Weather on March 21
San Jose, CA
55 Years of Data
Avg High
66°F
Avg Low
48°F
Warmest
1997
68°F avg
Coldest
1975
48°F avg
About This Date
March 21st in San Jose, CA typically brings mild spring weather, with average highs around 66°F and lows near 48°F. Over 56 years of records, the warmest March 21st was in 1997 (68°F average), while the coldest was 1975 (48°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 36% of March 21st dates historically, with the wettest March 21st recording 2.11" of rain. The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in San Jose, CA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 79° | 54° | 66° | — | — |
| 2025 | 63° | 43° | 53° | — | — |
| 2024 | 73° | 49° | 61° | — | — |
| 2023 | 56° | 47° | 51° | 2.11" | — |
| 2022 | 73° | 45° | 59° | — | — |
| 2021 | 66° | 40° | 53° | — | — |
| 2020 | 62° | 45° | 53° | — | — |
| 2019 | 63° | 43° | 53° | — | — |
| 2018 | 67° | 56° | 61° | 0.03" | — |
| 2017 | 69° | 56° | 62° | 0.46" | — |
| 2016 | 67° | 49° | 58° | 0.51" | — |
| 2015 | 72° | 49° | 60° | — | — |
| 2014 | 70° | 46° | 58° | — | — |
| 2013 | 63° | 45° | 54° | — | — |
| 2012 | 73° | 47° | 60° | — | — |
| 2011 | 56° | 43° | 49° | 1.07" | — |
| 2010 | 67° | 48° | 57° | — | — |
| 2009 | 63° | 49° | 56° | 0.33" | — |
| 2008 | 69° | 44° | 57° | — | — |
| 2007 | 67° | 47° | 57° | 0.03" | — |
| 2006 | 57° | 43° | 50° | 0.15" | — |
| 2005 | 63° | 49° | 56° | 0.36" | — |
| 2004 | 69° | 54° | 61° | — | — |
| 2003 | 67° | 43° | 55° | — | — |
| 2002 | 70° | 47° | 58° | — | — |
| 2001 | 72° | 53° | 62° | — | — |
| 2000 | 75° | 55° | 65° | — | — |
| 1999 | 63° | 45° | 54° | 1.27" | — |
| 1998 | 66° | 54° | 60° | — | — |
| 1997warmest | 79° | 57° | 68° | — | — |
| 1996 | 71° | 46° | 59° | — | — |
| 1995 | 56° | 44° | 50° | 0.58" | — |
| 1994 | 64° | 42° | 53° | — | — |
| 1993 | 70° | 52° | 61° | — | — |
| 1992 | 67° | 52° | 59° | 0.3" | — |
| 1991 | 57° | 44° | 51° | 0.25" | — |
| 1990 | 76° | 48° | 62° | — | — |
| 1989 | 71° | 51° | 61° | — | — |
| 1988 | 71° | 51° | 61° | — | — |
| 1987 | 54° | 42° | 48° | 1.73" | — |
| 1986 | 71° | 47° | 59° | — | — |
| 1985 | 60° | 43° | 51° | — | — |
| 1984 | 67° | 64° | 65° | — | — |
| 1983 | 60° | 42° | 51° | 1.02" | — |
| 1982 | 62° | 42° | 52° | — | — |
| 1981 | 67° | 49° | 58° | 0.74" | — |
| 1980 | 62° | 46° | 54° | 0.1" | — |
| 1979 | 63° | 50° | 56° | — | — |
| 1978 | 68° | 56° | 62° | 0.94" | — |
| 1977 | 74° | 42° | 58° | — | — |
| 1976 | 71° | 42° | 57° | — | — |
| 1975coldest | 57° | 39° | 48° | 0.08" | — |
| 1974 | 65° | 46° | 55° | — | — |
| 1973 | 55° | 43° | 49° | 0.89" | — |
| 1972 | 69° | 52° | 60° | — | — |
| 1971 | 73° | 41° | 57° | — | — |
56 years of data from SAN JOSE