Weather on September 1
Irvine, CA
55 Years of Data
About This Date
September 1st in Irvine, CA typically brings warm fall weather, with average highs around 88°F and lows near 61°F — a 27°F daily swing. Over 55 years of records, the warmest September 1st was in 1995 (89°F average), while the coldest was 1979 (65°F) — a 24°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 Irvine, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 96° | 66° | 81° | — | — |
| 2024 | 86° | 60° | 73° | — | — |
| 2023 | 83° | 60° | 71° | — | — |
| 2022 | 102° | 70° | 86° | — | — |
| 2021 | 77° | 64° | 71° | — | — |
| 2020 | 83° | 60° | 71° | — | — |
| 2019 | 92° | 60° | 76° | — | — |
| 2018 | 85° | 63° | 74° | — | — |
| 2017 | 103° | 66° | 84° | — | — |
| 2016 | 89° | 63° | 76° | — | — |
| 2015 | 87° | 65° | 76° | — | — |
| 2014 | 93° | 61° | 77° | — | — |
| 2013 | 94° | 60° | 77° | — | — |
| 2012 | 91° | 60° | 76° | — | — |
| 2011 | 85° | 53° | 69° | — | — |
| 2010 | 89° | 52° | 70° | — | — |
| 2009 | 98° | 67° | 82° | — | — |
| 2008 | 87° | 61° | 74° | — | — |
| 2007 | 104° | 69° | 87° | — | — |
| 2006 | 97° | 60° | 78° | — | — |
| 2005 | 86° | 59° | 73° | — | — |
| 2004 | 95° | 59° | 77° | — | — |
| 2003 | 86° | 58° | 72° | — | — |
| 2002 | 104° | 66° | 85° | — | — |
| 2001 | 88° | 64° | 76° | — | — |
| 2000 | 77° | 59° | 68° | — | — |
| 1999 | 81° | 62° | 71° | — | — |
| 1998 | 101° | 73° | 87° | — | — |
| 1997 | 98° | 64° | 81° | — | — |
| 1996 | 92° | 65° | 78° | — | — |
| 1995warmest | 95° | 82° | 89° | — | — |
| 1994 | 84° | 66° | 75° | — | — |
| 1993 | 86° | 62° | 74° | — | — |
| 1992 | 79° | 62° | 70° | — | — |
| 1991 | 86° | 58° | 72° | — | — |
| 1990 | 80° | 57° | 69° | — | — |
| 1989 | 85° | 52° | 68° | — | — |
| 1988 | 83° | 60° | 71° | — | — |
| 1987 | 102° | 62° | 82° | — | — |
| 1986 | 81° | 66° | 73° | — | — |
| 1985 | 90° | 64° | 77° | — | — |
| 1984 | 84° | 66° | 75° | — | — |
| 1983 | 91° | 62° | 77° | — | — |
| 1982 | 96° | 57° | 77° | — | — |
| 1981 | 78° | 60° | 69° | — | — |
| 1980 | 84° | — | — | — | — |
| 1979coldest | 87° | 42° | 65° | — | — |
| 1978 | 86° | 64° | 75° | — | — |
| 1977 | 80° | 58° | 69° | — | — |
| 1976 | 89° | 61° | 75° | — | — |
| 1975 | 81° | 51° | 66° | — | — |
| 1974 | 84° | 54° | 69° | — | — |
| 1973 | 77° | 57° | 67° | — | — |
| 1972 | 81° | 65° | 73° | — | — |
| 1971 | 82° | 57° | 70° | — | — |
Irvine, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Irvine, CA Monthly Precipitation
Average rainfall per month, in inches.
Irvine, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Irvine, CA
Irvine, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.