Weather on September 17
Lancaster, CA
55 Years of Data
Avg High
89°F
Avg Low
57°F
Warmest
1971
84°F avg
Coldest
1982
62°F avg
About This Date
September 17th in Lancaster, CA typically brings warm fall weather, with average highs around 89°F and lows near 57°F — a 32°F daily swing. Over 55 years of records, the warmest September 17th was in 1971 (84°F average), while the coldest was 1982 (62°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 2% of September 17th dates historically. The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
Planning for September 17th in Lancaster, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 98° | 64° | 81° | — | — |
| 2024 | 78° | 50° | 64° | — | — |
| 2023 | 90° | 58° | 74° | — | — |
| 2022 | 82° | 57° | 70° | — | — |
| 2021 | 91° | 51° | 71° | — | — |
| 2020 | 98° | 49° | 73° | — | — |
| 2019 | 85° | 57° | 71° | — | — |
| 2018 | 90° | 49° | 69° | — | — |
| 2017 | 89° | 59° | 74° | — | — |
| 2016 | 95° | 49° | 72° | — | — |
| 2015 | 83° | 57° | 70° | — | — |
| 2014 | 99° | 65° | 82° | — | — |
| 2013 | 89° | 60° | 75° | — | — |
| 2012 | 94° | 64° | 79° | — | — |
| 2011 | 89° | 58° | 73° | — | — |
| 2010 | 92° | 48° | 70° | — | — |
| 2009 | 99° | 57° | 78° | — | — |
| 2008 | 94° | 61° | 77° | — | — |
| 2007 | 83° | 59° | 71° | — | — |
| 2006 | 87° | 41° | 64° | — | — |
| 2005 | 82° | 61° | 71° | — | — |
| 2004 | 92° | 63° | 77° | — | — |
| 2003 | 90° | 56° | 73° | — | — |
| 2002 | 89° | 50° | 70° | — | — |
| 2001 | 92° | 62° | 77° | — | — |
| 2000 | 103° | 59° | 81° | — | — |
| 1999 | 92° | 58° | 75° | — | — |
| 1998 | 92° | 55° | 73° | — | — |
| 1997 | 89° | 65° | 77° | — | — |
| 1996 | 82° | 46° | 64° | — | — |
| 1995 | 91° | 54° | 72° | — | — |
| 1994 | 91° | 55° | 73° | — | — |
| 1993 | 70° | 54° | 62° | — | — |
| 1992 | 92° | 66° | 79° | — | — |
| 1991 | 95° | 54° | 74° | — | — |
| 1990 | 80° | 63° | 71° | — | — |
| 1989 | 71° | 56° | 63° | — | — |
| 1988 | 89° | 61° | 75° | — | — |
| 1987 | 90° | 50° | 70° | — | — |
| 1986 | 82° | 51° | 67° | — | — |
| 1985 | 76° | 56° | 66° | — | — |
| 1984 | 94° | 67° | 80° | — | — |
| 1983 | 95° | 71° | 83° | — | — |
| 1982coldest | 75° | 49° | 62° | 0.08" | — |
| 1981 | 96° | 63° | 79° | — | — |
| 1980 | 96° | 59° | 78° | — | — |
| 1979 | 94° | 59° | 76° | — | — |
| 1978 | 74° | 58° | 66° | — | — |
| 1977 | 75° | 51° | 63° | — | — |
| 1976 | 76° | 54° | 65° | — | — |
| 1975 | 91° | 67° | 79° | — | — |
| 1974 | 95° | 53° | 74° | — | — |
| 1973 | 92° | 49° | 70° | — | — |
| 1972 | 90° | 50° | 70° | — | — |
| 1971warmest | 100° | 68° | 84° | — | — |
55 years of data from LANCASTER