Weather on December 15
El Monte, CA
55 Years of Data
Avg High
69°F
Avg Low
44°F
Warmest
2017
71°F avg
Coldest
1987
44°F avg
About This Date
December 15th in El Monte, CA typically brings mild winter weather, with average highs around 69°F and lows near 44°F — a 25°F daily swing. Over 55 years of records, the warmest December 15th was in 2017 (71°F average), while the coldest was 1987 (44°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 5% of December 15th dates historically, with the wettest December 15th recording 3.1" of rain. The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for December 15th in El Monte, CA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 53° | 61° | — | — |
| 2024 | 67° | 49° | 58° | — | — |
| 2023 | 78° | 59° | 69° | — | — |
| 2022 | 61° | 48° | 54° | — | — |
| 2021 | 57° | 40° | 48° | — | — |
| 2020 | 70° | 53° | 61° | — | — |
| 2019 | 64° | 49° | 56° | — | — |
| 2018 | 74° | 58° | 66° | — | — |
| 2017warmest | 81° | 61° | 71° | — | — |
| 2016 | 73° | 51° | 62° | — | — |
| 2015 | 59° | 43° | 51° | — | — |
| 2014 | 65° | 46° | 55° | — | — |
| 2013 | 84° | 44° | 64° | — | — |
| 2012 | 61° | 44° | 52° | — | — |
| 2011 | 60° | 45° | 52° | — | — |
| 2010 | 58° | 49° | 53° | — | — |
| 2009 | 72° | 43° | 57° | — | — |
| 2008 | 51° | 44° | 48° | 3.1" | — |
| 2007 | 70° | 41° | 55° | — | — |
| 2006 | 65° | 48° | 56° | — | — |
| 2005 | 65° | 46° | 55° | — | — |
| 2004 | 79° | 61° | 70° | — | — |
| 2003 | 69° | 43° | 56° | — | — |
| 2002 | 67° | 53° | 60° | — | — |
| 2001 | 61° | 42° | 51° | — | — |
| 2000 | 64° | 42° | 53° | — | — |
| 1999 | 76° | 38° | 57° | — | — |
| 1998 | 84° | 45° | 64° | — | — |
| 1997 | 71° | 44° | 58° | — | — |
| 1996 | 75° | 40° | 57° | — | — |
| 1995 | 72° | 46° | 59° | — | — |
| 1994 | 67° | 40° | 53° | — | — |
| 1993 | 64° | 35° | 50° | 0.64" | — |
| 1992 | 62° | 35° | 49° | — | — |
| 1991 | 79° | 42° | 60° | — | — |
| 1990 | 65° | 36° | 50° | — | — |
| 1989 | 74° | 42° | 58° | — | — |
| 1988 | 52° | 57° | 54° | 2.16" | — |
| 1987coldest | 55° | 32° | 44° | — | — |
| 1986 | 69° | 42° | 56° | — | — |
| 1985 | 76° | 41° | 58° | — | — |
| 1984 | 59° | 35° | 47° | — | — |
| 1983 | 73° | 44° | 59° | — | — |
| 1982 | 69° | 39° | 54° | — | — |
| 1981 | 78° | 44° | 61° | — | — |
| 1980 | 85° | 39° | 62° | — | — |
| 1979 | 80° | 37° | 59° | — | — |
| 1978 | 73° | 39° | 56° | — | — |
| 1977 | 72° | 46° | 59° | — | — |
| 1976 | 87° | 40° | 63° | — | — |
| 1975 | 73° | 31° | 52° | — | — |
| 1974 | 74° | 41° | 57° | — | — |
| 1973 | 79° | 41° | 60° | — | — |
| 1972 | 66° | 33° | 50° | — | — |
| 1971 | 61° | 37° | 49° | — | — |
55 years of data from SAN GABRIEL FIRE DEPT