Weather on October 20
Irvine, CA
55 Years of Data
Avg High
80°F
Avg Low
55°F
Warmest
2003
89°F avg
Coldest
1971
58°F avg
About This Date
October 20th in Irvine, CA typically brings warm fall weather, with average highs around 80°F and lows near 55°F — a 25°F daily swing. Over 55 years of records, the warmest October 20th was in 2003 (89°F average), while the coldest was 1971 (58°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 9% of October 20th dates historically, with the wettest October 20th recording 8.38" of rain. The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
Planning for October 20th in Irvine, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 55° | 71° | — | — |
| 2024 | 84° | 56° | 70° | — | — |
| 2023 | 90° | 56° | 73° | — | — |
| 2022 | 92° | 69° | 80° | — | — |
| 2021 | 76° | 50° | 63° | — | — |
| 2020 | 81° | 59° | 70° | — | — |
| 2019 | 80° | 56° | 68° | — | — |
| 2018 | 88° | 60° | 74° | — | — |
| 2017 | 74° | 59° | 66° | — | — |
| 2016 | 102° | 62° | 82° | — | — |
| 2015 | 81° | 58° | 69° | — | — |
| 2014 | 81° | 62° | 71° | — | — |
| 2013 | 87° | 63° | 75° | — | — |
| 2012 | 75° | 56° | 65° | — | — |
| 2011 | 76° | 53° | 64° | — | — |
| 2010 | 66° | 52° | 59° | 0.94" | — |
| 2009 | 78° | 55° | 67° | — | — |
| 2008 | 78° | 49° | 63° | — | — |
| 2007 | 73° | 56° | 64° | — | — |
| 2006 | 87° | 56° | 71° | — | — |
| 2005 | 79° | 55° | 67° | — | — |
| 2004 | 66° | 55° | 61° | 8.38" | — |
| 2003warmest | 100° | 79° | 89° | — | — |
| 2002 | 72° | 52° | 62° | — | — |
| 2001 | 82° | 52° | 67° | — | — |
| 2000 | 72° | 59° | 65° | — | — |
| 1999 | 101° | 52° | 76° | — | — |
| 1998 | 84° | 52° | 68° | — | — |
| 1997 | 82° | 54° | 68° | — | — |
| 1996 | 79° | 58° | 68° | — | — |
| 1995 | 79° | 59° | 69° | — | — |
| 1994 | 79° | 44° | 61° | — | — |
| 1993 | 90° | 45° | 67° | — | — |
| 1992 | 77° | 51° | 64° | — | — |
| 1991 | 77° | 56° | 66° | — | — |
| 1990 | 83° | 50° | 66° | — | — |
| 1989 | 74° | 61° | 67° | — | — |
| 1988 | 73° | 63° | 68° | — | — |
| 1987 | 74° | 51° | 62° | — | — |
| 1986 | 73° | 46° | 60° | — | — |
| 1985 | 75° | 53° | 64° | — | — |
| 1984 | 72° | 58° | 65° | — | — |
| 1983 | 78° | 58° | 68° | — | — |
| 1982 | 77° | 53° | 65° | — | — |
| 1981 | 81° | 52° | 66° | — | — |
| 1980 | 89° | — | — | — | — |
| 1979 | 67° | 56° | 61° | 1.32" | — |
| 1978 | 79° | 46° | 62° | 0.05" | — |
| 1977 | 70° | 51° | 60° | — | — |
| 1976 | 79° | 62° | 70° | — | — |
| 1975 | 70° | 53° | 61° | — | — |
| 1974 | 79° | 56° | 67° | — | — |
| 1973 | 91° | 51° | 71° | — | — |
| 1972 | 62° | 54° | 58° | 0.18" | — |
| 1971coldest | 76° | 40° | 58° | — | — |
55 years of data from IRVINE RCH