Weather on May 18
West Covina, CA
55 Years of Data
Avg High
80°F
Avg Low
54°F
Warmest
2008
84°F avg
Coldest
1994
55°F avg
About This Date
May 18th in West Covina, CA typically brings warm spring weather, with average highs around 80°F and lows near 54°F — a 26°F daily swing. Over 55 years of records, the warmest May 18th was in 2008 (84°F average), while the coldest was 1994 (55°F) — a 29°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
Planning for May 18th in West Covina, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 58° | 65° | — | — |
| 2024 | 76° | 54° | 65° | — | — |
| 2023 | 78° | 54° | 66° | — | — |
| 2022 | 82° | 58° | 70° | — | — |
| 2021 | 80° | 56° | 68° | — | — |
| 2020 | 71° | 56° | 63° | — | — |
| 2019 | 76° | 54° | 65° | — | — |
| 2018 | 71° | 58° | 64° | — | — |
| 2017 | 80° | 51° | 66° | — | — |
| 2016 | 80° | 54° | 67° | — | — |
| 2015 | 77° | 53° | 65° | — | — |
| 2014 | 84° | 59° | 72° | — | — |
| 2013 | 84° | 58° | 71° | — | — |
| 2012 | 80° | 55° | 68° | — | — |
| 2011 | 66° | 50° | 58° | — | — |
| 2010 | 74° | 54° | 64° | — | — |
| 2009 | 93° | 57° | 75° | — | — |
| 2008warmest | 104° | 64° | 84° | — | — |
| 2007 | 81° | 55° | 68° | — | — |
| 2006 | 83° | 60° | 71° | — | — |
| 2005 | 84° | 53° | 69° | — | — |
| 2004 | 77° | 57° | 67° | — | — |
| 2003 | 83° | 53° | 68° | — | — |
| 2002 | 72° | 55° | 63° | — | — |
| 2001 | 71° | 54° | 62° | — | — |
| 2000 | 83° | 52° | 67° | — | — |
| 1999 | 77° | 55° | 66° | — | — |
| 1998 | 85° | 47° | 66° | — | — |
| 1997 | 84° | 63° | 73° | — | — |
| 1996 | 85° | 55° | 70° | — | — |
| 1995 | 79° | 53° | 66° | — | — |
| 1994coldest | 64° | 47° | 55° | — | — |
| 1993 | 80° | 55° | 68° | — | — |
| 1992 | 86° | 57° | 72° | — | — |
| 1991 | 72° | 47° | 59° | — | — |
| 1990 | 75° | 52° | 63° | — | — |
| 1989 | 75° | 60° | 68° | — | — |
| 1988 | 79° | 50° | 64° | — | — |
| 1987 | 77° | 60° | 69° | — | — |
| 1986 | 93° | 58° | 75° | — | — |
| 1985 | 77° | 49° | 63° | — | — |
| 1984 | 85° | 52° | 68° | — | — |
| 1983 | 91° | 52° | 71° | — | — |
| 1982 | 84° | 60° | 72° | — | — |
| 1981 | 81° | 52° | 66° | — | — |
| 1980 | 80° | 57° | 69° | — | — |
| 1979 | 76° | 53° | 64° | — | — |
| 1978 | 93° | 53° | 73° | — | — |
| 1977 | 75° | 45° | 60° | — | — |
| 1976 | 85° | 51° | 68° | — | — |
| 1975 | 74° | 53° | 63° | — | — |
| 1974 | 68° | 46° | 57° | — | — |
| 1973 | 79° | 57° | 68° | — | — |
| 1972 | 70° | 49° | 59° | — | — |
| 1971 | 86° | 49° | 67° | — | — |
55 years of data from SANTA FE DAM CALIFORNIA