Weather on September 18
Lancaster, CA
55 Years of Data
Avg High
88°F
Avg Low
56°F
Warmest
1979
84°F avg
Coldest
1978
55°F avg
About This Date
September 18th in Lancaster, CA typically brings warm fall weather, with average highs around 88°F and lows near 56°F — a 32°F daily swing. Over 55 years of records, the warmest September 18th was in 1979 (84°F average), while the coldest was 1978 (55°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 7% of September 18th dates historically. The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
Planning for September 18th in Lancaster, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 66° | 74° | 0.13" | — |
| 2024 | 81° | 50° | 65° | — | — |
| 2023 | 83° | 60° | 71° | — | — |
| 2022 | 77° | 59° | 68° | — | — |
| 2021 | 88° | 58° | 73° | — | — |
| 2020 | 97° | 54° | 75° | — | — |
| 2019 | 86° | 53° | 70° | — | — |
| 2018 | 91° | 53° | 72° | — | — |
| 2017 | 87° | 56° | 71° | — | — |
| 2016 | 98° | 48° | 73° | — | — |
| 2015 | 89° | 48° | 69° | — | — |
| 2014 | 86° | 65° | 75° | — | — |
| 2013 | 89° | 60° | 75° | — | — |
| 2012 | 98° | 57° | 78° | — | — |
| 2011 | 94° | 50° | 72° | — | — |
| 2010 | 93° | 51° | 72° | — | — |
| 2009 | 100° | 57° | 79° | — | — |
| 2008 | 92° | 61° | 76° | — | — |
| 2007 | 89° | 51° | 70° | — | — |
| 2006 | 91° | 43° | 67° | — | — |
| 2005 | 87° | 55° | 71° | — | — |
| 2004 | 85° | 62° | 73° | — | — |
| 2003 | 92° | 48° | 70° | — | — |
| 2002 | 92° | 61° | 76° | — | — |
| 2001 | 94° | 51° | 72° | — | — |
| 2000 | 99° | 62° | 80° | — | — |
| 1999 | 90° | 64° | 77° | — | — |
| 1998 | 86° | 62° | 74° | — | — |
| 1997 | 86° | 62° | 74° | — | — |
| 1996 | 81° | 57° | 69° | — | — |
| 1995 | 94° | 52° | 73° | — | — |
| 1994 | 90° | 57° | 73° | — | — |
| 1993 | 81° | 41° | 61° | — | — |
| 1992 | 88° | 65° | 76° | — | — |
| 1991 | 98° | 55° | 77° | — | — |
| 1990 | 82° | 59° | 71° | — | — |
| 1989 | 68° | 49° | 58° | 0.03" | — |
| 1988 | 90° | 57° | 73° | — | — |
| 1987 | 94° | 52° | 73° | — | — |
| 1986 | 73° | 55° | 64° | — | — |
| 1985 | 66° | 49° | 57° | 0.05" | — |
| 1984 | 94° | 63° | 78° | — | — |
| 1983 | 94° | 72° | 83° | — | — |
| 1982 | 78° | 61° | 69° | 0.38" | — |
| 1981 | 96° | 62° | 79° | — | — |
| 1980 | 88° | 65° | 76° | — | — |
| 1979warmest | 96° | 71° | 84° | — | — |
| 1978coldest | 66° | 45° | 55° | — | — |
| 1977 | 81° | 47° | 64° | — | — |
| 1976 | 84° | 51° | 68° | — | — |
| 1975 | 91° | 68° | 80° | — | — |
| 1974 | 95° | 55° | 75° | — | — |
| 1973 | 89° | 54° | 71° | — | — |
| 1972 | 84° | 54° | 69° | — | — |
| 1971 | 82° | 51° | 67° | — | — |
55 years of data from LANCASTER