Weather on June 21
San Jose, CA
55 Years of Data
Avg High
81°F
Avg Low
56°F
Warmest
1973
82°F avg
Coldest
1991
59°F avg
About This Date
June 21st in San Jose, CA typically brings warm summer weather, with average highs around 81°F and lows near 56°F — a 25°F daily swing. Over 55 years of records, the warmest June 21st was in 1973 (82°F average), while the coldest was 1991 (59°F) — a 23°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
Planning for June 21st in San Jose, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 53° | 63° | — | — |
| 2024 | 84° | 57° | 71° | — | — |
| 2023 | 73° | 49° | 61° | — | — |
| 2022 | 102° | 60° | 81° | — | — |
| 2021 | 78° | 57° | 68° | — | — |
| 2020 | 82° | 58° | 70° | — | — |
| 2019 | 79° | 56° | 67° | — | — |
| 2018 | 80° | 55° | 68° | — | — |
| 2017 | 91° | 59° | 75° | — | — |
| 2016 | 90° | 59° | 74° | — | — |
| 2015 | 73° | 56° | 64° | — | — |
| 2014 | 72° | 54° | 63° | — | — |
| 2013 | 80° | 53° | 67° | — | — |
| 2012 | 67° | 53° | 60° | — | — |
| 2011 | 96° | 65° | 80° | — | — |
| 2010 | 85° | 53° | 69° | — | — |
| 2009 | 75° | 51° | 63° | — | — |
| 2008 | 97° | 66° | 81° | — | — |
| 2007 | 81° | 54° | 67° | — | — |
| 2006 | 95° | 61° | 78° | — | — |
| 2005 | 73° | 55° | 64° | — | — |
| 2004 | 73° | 57° | 65° | — | — |
| 2003 | 73° | 55° | 64° | — | — |
| 2002 | 69° | 55° | 62° | — | — |
| 2001 | 90° | 62° | 76° | — | — |
| 2000 | 90° | 62° | 76° | — | — |
| 1999 | 72° | 56° | 64° | — | — |
| 1998 | 78° | 55° | 67° | — | — |
| 1997 | 77° | 55° | 66° | — | — |
| 1996 | 73° | 52° | 62° | — | — |
| 1995 | 88° | 55° | 71° | — | — |
| 1994 | 78° | 51° | 65° | — | — |
| 1993 | 74° | 57° | 65° | — | — |
| 1992 | 91° | 58° | 74° | — | — |
| 1991coldest | 69° | 48° | 59° | — | — |
| 1990 | 87° | 66° | 77° | — | — |
| 1989 | 97° | 58° | 77° | — | — |
| 1988 | 81° | 57° | 69° | — | — |
| 1987 | 73° | 61° | 67° | — | — |
| 1986 | 93° | 55° | 74° | — | — |
| 1985 | 82° | 59° | 71° | — | — |
| 1984 | 81° | 49° | 65° | — | — |
| 1983 | 81° | 53° | 67° | — | — |
| 1982 | 74° | 58° | 66° | — | — |
| 1981 | 97° | 65° | 81° | — | — |
| 1980 | 74° | 54° | 64° | — | — |
| 1979 | 74° | 50° | 62° | — | — |
| 1978 | 74° | 56° | 65° | — | — |
| 1977 | 92° | 57° | 74° | — | — |
| 1976 | 72° | 54° | 63° | — | — |
| 1975 | 72° | 52° | 62° | — | — |
| 1974 | 86° | 56° | 71° | — | — |
| 1973warmest | 101° | 64° | 82° | — | — |
| 1972 | 77° | 54° | 65° | — | — |
| 1971 | 88° | 55° | 71° | — | — |
55 years of data from SAN JOSE