Weather on May 18
Sunnyvale, CA
55 Years of Data
Avg High
73°F
Avg Low
53°F
Warmest
1997
82°F avg
Coldest
1974
51°F avg
About This Date
May 18th in Sunnyvale, CA typically brings pleasant spring weather, with average highs around 73°F and lows near 53°F. Over 55 years of records, the warmest May 18th was in 1997 (82°F average), while the coldest was 1974 (51°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 11% of May 18th dates historically, with the wettest May 18th recording 0.74" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for May 18th in Sunnyvale, CA? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 52° | 64° | — | — |
| 2024 | 78° | 57° | 68° | — | — |
| 2023 | 71° | 56° | 63° | — | — |
| 2022 | 86° | 50° | 68° | — | — |
| 2021 | 73° | 50° | 62° | — | — |
| 2020 | 71° | 54° | 62° | 0.15" | — |
| 2019 | 60° | 45° | 52° | 0.36" | — |
| 2018 | 67° | 53° | 60° | — | — |
| 2017 | 81° | 48° | 64° | — | — |
| 2016 | 82° | 60° | 71° | — | — |
| 2015 | 63° | 54° | 58° | — | — |
| 2014 | 73° | 56° | 64° | — | — |
| 2013 | 75° | 49° | 62° | — | — |
| 2012 | 75° | 50° | 63° | — | — |
| 2011 | 68° | 51° | 60° | — | — |
| 2010 | 68° | 54° | 61° | 0.74" | — |
| 2009 | 71° | 58° | 64° | — | — |
| 2008 | 79° | 56° | 67° | — | — |
| 2007 | 74° | 50° | 62° | — | — |
| 2006 | 70° | 55° | 62° | — | — |
| 2005 | 72° | 59° | 65° | — | — |
| 2004 | 70° | 52° | 61° | — | — |
| 2003 | 75° | 49° | 62° | — | — |
| 2002 | 66° | 48° | 57° | — | — |
| 2001 | 75° | 53° | 64° | — | — |
| 2000 | 79° | 52° | 65° | — | — |
| 1999 | 65° | 51° | 58° | — | — |
| 1998 | 76° | 46° | 61° | — | — |
| 1997warmest | 100° | 64° | 82° | — | — |
| 1996 | 71° | 54° | 62° | — | — |
| 1995 | 79° | 55° | 67° | — | — |
| 1994 | 72° | 54° | 63° | — | — |
| 1993 | 80° | 54° | 67° | — | — |
| 1992 | 77° | 61° | 69° | — | — |
| 1991 | 61° | 50° | 55° | — | — |
| 1990 | 66° | 52° | 59° | — | — |
| 1989 | 70° | 53° | 61° | — | — |
| 1988 | 74° | 49° | 61° | — | — |
| 1987 | 67° | 54° | 60° | — | — |
| 1986 | 68° | 55° | 62° | — | — |
| 1985 | 67° | 51° | 59° | — | — |
| 1984 | 71° | 52° | 61° | — | — |
| 1983 | 84° | 57° | 71° | — | — |
| 1982 | 72° | 48° | 60° | — | — |
| 1981 | 66° | 55° | 61° | 0.33" | — |
| 1980 | 73° | 51° | 62° | — | — |
| 1979 | 77° | 58° | 67° | — | — |
| 1978 | 90° | 57° | 73° | — | — |
| 1977 | 64° | 43° | 53° | 0.3" | — |
| 1976 | 64° | 46° | 55° | — | — |
| 1975 | 71° | 53° | 62° | — | — |
| 1974coldest | 59° | 43° | 51° | 0.28" | — |
| 1973 | 73° | 58° | 65° | — | — |
| 1972 | 65° | 46° | 55° | — | — |
| 1971 | 72° | 49° | 60° | — | — |
55 years of data from MOFFETT FED AIRFIELD