Weather on May 20
Sunnyvale, CA
55 Years of Data
Avg High
73°F
Avg Low
53°F
Warmest
1983
76°F avg
Coldest
1974
55°F avg
About This Date
May 20th 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 20th was in 1983 (76°F average), while the coldest was 1974 (55°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 2% of May 20th dates historically, with the wettest May 20th recording 0.53" of rain. The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
Planning for May 20th in Sunnyvale, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 54° | 64° | — | — |
| 2024 | 78° | 52° | 65° | — | — |
| 2023 | 68° | 55° | 62° | — | — |
| 2022 | 79° | 51° | 65° | — | — |
| 2021 | 67° | 48° | 57° | — | — |
| 2020 | 72° | 55° | 63° | — | — |
| 2019 | 67° | 49° | 58° | — | — |
| 2018 | 65° | 54° | 59° | — | — |
| 2017 | 85° | 57° | 71° | — | — |
| 2016 | 64° | 53° | 59° | — | — |
| 2015 | 66° | 55° | 61° | — | — |
| 2014 | 72° | 54° | 63° | — | — |
| 2013 | 90° | 55° | 72° | — | — |
| 2012 | 77° | 54° | 65° | — | — |
| 2011 | 67° | 53° | 60° | — | — |
| 2010 | 70° | 50° | 60° | — | — |
| 2009 | 67° | 50° | 58° | — | — |
| 2008 | 76° | 54° | 65° | — | — |
| 2007 | 73° | 51° | 62° | — | — |
| 2006 | 75° | 57° | 66° | — | — |
| 2005 | 71° | 50° | 61° | — | — |
| 2004 | 67° | 55° | 61° | — | — |
| 2003 | 85° | 55° | 70° | — | — |
| 2002 | 61° | 52° | 56° | 0.53" | — |
| 2001 | 83° | 59° | 71° | — | — |
| 2000 | 84° | 57° | 71° | — | — |
| 1999 | 60° | 50° | 55° | — | — |
| 1998 | 68° | 49° | 58° | — | — |
| 1997 | 82° | 58° | 70° | — | — |
| 1996 | 74° | 50° | 62° | — | — |
| 1995 | 79° | 55° | 67° | — | — |
| 1994 | 69° | 53° | 61° | — | — |
| 1993 | 76° | 61° | 68° | — | — |
| 1992 | 78° | 58° | 68° | — | — |
| 1991 | 68° | 49° | 58° | — | — |
| 1990 | 70° | 58° | 64° | — | — |
| 1989 | 68° | 53° | 61° | — | — |
| 1988 | 91° | 59° | 75° | — | — |
| 1987 | 74° | 55° | 64° | — | — |
| 1986 | 70° | 55° | 62° | — | — |
| 1985 | 69° | 51° | 60° | — | — |
| 1984 | 74° | 54° | 64° | — | — |
| 1983warmest | 89° | 62° | 76° | — | — |
| 1982 | 68° | 53° | 61° | — | — |
| 1981 | 71° | 48° | 60° | — | — |
| 1980 | 76° | 58° | 67° | — | — |
| 1979 | 78° | 56° | 67° | — | — |
| 1978 | 70° | 58° | 64° | — | — |
| 1977 | 71° | 52° | 61° | — | — |
| 1976 | 75° | 46° | 61° | — | — |
| 1975 | 71° | 48° | 60° | — | — |
| 1974coldest | 64° | 47° | 55° | — | — |
| 1973 | 66° | 53° | 60° | — | — |
| 1972 | 69° | 52° | 60° | — | — |
| 1971 | 67° | 49° | 58° | — | — |
55 years of data from MOFFETT FED AIRFIELD