Weather on March 18
Fullerton, CA
55 Years of Data
Avg High
73°F
Avg Low
49°F
Warmest
2026
77°F avg
Coldest
1982
48°F avg
About This Date
March 18th in Fullerton, CA typically brings pleasant spring weather, with average highs around 73°F and lows near 49°F. Over 56 years of records, the warmest March 18th was in 2026 (77°F average), while the coldest was 1982 (48°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 16% of March 18th dates historically, with the wettest March 18th recording 2.24" of rain. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
Planning for March 18th in Fullerton, CA? Great weather for outdoor activities.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 92° | 62° | 77° | — | — |
| 2025 | 68° | 46° | 57° | — | — |
| 2024 | 74° | 51° | 62° | 0.23" | — |
| 2023 | 82° | 52° | 67° | — | — |
| 2022 | 81° | 54° | 67° | — | — |
| 2021 | 73° | 49° | 61° | — | — |
| 2020 | 62° | 44° | 53° | — | — |
| 2019 | 85° | 54° | 69° | — | — |
| 2018 | 66° | 47° | 56° | — | — |
| 2017 | 82° | 57° | 70° | — | — |
| 2016 | 79° | 58° | 68° | — | — |
| 2015 | 73° | 59° | 66° | — | — |
| 2014 | 76° | 55° | 65° | — | — |
| 2013 | 70° | 54° | 62° | — | — |
| 2012 | 55° | 44° | 50° | 0.25" | — |
| 2011 | 73° | 46° | 60° | — | — |
| 2010 | 88° | 53° | 70° | — | — |
| 2009 | 83° | 51° | 67° | — | — |
| 2008 | 74° | 45° | 59° | — | — |
| 2007 | 69° | 55° | 62° | — | — |
| 2006 | 61° | 43° | 52° | — | — |
| 2005 | 67° | 55° | 61° | 0.05" | — |
| 2004 | 77° | 57° | 67° | — | — |
| 2003 | 75° | 45° | 60° | — | — |
| 2002 | 69° | 37° | 53° | 0.18" | — |
| 2001 | 82° | 50° | 66° | — | — |
| 2000 | 81° | 50° | 65° | — | — |
| 1999 | 64° | 47° | 55° | — | — |
| 1998 | 75° | 54° | 64° | — | — |
| 1997 | 85° | 50° | 67° | — | — |
| 1996 | 73° | 56° | 64° | — | — |
| 1995 | 71° | 59° | 65° | — | — |
| 1994 | 75° | 53° | 64° | — | — |
| 1993 | 72° | 56° | 64° | — | — |
| 1992 | 67° | 48° | 57° | — | — |
| 1991 | 71° | 49° | 60° | 1.17" | — |
| 1990 | 78° | 46° | 62° | — | — |
| 1989 | 73° | 47° | 60° | — | — |
| 1988 | 85° | 48° | 66° | — | — |
| 1987 | 67° | 49° | 58° | — | — |
| 1986 | 74° | 45° | 59° | — | — |
| 1985 | 66° | 46° | 56° | 0.33" | — |
| 1984 | 81° | 49° | 65° | — | — |
| 1983 | 63° | 49° | 56° | 1.65" | — |
| 1982coldest | 59° | 38° | 48° | 2.24" | — |
| 1981 | 73° | 44° | 59° | — | — |
| 1980 | 71° | 46° | 59° | — | — |
| 1979 | 60° | 43° | 51° | 0.08" | — |
| 1978 | 82° | 59° | 71° | — | — |
| 1977 | 68° | 37° | 53° | — | — |
| 1976 | 70° | 47° | 58° | — | — |
| 1975 | 73° | 40° | 56° | — | — |
| 1974 | 70° | 45° | 57° | — | — |
| 1973 | 66° | 44° | 55° | — | — |
| 1972 | 67° | 49° | 58° | — | — |
| 1971 | 72° | 44° | 58° | — | — |
56 years of data from ANAHEIM