Weather on May 17
Vacaville, CA
55 Years of Data
Avg High
81°F
Avg Low
51°F
Warmest
1997
86°F avg
Coldest
1998
53°F avg
About This Date
May 17th in Vacaville, CA typically brings warm spring weather, with average highs around 81°F and lows near 51°F — a 30°F daily swing. Over 55 years of records, the warmest May 17th was in 1997 (86°F average), while the coldest was 1998 (53°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 11% of May 17th dates historically, with the wettest May 17th recording 1.12" of rain. 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 May 17th in Vacaville, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 55° | 68° | — | — |
| 2024 | 83° | 53° | 68° | — | — |
| 2023 | 91° | 52° | 71° | — | — |
| 2022 | 92° | 50° | 71° | — | — |
| 2021 | 78° | 51° | 65° | — | — |
| 2020 | 76° | 60° | 68° | — | — |
| 2019 | 71° | 50° | 61° | — | — |
| 2018 | 80° | 50° | 65° | — | — |
| 2017 | 80° | 44° | 62° | — | — |
| 2016 | 93° | 64° | 79° | — | — |
| 2015 | 70° | 54° | 62° | — | — |
| 2014 | 79° | 58° | 68° | — | — |
| 2013 | 77° | 50° | 64° | — | — |
| 2012 | 78° | 55° | 67° | — | — |
| 2011 | 57° | 49° | 53° | 1.12" | — |
| 2010 | 61° | 52° | 56° | 0.15" | — |
| 2009 | 103° | 64° | 83° | — | — |
| 2008 | 105° | 67° | 86° | — | — |
| 2007 | 81° | 52° | 66° | — | — |
| 2006 | 93° | 58° | 75° | — | — |
| 2005 | 64° | 51° | 58° | 0.03" | — |
| 2004 | 72° | 52° | 62° | — | — |
| 2003 | 80° | 47° | 63° | — | — |
| 2002 | 86° | 50° | 68° | — | — |
| 2001 | 90° | 51° | 70° | — | — |
| 2000 | 77° | 51° | 64° | — | — |
| 1999 | 84° | 45° | 64° | — | — |
| 1998coldest | 69° | 38° | 53° | — | — |
| 1997warmest | 102° | 70° | 86° | — | — |
| 1996 | 71° | 58° | 64° | 0.03" | — |
| 1995 | 78° | 50° | 64° | — | — |
| 1994 | 68° | 47° | 57° | 0.3" | — |
| 1993 | 87° | 54° | 70° | — | — |
| 1992 | 87° | 50° | 69° | — | — |
| 1991 | 69° | 42° | 56° | 0.25" | — |
| 1990 | 80° | 50° | 65° | — | — |
| 1989 | 87° | 50° | 69° | — | — |
| 1988 | 73° | 49° | 61° | — | — |
| 1987 | 74° | 52° | 63° | — | — |
| 1986 | 92° | 54° | 73° | — | — |
| 1985 | 71° | 48° | 60° | — | — |
| 1984 | 79° | 51° | 65° | — | — |
| 1983 | 83° | 50° | 66° | — | — |
| 1982 | 82° | 54° | 68° | — | — |
| 1981 | 80° | 42° | 61° | — | — |
| 1980 | 89° | 47° | 68° | — | — |
| 1979 | 93° | 50° | 72° | — | — |
| 1978 | 86° | 63° | 74° | — | — |
| 1977 | 72° | 39° | 55° | — | — |
| 1976 | 85° | 48° | 66° | — | — |
| 1975 | 92° | 49° | 70° | — | — |
| 1974 | 66° | 41° | 54° | — | — |
| 1973 | 98° | 57° | 78° | — | — |
| 1972 | 75° | 43° | 59° | — | — |
| 1971 | 76° | 35° | 55° | — | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS