Weather on December 18
West Covina, CA
55 Years of Data
Avg High
70°F
Avg Low
47°F
Warmest
2009
72°F avg
Coldest
1984
48°F avg
About This Date
December 18th in West Covina, CA typically brings pleasant winter weather, with average highs around 70°F and lows near 47°F. Over 54 years of records, the warmest December 18th was in 2009 (72°F average), while the coldest was 1984 (48°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 9% of December 18th dates historically, with the wettest December 18th recording 2.16" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for December 18th in West Covina, CA? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 50° | 66° | — | — |
| 2024 | 83° | 54° | 68° | — | — |
| 2023 | 68° | 58° | 63° | — | — |
| 2022 | 67° | 48° | 57° | — | — |
| 2021 | 72° | 49° | 61° | — | — |
| 2020 | 70° | 45° | 57° | — | — |
| 2019 | 64° | 49° | 56° | — | — |
| 2018 | 70° | 53° | 61° | — | — |
| 2017 | 72° | 52° | 62° | — | — |
| 2015 | 75° | 50° | 63° | — | — |
| 2014 | 69° | 51° | 60° | — | — |
| 2013 | 85° | 60° | 72° | — | — |
| 2012 | 64° | 44° | 54° | — | — |
| 2011 | 66° | 46° | 56° | — | — |
| 2010 | 58° | 54° | 56° | — | — |
| 2009warmest | 84° | 59° | 72° | — | — |
| 2008 | 59° | 38° | 48° | — | — |
| 2007 | 55° | 51° | 53° | — | — |
| 2006 | 62° | 36° | 49° | — | — |
| 2005 | 65° | 48° | 56° | — | — |
| 2004 | 81° | 56° | 68° | — | — |
| 2003 | 82° | 55° | 69° | — | — |
| 2002 | 63° | 40° | 51° | — | — |
| 2001 | 73° | 49° | 61° | — | — |
| 2000 | 76° | 61° | 68° | — | — |
| 1999 | 78° | 50° | 64° | — | — |
| 1998 | 67° | 48° | 57° | — | — |
| 1997 | 60° | 45° | 52° | — | — |
| 1996 | 70° | 70° | 70° | — | — |
| 1995 | 69° | 47° | 58° | — | — |
| 1994 | 68° | 42° | 55° | — | — |
| 1993 | 67° | 43° | 55° | — | — |
| 1992 | 62° | 40° | 51° | 0.79" | — |
| 1991 | 67° | 51° | 59° | — | — |
| 1990 | 65° | 35° | 50° | — | — |
| 1989 | 65° | 42° | 53° | — | — |
| 1988 | 58° | 44° | 51° | 0.33" | — |
| 1987 | 68° | 37° | 53° | — | — |
| 1986 | 69° | 44° | 57° | — | — |
| 1985 | 85° | 42° | 63° | — | — |
| 1984coldest | 57° | 39° | 48° | 1.7" | — |
| 1983 | 70° | 45° | 57° | — | — |
| 1982 | 75° | 37° | 56° | — | — |
| 1981 | 76° | 45° | 60° | — | — |
| 1980 | 74° | 53° | 63° | — | — |
| 1979 | 80° | 43° | 61° | — | — |
| 1978 | 56° | 47° | 51° | 2.16" | — |
| 1977 | 65° | 48° | 56° | 2.03" | — |
| 1976 | 71° | 38° | 54° | — | — |
| 1975 | 75° | 35° | 55° | — | — |
| 1974 | 77° | 40° | 58° | — | — |
| 1973 | 73° | 43° | 58° | — | — |
| 1972 | 80° | 49° | 64° | — | — |
| 1971 | 64° | 41° | 53° | — | — |
54 years of data from SANTA FE DAM CALIFORNIA