Weather on October 18
Irvine, CA
55 Years of Data
Avg High
81°F
Avg Low
54°F
Warmest
2003
86°F avg
Coldest
1971
53°F avg
About This Date
October 18th in Irvine, CA typically brings warm fall weather, with average highs around 81°F and lows near 54°F — a 27°F daily swing. Over 55 years of records, the warmest October 18th was in 2003 (86°F average), while the coldest was 1971 (53°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 4% of October 18th dates historically, with the wettest October 18th recording 0.74" of rain. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for October 18th in Irvine, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 56° | 72° | — | — |
| 2024 | 78° | 55° | 67° | — | — |
| 2023 | 78° | 53° | 66° | — | — |
| 2022 | 89° | 59° | 74° | — | — |
| 2021 | 72° | 58° | 65° | — | — |
| 2020 | 88° | 59° | 73° | — | — |
| 2019 | 82° | 53° | 68° | — | — |
| 2018 | 91° | 58° | 74° | — | — |
| 2017 | 89° | 61° | 75° | — | — |
| 2016 | 80° | 54° | 67° | — | — |
| 2015 | 81° | 67° | 74° | — | — |
| 2014 | 84° | 61° | 72° | — | — |
| 2013 | 87° | 62° | 75° | — | — |
| 2012 | 95° | 67° | 81° | — | — |
| 2011 | 80° | 53° | 67° | — | — |
| 2010 | 60° | 54° | 57° | 0.74" | — |
| 2009 | 91° | 51° | 71° | — | — |
| 2008 | 86° | 54° | 70° | — | — |
| 2007 | 82° | 50° | 66° | — | — |
| 2006 | 83° | 50° | 66° | — | — |
| 2005 | 67° | 50° | 58° | — | — |
| 2004 | 71° | 57° | 64° | — | — |
| 2003warmest | 99° | 74° | 86° | — | — |
| 2002 | 70° | 58° | 64° | — | — |
| 2001 | 90° | 51° | 70° | — | — |
| 2000 | 74° | 55° | 64° | — | — |
| 1999 | 94° | 50° | 72° | — | — |
| 1998 | 87° | 54° | 70° | — | — |
| 1997 | 89° | 50° | 70° | — | — |
| 1996 | 80° | 57° | 69° | — | — |
| 1995 | 74° | 62° | 68° | — | — |
| 1994 | 81° | 42° | 61° | — | — |
| 1993 | 75° | 45° | 60° | — | — |
| 1992 | 75° | 55° | 65° | — | — |
| 1991 | 86° | 51° | 69° | — | — |
| 1990 | 79° | 56° | 67° | — | — |
| 1989 | 89° | 53° | 71° | — | — |
| 1988 | 79° | 57° | 68° | — | — |
| 1987 | 67° | 63° | 65° | — | — |
| 1986 | 73° | 48° | 61° | — | — |
| 1985 | 78° | 58° | 68° | — | — |
| 1984 | 76° | 46° | 61° | — | — |
| 1983 | 80° | 53° | 67° | — | — |
| 1982 | 77° | 48° | 63° | — | — |
| 1981 | 93° | — | — | — | — |
| 1980 | — | 39° | — | — | — |
| 1979 | 75° | 59° | 67° | — | — |
| 1978 | 81° | 53° | 67° | — | — |
| 1977 | 80° | 58° | 69° | — | — |
| 1976 | 80° | 61° | 70° | — | — |
| 1975 | 78° | 46° | 62° | — | — |
| 1974 | 92° | 52° | 72° | — | — |
| 1973 | 92° | 48° | 70° | — | — |
| 1972 | 76° | 54° | 65° | 0.05" | — |
| 1971coldest | 64° | 41° | 53° | — | — |
55 years of data from IRVINE RCH