Weather on May 21
El Monte, CA
55 Years of Data
Avg High
78°F
Avg Low
55°F
Warmest
1988
76°F avg
Coldest
1972
56°F avg
About This Date
May 21st in El Monte, CA typically brings pleasant spring weather, with average highs around 78°F and lows near 55°F. Over 55 years of records, the warmest May 21st was in 1988 (76°F average), while the coldest was 1972 (56°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 21st dates historically. 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 21st in El Monte, CA? Great weather for outdoor activities.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 60° | 76° | — | — |
| 2024 | 74° | 53° | 63° | — | — |
| 2023 | 83° | 57° | 70° | — | — |
| 2022 | 70° | 56° | 63° | — | — |
| 2021 | 72° | 49° | 60° | — | — |
| 2020 | 88° | 56° | 72° | — | — |
| 2019 | 66° | 51° | 59° | — | — |
| 2018 | 61° | 55° | 58° | — | — |
| 2017 | 91° | 58° | 74° | — | — |
| 2016 | 69° | 50° | 60° | — | — |
| 2015 | 72° | 53° | 62° | — | — |
| 2014 | 72° | 55° | 63° | — | — |
| 2013 | 83° | 62° | 72° | — | — |
| 2012 | 85° | 60° | 72° | — | — |
| 2011 | 82° | 50° | 66° | — | — |
| 2010 | 75° | 51° | 63° | — | — |
| 2009 | 79° | 60° | 69° | — | — |
| 2008 | 83° | 61° | 72° | — | — |
| 2007 | 63° | — | — | — | — |
| 2006 | 68° | 62° | 65° | — | — |
| 2005 | 92° | 60° | 76° | — | — |
| 2004 | 75° | 57° | 66° | — | — |
| 2003 | 95° | 54° | 74° | — | — |
| 2002 | 73° | 46° | 60° | 0.05" | — |
| 2001 | 78° | 61° | 69° | — | — |
| 2000 | 92° | 59° | 75° | — | — |
| 1999 | 68° | 58° | 63° | — | — |
| 1998 | 74° | 55° | 64° | — | — |
| 1997 | 79° | 64° | 71° | — | — |
| 1996 | 78° | 54° | 66° | — | — |
| 1995 | 75° | 54° | 64° | — | — |
| 1994 | 80° | 55° | 68° | — | — |
| 1993 | 78° | 60° | 69° | — | — |
| 1992 | 79° | 59° | 69° | — | — |
| 1991 | 74° | 55° | 64° | — | — |
| 1990 | 79° | 53° | 66° | — | — |
| 1989 | 83° | 52° | 67° | — | — |
| 1988warmest | 93° | 59° | 76° | — | — |
| 1987 | 71° | 49° | 60° | — | — |
| 1986 | 78° | 60° | 69° | — | — |
| 1985 | 79° | 56° | 67° | — | — |
| 1984 | 80° | 59° | 70° | — | — |
| 1983 | 83° | 58° | 70° | — | — |
| 1982 | 74° | 60° | 67° | — | — |
| 1981 | 76° | 48° | 62° | — | — |
| 1980 | 66° | 55° | 61° | 0.18" | — |
| 1979 | 75° | 60° | 68° | — | — |
| 1978 | 78° | 55° | 67° | — | — |
| 1977 | 82° | 50° | 66° | — | — |
| 1976 | 76° | 57° | 66° | — | — |
| 1975 | 69° | 43° | 56° | — | — |
| 1974 | 87° | 48° | 68° | — | — |
| 1973 | 75° | 57° | 66° | — | — |
| 1972coldest | 70° | 42° | 56° | — | — |
| 1971 | 74° | 52° | 63° | — | — |
55 years of data from SAN GABRIEL FIRE DEPT