Weather on May 20
Vacaville, CA
55 Years of Data
Avg High
81°F
Avg Low
52°F
Warmest
1983
81°F avg
Coldest
1998
56°F avg
About This Date
May 20th in Vacaville, CA typically brings warm spring weather, with average highs around 81°F and lows near 52°F — a 29°F daily swing. Over 55 years of records, the warmest May 20th was in 1983 (81°F average), while the coldest was 1998 (56°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 5% of May 20th dates historically, with the wettest May 20th recording 1.32" of rain. The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
Planning for May 20th in Vacaville, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 48° | 68° | — | — |
| 2024 | 85° | 50° | 67° | — | — |
| 2023 | 83° | 54° | 68° | — | — |
| 2022 | 85° | 61° | 73° | — | — |
| 2021 | 72° | 51° | 61° | — | — |
| 2020 | 78° | 52° | 65° | — | — |
| 2019 | 70° | 43° | 56° | — | — |
| 2018 | 75° | 50° | 63° | — | — |
| 2017 | 93° | 53° | 73° | — | — |
| 2016 | 71° | 52° | 61° | — | — |
| 2015 | 75° | 52° | 63° | — | — |
| 2014 | 75° | 54° | 64° | — | — |
| 2013 | 91° | 64° | 78° | — | — |
| 2012 | 91° | 54° | 72° | — | — |
| 2011 | 79° | 50° | 64° | — | — |
| 2010 | 77° | 48° | 63° | — | — |
| 2009 | 83° | 52° | 67° | — | — |
| 2008 | 85° | 60° | 72° | — | — |
| 2007 | 87° | 57° | 72° | — | — |
| 2006 | 75° | 51° | 63° | — | — |
| 2005 | 77° | 49° | 63° | — | — |
| 2004 | 77° | 52° | 64° | — | — |
| 2003 | 90° | 49° | 69° | — | — |
| 2002 | 63° | 49° | 56° | 1.32" | — |
| 2001 | 102° | 59° | 81° | — | — |
| 2000 | 98° | 57° | 78° | — | — |
| 1999 | 71° | 50° | 61° | — | — |
| 1998coldest | 70° | 43° | 56° | — | — |
| 1997 | 95° | 56° | 75° | — | — |
| 1996 | 77° | 49° | 63° | — | — |
| 1995 | 86° | 49° | 67° | — | — |
| 1994 | 76° | 42° | 59° | — | — |
| 1993 | 78° | 58° | 68° | — | — |
| 1992 | 83° | 50° | 66° | — | — |
| 1991 | 79° | 45° | 62° | — | — |
| 1990 | 69° | 52° | 60° | — | — |
| 1989 | 82° | 50° | 66° | — | — |
| 1988 | 95° | 60° | 78° | — | — |
| 1987 | 73° | 52° | 62° | 0.2" | — |
| 1986 | 76° | 55° | 65° | — | — |
| 1985 | 87° | 48° | 68° | — | — |
| 1984 | 87° | 58° | 72° | — | — |
| 1983warmest | 91° | 71° | 81° | — | — |
| 1982 | 83° | 50° | 66° | — | — |
| 1981 | 75° | 43° | 59° | — | — |
| 1980 | 96° | 58° | 77° | — | — |
| 1979 | 82° | 54° | 68° | — | — |
| 1978 | 92° | 52° | 72° | — | — |
| 1977 | 82° | 49° | 65° | — | — |
| 1976 | 85° | 43° | 64° | — | — |
| 1975 | 79° | 54° | 66° | — | — |
| 1974 | 73° | 46° | 60° | — | — |
| 1973 | 75° | 49° | 62° | — | — |
| 1972 | 64° | 50° | 57° | 0.03" | — |
| 1971 | 82° | 46° | 64° | — | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS