Weather on August 18
Irvine, CA
55 Years of Data
Avg High
86°F
Avg Low
62°F
Warmest
2020
88°F avg
Coldest
1979
62°F avg
About This Date
August 18th in Irvine, CA typically brings warm summer weather, with average highs around 86°F and lows near 62°F. Over 55 years of records, the warmest August 18th was in 2020 (88°F average), while the coldest was 1979 (62°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 18th dates historically, with the wettest August 18th recording 2.44" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Irvine, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 64° | 76° | — | — |
| 2024 | 90° | 63° | 76° | — | — |
| 2023 | 84° | 58° | 71° | — | — |
| 2022 | 90° | 65° | 77° | — | — |
| 2021 | 84° | 69° | 77° | — | — |
| 2020warmest | 107° | 69° | 88° | — | — |
| 2019 | 85° | 60° | 72° | — | — |
| 2018 | 90° | 68° | 79° | — | — |
| 2017 | 85° | 63° | 74° | — | — |
| 2016 | 92° | 62° | 77° | — | — |
| 2015 | 89° | 68° | 79° | — | — |
| 2014 | 91° | 67° | 79° | — | — |
| 2013 | 94° | 55° | 74° | — | — |
| 2012 | 96° | 67° | 81° | — | — |
| 2011 | 89° | 54° | 71° | — | — |
| 2010 | 99° | 64° | 81° | — | — |
| 2009 | 83° | 59° | 71° | — | — |
| 2008 | 89° | 58° | 73° | — | — |
| 2007 | 96° | 63° | 79° | — | — |
| 2006 | 88° | 59° | 73° | — | — |
| 2005 | 86° | 52° | 69° | — | — |
| 2004 | 86° | 62° | 74° | — | — |
| 2003 | 91° | 62° | 77° | — | — |
| 2002 | 80° | 56° | 68° | — | — |
| 2001 | 88° | 62° | 75° | — | — |
| 2000 | 89° | 64° | 77° | — | — |
| 1999 | 87° | 61° | 74° | — | — |
| 1998 | 89° | 65° | 77° | — | — |
| 1997 | 98° | 60° | 79° | — | — |
| 1996 | 84° | 69° | 77° | — | — |
| 1995 | 87° | 63° | 75° | — | — |
| 1994 | 91° | 68° | 80° | — | — |
| 1993 | 82° | 58° | 70° | — | — |
| 1992 | 93° | 63° | 78° | — | — |
| 1991 | 81° | 62° | 71° | — | — |
| 1990 | 79° | 66° | 72° | — | — |
| 1989 | 80° | 60° | 70° | — | — |
| 1988 | 79° | 61° | 70° | — | — |
| 1987 | 80° | 58° | 69° | — | — |
| 1986 | 92° | 56° | 74° | — | — |
| 1985 | 82° | 65° | 73° | — | — |
| 1984 | 82° | 71° | 77° | — | — |
| 1983 | 74° | 70° | 72° | — | — |
| 1982 | 83° | 54° | 68° | — | — |
| 1981 | 80° | 66° | 73° | — | — |
| 1980 | 74° | 63° | 68° | — | — |
| 1979coldest | 71° | 53° | 62° | — | — |
| 1978 | 80° | 53° | 67° | — | — |
| 1977 | 73° | 67° | 70° | 2.44" | — |
| 1976 | 78° | 54° | 66° | — | — |
| 1975 | 78° | 56° | 67° | — | — |
| 1974 | 85° | 54° | 69° | — | — |
| 1973 | 81° | 61° | 71° | — | — |
| 1972 | 78° | 58° | 68° | — | — |
| 1971 | 83° | 59° | 71° | — | — |
55 years of data from IRVINE RCH