Weather on May 18
Murrieta, CA
55 Years of Data
Avg High
77°F
Avg Low
52°F
Warmest
2008
82°F avg
Coldest
1994
51°F avg
About This Date
May 18th in Murrieta, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 52°F — a 25°F daily swing. Over 53 years of records, the warmest May 18th was in 2008 (82°F average), while the coldest was 1994 (51°F) — a 31°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.9°F cooler on this date compared to 20-30 years ago.
Planning for May 18th in Murrieta, CA? Great weather for outdoor activities.
Cooling Trend
1.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 50° | 58° | — | — |
| 2024 | 72° | 52° | 62° | — | — |
| 2023 | 67° | 53° | 60° | — | — |
| 2022 | 74° | 50° | 62° | — | — |
| 2021 | 71° | 53° | 62° | — | — |
| 2020 | 68° | 51° | 60° | — | — |
| 2019 | 69° | 47° | 58° | — | — |
| 2018 | 68° | 50° | 59° | — | — |
| 2017 | 74° | 49° | 61° | — | — |
| 2016 | 76° | 53° | 64° | — | — |
| 2015 | 66° | 48° | 57° | — | — |
| 2014 | 76° | 54° | 65° | — | — |
| 2013 | 71° | 53° | 62° | — | — |
| 2012 | 70° | 50° | 60° | — | — |
| 2011 | 57° | 47° | 52° | — | — |
| 2010 | 67° | 48° | 57° | — | — |
| 2009 | 85° | 54° | 69° | — | — |
| 2008warmest | 93° | 71° | 82° | — | — |
| 2007 | 82° | 48° | 65° | — | — |
| 2006 | 72° | 55° | 63° | — | — |
| 2005 | 75° | 51° | 63° | — | — |
| 2004 | 74° | 53° | 63° | — | — |
| 2003 | 72° | 51° | 61° | — | — |
| 2002 | 68° | 52° | 60° | — | — |
| 2001 | 72° | 54° | 63° | — | — |
| 2000 | 81° | 52° | 66° | — | — |
| 1999 | 77° | 49° | 63° | — | — |
| 1998 | 78° | 52° | 65° | — | — |
| 1997 | 74° | 56° | 65° | — | — |
| 1996 | 79° | 54° | 66° | — | — |
| 1995 | 75° | 51° | 63° | — | — |
| 1994coldest | 60° | 43° | 51° | — | — |
| 1993 | 85° | 57° | 71° | — | — |
| 1992 | 90° | 53° | 71° | — | — |
| 1991 | 77° | 47° | 62° | — | — |
| 1990 | 81° | 74° | 77° | — | — |
| 1989 | 83° | 54° | 68° | — | — |
| 1988 | 86° | 54° | 70° | — | — |
| 1987 | 80° | 60° | 70° | — | — |
| 1986 | 98° | 55° | 77° | — | — |
| 1985 | 83° | 46° | 64° | — | — |
| 1984 | — | 53° | — | — | — |
| 1983 | 89° | 47° | 68° | — | — |
| 1982 | 87° | 53° | 70° | — | — |
| 1981 | — | 48° | — | — | — |
| 1979 | 81° | 51° | 66° | — | — |
| 1978 | 91° | 45° | 68° | — | — |
| 1977 | 75° | 41° | 58° | — | — |
| 1976 | 90° | 51° | 70° | — | — |
| 1975 | 72° | 51° | 61° | — | — |
| 1974 | 69° | 45° | 57° | — | — |
| 1973 | 91° | 51° | 71° | — | — |
| 1972 | 72° | 48° | 60° | — | — |
53 years of data from SANTA ROSA PLATEAU CALIFORNIA