Weather on June 21
Vacaville, CA
55 Years of Data
Avg High
91°F
Avg Low
56°F
Warmest
1981
87°F avg
Coldest
2012
63°F avg
About This Date
June 21st in Vacaville, CA typically brings hot summer weather, with average highs around 91°F and lows near 56°F — a 35°F daily swing. Over 55 years of records, the warmest June 21st was in 1981 (87°F average), while the coldest was 2012 (63°F) — a 24°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
Planning for June 21st in Vacaville, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 51° | 67° | — | — |
| 2024 | 97° | 55° | 76° | — | — |
| 2023 | 85° | 47° | 66° | — | — |
| 2022 | 104° | 61° | 82° | — | — |
| 2021 | 92° | 63° | 77° | — | — |
| 2020 | 95° | 58° | 76° | — | — |
| 2019 | 91° | 57° | 74° | — | — |
| 2018 | 93° | 51° | 72° | — | — |
| 2017 | 104° | 67° | 85° | — | — |
| 2016 | 100° | 56° | 78° | — | — |
| 2015 | 88° | 57° | 72° | — | — |
| 2014 | 90° | 58° | 74° | — | — |
| 2013 | 89° | 55° | 72° | — | — |
| 2012coldest | 73° | 54° | 63° | — | — |
| 2011 | 103° | 64° | 83° | — | — |
| 2010 | 90° | 56° | 73° | — | — |
| 2009 | 83° | 58° | 70° | — | — |
| 2008 | 104° | 69° | 87° | — | — |
| 2007 | 95° | 53° | 74° | — | — |
| 2006 | 103° | 62° | 82° | — | — |
| 2005 | 82° | 55° | 69° | — | — |
| 2004 | 94° | 57° | 75° | — | — |
| 2003 | 82° | 53° | 68° | — | — |
| 2002 | 77° | 53° | 65° | — | — |
| 2001 | 107° | 67° | 87° | — | — |
| 2000 | 101° | 60° | 80° | — | — |
| 1999 | 90° | 64° | 77° | — | — |
| 1998 | 77° | 54° | 65° | — | — |
| 1997 | 89° | 56° | 72° | — | — |
| 1996 | 84° | 54° | 69° | — | — |
| 1995 | 92° | 60° | 76° | — | — |
| 1994 | 91° | 48° | 70° | — | — |
| 1993 | 83° | 52° | 67° | — | — |
| 1992 | 102° | 62° | 82° | — | — |
| 1991 | 81° | 48° | 64° | — | — |
| 1990 | 104° | 62° | 83° | — | — |
| 1989 | 97° | 52° | 74° | — | — |
| 1988 | 79° | 55° | 67° | — | — |
| 1987 | 84° | 55° | 70° | — | — |
| 1986 | 96° | 59° | 78° | — | — |
| 1985 | 89° | 62° | 76° | — | — |
| 1984 | 87° | 48° | 68° | — | — |
| 1983 | 87° | 55° | 71° | — | — |
| 1982 | 86° | 54° | 70° | — | — |
| 1981warmest | 105° | 68° | 87° | — | — |
| 1980 | 81° | 50° | 65° | — | — |
| 1979 | 84° | 55° | 70° | — | — |
| 1978 | 87° | 52° | 69° | — | — |
| 1977 | 100° | 60° | 80° | — | — |
| 1976 | 81° | 53° | 67° | — | — |
| 1975 | 81° | 48° | 64° | — | — |
| 1974 | 95° | 55° | 75° | — | — |
| 1973 | 103° | 56° | 79° | — | — |
| 1972 | 95° | 50° | 73° | — | — |
| 1971 | 98° | 55° | 77° | — | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS