Weather on March 21
El Monte, CA
55 Years of Data
Avg High
72°F
Avg Low
49°F
Warmest
2026
73°F avg
Coldest
2011
48°F avg
About This Date
March 21st in El Monte, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 49°F. Over 56 years of records, the warmest March 21st was in 2026 (73°F average), while the coldest was 2011 (48°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 14% of March 21st dates historically, with the wettest March 21st recording 2.9" of rain. The last decade has been 3.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.6°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in El Monte, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 84° | 63° | 73° | — | — |
| 2025 | 76° | 53° | 64° | — | — |
| 2024 | 72° | 53° | 62° | — | — |
| 2023 | 55° | 44° | 50° | — | — |
| 2022 | 77° | 51° | 64° | — | — |
| 2021 | 68° | 47° | 57° | — | — |
| 2020 | 69° | 49° | 59° | — | — |
| 2019 | 57° | 48° | 53° | — | — |
| 2018 | 65° | 54° | 59° | — | — |
| 2017 | 65° | 51° | 58° | — | — |
| 2016 | 68° | 52° | 60° | — | — |
| 2015 | 77° | — | — | — | — |
| 2014 | 69° | 55° | 62° | — | — |
| 2013 | 73° | 51° | 62° | — | — |
| 2012 | 78° | 46° | 62° | — | — |
| 2011coldest | 55° | 41° | 48° | — | — |
| 2010 | 84° | 51° | 68° | — | — |
| 2009 | 62° | 54° | 58° | — | — |
| 2008 | 82° | 46° | 64° | — | — |
| 2007 | 63° | 53° | 58° | 0.03" | — |
| 2006 | 59° | 42° | 51° | — | — |
| 2005 | 69° | 47° | 58° | — | — |
| 2004 | 77° | 56° | 66° | — | — |
| 2003 | 83° | 45° | 64° | — | — |
| 2002 | 83° | 49° | 66° | — | — |
| 2001 | 74° | 59° | 66° | — | — |
| 2000 | 75° | 54° | 64° | — | — |
| 1999 | 68° | 47° | 57° | — | — |
| 1998 | 72° | 49° | 60° | — | — |
| 1997 | 85° | 49° | 67° | — | — |
| 1996 | 79° | 56° | 67° | — | — |
| 1995 | 66° | 50° | 58° | 1.4" | — |
| 1994 | 76° | 48° | 62° | — | — |
| 1993 | 78° | 55° | 67° | — | — |
| 1992 | 65° | 52° | 58° | 2.9" | — |
| 1991 | 64° | 37° | 51° | — | — |
| 1990 | 90° | 51° | 70° | — | — |
| 1989 | 88° | 52° | 70° | — | — |
| 1988 | 86° | 47° | 66° | — | — |
| 1987 | 61° | 41° | 51° | 1.24" | — |
| 1986 | 92° | 50° | 71° | — | — |
| 1985 | 71° | 47° | 59° | — | — |
| 1984 | 82° | 50° | 66° | — | — |
| 1983 | 63° | 48° | 55° | 2.46" | — |
| 1982 | 74° | 40° | 57° | — | — |
| 1981 | 61° | 47° | 54° | — | — |
| 1980 | 70° | 49° | 59° | — | — |
| 1979 | 60° | 46° | 53° | 1.24" | — |
| 1978 | 68° | 57° | 63° | 0.46" | — |
| 1977 | 85° | 44° | 64° | — | — |
| 1976 | 87° | 43° | 65° | — | — |
| 1975 | 64° | 46° | 55° | — | — |
| 1974 | 66° | 47° | 56° | — | — |
| 1973 | 54° | 47° | 50° | 0.05" | — |
| 1972 | 79° | 53° | 66° | — | — |
| 1971 | 71° | 42° | 57° | — | — |
56 years of data from SAN GABRIEL FIRE DEPT