Weather on September 4
Irvine, CA
55 Years of Data
Avg High
90°F
Avg Low
62°F
Warmest
2022
91°F avg
Coldest
1979
66°F avg
About This Date
September 4th in Irvine, CA typically brings hot fall weather, with average highs around 90°F and lows near 62°F — a 28°F daily swing. Over 55 years of records, the warmest September 4th was in 2022 (91°F average), while the coldest was 1979 (66°F) — a 25°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for September 4th in Irvine, 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° | 66° | 78° | — | — |
| 2024 | 99° | 64° | 81° | — | — |
| 2023 | 77° | 59° | 68° | — | — |
| 2022warmest | 103° | 79° | 91° | — | — |
| 2021 | 90° | 65° | 77° | — | — |
| 2020 | 92° | 61° | 76° | — | — |
| 2019 | 99° | 69° | 84° | — | — |
| 2018 | 85° | 66° | 75° | — | — |
| 2017 | 90° | 68° | 79° | — | — |
| 2016 | 82° | 64° | 73° | — | — |
| 2015 | 83° | 64° | 73° | — | — |
| 2014 | 88° | 65° | 76° | — | — |
| 2013 | 99° | 64° | 81° | — | — |
| 2012 | 98° | 57° | 78° | — | — |
| 2011 | 85° | 50° | 67° | — | — |
| 2010 | 97° | 52° | 74° | — | — |
| 2009 | 97° | 67° | 82° | — | — |
| 2008 | 95° | 61° | 78° | — | — |
| 2007 | 99° | 69° | 84° | — | — |
| 2006 | 99° | 62° | 80° | — | — |
| 2005 | 90° | 54° | 72° | — | — |
| 2004 | 104° | 66° | 85° | — | — |
| 2003 | 95° | 62° | 79° | — | — |
| 2002 | 92° | 64° | 78° | — | — |
| 2001 | 86° | 63° | 74° | — | — |
| 2000 | 81° | 61° | 71° | — | — |
| 1999 | 82° | 62° | 72° | — | — |
| 1998 | 80° | 70° | 75° | — | — |
| 1997 | 105° | 71° | 88° | — | — |
| 1996 | 86° | 66° | 76° | — | — |
| 1995 | 96° | 70° | 83° | — | — |
| 1994 | 89° | 57° | 73° | — | — |
| 1993 | 90° | 58° | 74° | — | — |
| 1992 | 81° | 55° | 68° | — | — |
| 1991 | 80° | 61° | 70° | — | — |
| 1990 | 90° | 54° | 72° | — | — |
| 1989 | 80° | 57° | 69° | — | — |
| 1988 | 108° | 68° | 88° | — | — |
| 1987 | 84° | 63° | 73° | — | — |
| 1986 | 82° | 55° | 69° | — | — |
| 1985 | 71° | 61° | 66° | — | — |
| 1984 | 105° | 68° | 87° | — | — |
| 1983 | 86° | 67° | 76° | — | — |
| 1982 | 95° | 67° | 81° | — | — |
| 1981 | 79° | 62° | 70° | — | — |
| 1980 | 82° | 58° | 70° | — | — |
| 1979coldest | 90° | 43° | 66° | — | — |
| 1978 | 94° | 62° | 78° | — | — |
| 1977 | 87° | 60° | 74° | — | — |
| 1976 | 90° | 64° | 77° | — | — |
| 1975 | 88° | 53° | 70° | — | — |
| 1974 | 89° | 59° | 74° | — | — |
| 1973 | 78° | 60° | 69° | — | — |
| 1972 | 92° | 64° | 78° | — | — |
| 1971 | 85° | 55° | 70° | — | — |
55 years of data from IRVINE RCH