Weather on September 1
Norwalk, CA
55 Years of Data
Avg High
86°F
Avg Low
66°F
Warmest
1998
89°F avg
Coldest
1973
68°F avg
About This Date
September 1st in Norwalk, CA typically brings warm fall weather, with average highs around 86°F and lows near 66°F. Over 55 years of records, the warmest September 1st was in 1998 (89°F average), while the coldest was 1973 (68°F) — a 21°F range across recorded history. This date has historically been dry, with little recorded precipitation. 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 1st in Norwalk, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 69° | 79° | — | — |
| 2024 | 84° | 66° | 75° | — | — |
| 2023 | 83° | 69° | 76° | — | — |
| 2022 | 93° | 72° | 82° | — | — |
| 2021 | 77° | 67° | 72° | — | — |
| 2020 | 82° | 65° | 73° | — | — |
| 2019 | 87° | 69° | 78° | — | — |
| 2018 | 80° | 68° | 74° | — | — |
| 2017 | 106° | 73° | 89° | — | — |
| 2016 | 83° | 67° | 75° | — | — |
| 2015 | 82° | 70° | 76° | — | — |
| 2014 | 85° | 69° | 77° | — | — |
| 2013 | 96° | 76° | 86° | — | — |
| 2012 | 94° | 65° | 79° | — | — |
| 2011 | 83° | 63° | 73° | — | — |
| 2010 | 83° | 60° | 71° | — | — |
| 2009 | 93° | 72° | 82° | — | — |
| 2008 | 81° | 68° | 74° | — | — |
| 2007 | 101° | 73° | 87° | — | — |
| 2006 | 94° | 64° | 79° | — | — |
| 2005 | 82° | 59° | 71° | — | — |
| 2004 | 92° | 63° | 77° | — | — |
| 2003 | 82° | 65° | 73° | — | — |
| 2002 | 105° | 69° | 87° | — | — |
| 2001 | 86° | 63° | 74° | — | — |
| 2000 | 77° | 64° | 71° | — | — |
| 1999 | 75° | 63° | 69° | — | — |
| 1998warmest | 106° | 73° | 89° | — | — |
| 1997 | 92° | 69° | 80° | — | — |
| 1996 | 81° | 66° | 73° | — | — |
| 1995 | 93° | 65° | 79° | — | — |
| 1994 | 79° | 65° | 72° | — | — |
| 1993 | 85° | 65° | 75° | — | — |
| 1992 | 78° | 66° | 72° | — | — |
| 1991 | 82° | 63° | 72° | — | — |
| 1990 | 80° | 62° | 71° | — | — |
| 1989 | 85° | 61° | 73° | — | — |
| 1988 | 84° | 63° | 73° | — | — |
| 1987 | 97° | 64° | 80° | — | — |
| 1986 | 76° | 65° | 70° | — | — |
| 1985 | 83° | 68° | 75° | — | — |
| 1984 | 78° | 69° | 74° | — | — |
| 1983 | 91° | 68° | 80° | — | — |
| 1982 | 100° | 66° | 83° | — | — |
| 1981 | 78° | 63° | 70° | — | — |
| 1980 | 78° | 65° | 71° | — | — |
| 1979 | 82° | 62° | 72° | — | — |
| 1978 | 80° | 64° | 72° | — | — |
| 1977 | 79° | 66° | 72° | — | — |
| 1976 | 80° | 69° | 75° | — | — |
| 1975 | 80° | 63° | 71° | — | — |
| 1974 | 90° | 61° | 75° | — | — |
| 1973coldest | 75° | 61° | 68° | — | — |
| 1972 | 78° | 66° | 72° | — | — |
| 1971 | 81° | 65° | 73° | — | — |
55 years of data from FULLERTON MUNI AP