Weather on March 18
Irvine, CA
55 Years of Data
Avg High
72°F
Avg Low
47°F
Warmest
2026
85°F avg
Coldest
2006
47°F avg
About This Date
March 18th in Irvine, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 47°F — a 25°F daily swing. Over 56 years of records, the warmest March 18th was in 2026 (85°F average), while the coldest was 2006 (47°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 4% of March 18th dates historically, with the wettest March 18th recording 4.78" of rain. The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
Planning for March 18th in Irvine, CA? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 91° | 78° | 85° | — | — |
| 2025 | 69° | 43° | 56° | — | — |
| 2024 | 76° | 49° | 62° | — | — |
| 2023 | 75° | 47° | 61° | — | — |
| 2022 | 82° | 52° | 67° | — | — |
| 2021 | 69° | 45° | 57° | — | — |
| 2020 | 61° | 42° | 51° | — | — |
| 2019 | 84° | 52° | 68° | — | — |
| 2018 | 66° | 47° | 56° | — | — |
| 2017 | 76° | 51° | 63° | — | — |
| 2016 | 79° | 60° | 69° | — | — |
| 2015 | 74° | 56° | 65° | — | — |
| 2014 | 78° | 61° | 69° | — | — |
| 2013 | 73° | 49° | 61° | — | — |
| 2012 | 58° | 38° | 48° | — | — |
| 2011 | 73° | 41° | 57° | — | — |
| 2010 | 83° | 50° | 66° | — | — |
| 2009 | 88° | 49° | 68° | — | — |
| 2008 | 76° | 43° | 59° | — | — |
| 2007 | 63° | 47° | 55° | — | — |
| 2006coldest | 55° | 40° | 47° | — | — |
| 2005 | 66° | 49° | 57° | — | — |
| 2004 | 79° | 51° | 65° | — | — |
| 2003 | 71° | 42° | 57° | — | — |
| 2002 | 62° | 40° | 51° | — | — |
| 2001 | 78° | 46° | 62° | — | — |
| 2000 | 78° | 48° | 63° | — | — |
| 1999 | 70° | 47° | 58° | — | — |
| 1998 | 78° | 53° | 66° | — | — |
| 1997 | 88° | 46° | 67° | — | — |
| 1996 | 73° | 55° | 64° | — | — |
| 1995 | 70° | 52° | 61° | — | — |
| 1994 | 80° | 52° | 66° | — | — |
| 1993 | 73° | 54° | 63° | — | — |
| 1992 | 66° | 44° | 55° | — | — |
| 1991 | 70° | 47° | 58° | — | — |
| 1990 | 79° | 41° | 60° | — | — |
| 1989 | 70° | 42° | 56° | — | — |
| 1988 | 86° | 40° | 63° | — | — |
| 1987 | 68° | 44° | 56° | — | — |
| 1986 | 62° | 41° | 52° | — | — |
| 1985 | 57° | 41° | 49° | — | — |
| 1984 | 82° | 48° | 65° | — | — |
| 1983 | 55° | 50° | 53° | 1.12" | — |
| 1982 | 55° | 42° | 49° | 4.78" | — |
| 1981 | 72° | 45° | 58° | — | — |
| 1980 | 62° | 44° | 53° | — | — |
| 1979 | 63° | 48° | 55° | — | — |
| 1978 | 93° | 49° | 71° | — | — |
| 1977 | 62° | 37° | 50° | — | — |
| 1976 | 82° | 44° | 63° | — | — |
| 1975 | 65° | 38° | 51° | — | — |
| 1974 | 77° | 48° | 63° | — | — |
| 1973 | 64° | 48° | 56° | — | — |
| 1972 | 65° | 50° | 57° | — | — |
| 1971 | 79° | 45° | 62° | — | — |
56 years of data from IRVINE RCH