | — |
| 1995 | 100° | 58° | 79° | — | — |
| 1994 | 89° | 48° | 69° | — | — |
| 1993 | 84° | 57° | 71° | — | — |
| 1992 | 90° | 63° | 76° | — | — |
| 1991 | 93° | 55° | 74° | — | — |
| 1990 | 92° | 59° | 75° | — | — |
| 1989 | 95° | 54° | 74° | — | — |
| 1988 | 90° | 50° | 70° | — | — |
| 1987 | 91° | 53° | 72° | — | — |
| 1986 | 76° | 52° | 64° | — | — |
| 1985 | 87° | 60° | 74° | — | — |
| 1984 | 89° | 65° | 77° | 0.1" | — |
| 1983 | 101° | 66° | 83° | — | — |
| 1982coldest | 69° | 56° | 62° | — | — |
| 1981 | 94° | 62° | 78° | — | — |
| 1980 | 84° | 46° | 65° | — | — |
| 1979 | 94° | 58° | 76° | — | — |
| 1978 | 80° | 47° | 63° | — | — |
| 1977 | 77° | 56° | 66° | — | — |
| 1976 | 71° | 59° | 65° | — | — |
| 1975 | 92° | 56° | 74° | — | — |
| 1974 | 92° | 50° | 71° | — | — |
| 1973 | 90° | 49° | 69° | — | — |
| 1972 | 90° | 47° | 68° | — | — |
| 1971warmest | 104° | 68° | 86° | — | — |
55 years of data from LANCASTER