Weather on December 20
El Monte, CA
55 Years of Data
Avg High
69°F
Avg Low
44°F
Warmest
2020
72°F avg
Coldest
1990
47°F avg
About This Date
December 20th 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 20th was in 2020 (72°F average), while the coldest was 1990 (47°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 5% of December 20th dates historically, with the wettest December 20th recording 3.38" of rain. The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in El Monte, CA? Great weather for outdoor activities.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 52° | 59° | — | — |
| 2024 | 73° | 54° | 63° | — | — |
| 2023 | 62° | 56° | 59° | — | — |
| 2022 | 67° | 52° | 59° | — | — |
| 2021 | 64° | 48° | 56° | — | — |
| 2020warmest | 82° | 63° | 72° | — | — |
| 2019 | 73° | 56° | 64° | — | — |
| 2018 | 77° | 57° | 67° | — | — |
| 2017 | 56° | 48° | 52° | — | — |
| 2016 | 68° | 40° | 54° | — | — |
| 2015 | 62° | 44° | 53° | — | — |
| 2014 | 63° | 49° | 56° | — | — |
| 2013 | 63° | 44° | 53° | — | — |
| 2012 | 68° | 40° | 54° | — | — |
| 2011 | 68° | 46° | 57° | — | — |
| 2010 | 57° | 50° | 54° | — | — |
| 2009 | 73° | 50° | 62° | — | — |
| 2008 | 63° | 36° | 49° | — | — |
| 2007 | 58° | 47° | 52° | 0.18" | — |
| 2006 | 62° | 37° | 50° | — | — |
| 2005 | 80° | 52° | 66° | — | — |
| 2004 | 72° | 50° | 61° | — | — |
| 2003 | 79° | 57° | 68° | — | — |
| 2002 | 59° | 46° | 53° | 3.38" | — |
| 2001 | 65° | 43° | 54° | — | — |
| 2000 | 76° | 39° | 57° | — | — |
| 1999 | 82° | 45° | 63° | — | — |
| 1998 | 59° | 46° | 53° | — | — |
| 1997 | 73° | 43° | 58° | — | — |
| 1996 | 73° | 37° | 55° | — | — |
| 1995 | 67° | 45° | 56° | — | — |
| 1994 | 81° | 40° | 60° | — | — |
| 1993 | 70° | 39° | 54° | — | — |
| 1992 | 65° | 32° | 48° | — | — |
| 1991 | 75° | 42° | 59° | — | — |
| 1990coldest | 58° | 37° | 47° | — | — |
| 1989 | 71° | 40° | 55° | — | — |
| 1988 | 57° | 43° | 50° | — | — |
| 1987 | 68° | 36° | 52° | — | — |
| 1986 | 68° | 47° | 57° | — | — |
| 1985 | 85° | 44° | 64° | — | — |
| 1984 | 61° | 40° | 50° | 0.94" | — |
| 1983 | 65° | 47° | 56° | — | — |
| 1982 | 71° | 39° | 55° | — | — |
| 1981 | 70° | 49° | 59° | — | — |
| 1980 | 72° | 43° | 57° | — | — |
| 1979 | 68° | 39° | 54° | — | — |
| 1978 | 64° | 32° | 48° | — | — |
| 1977 | 68° | 41° | 55° | — | — |
| 1976 | 74° | 40° | 57° | — | — |
| 1975 | 72° | 37° | 54° | — | — |
| 1974 | 75° | 40° | 57° | — | — |
| 1973 | 75° | 41° | 58° | — | — |
| 1972 | 81° | 46° | 63° | — | — |
| 1971 | 63° | 35° | 49° | — | — |
55 years of data from SAN GABRIEL FIRE DEPT