Weather on August 17
Sunnyvale, CA
55 Years of Data
Avg High
77°F
Avg Low
59°F
Warmest
2020
84°F avg
Coldest
1973
63°F avg
About This Date
August 17th in Sunnyvale, CA typically brings pleasant summer weather, with average highs around 77°F and lows near 59°F. Over 55 years of records, the warmest August 17th was in 2020 (84°F average), while the coldest was 1973 (63°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 17th dates historically. The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
Planning for August 17th in Sunnyvale, CA? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 61° | 68° | — | — |
| 2024 | 85° | 63° | 74° | — | — |
| 2023 | 85° | 65° | 75° | — | — |
| 2022 | 83° | 64° | 73° | — | — |
| 2021 | 82° | 60° | 71° | — | — |
| 2020warmest | 96° | 71° | 84° | — | — |
| 2019 | 84° | 60° | 72° | — | — |
| 2018 | 81° | 60° | 70° | — | — |
| 2017 | 76° | 60° | 68° | — | — |
| 2016 | 77° | 60° | 69° | — | — |
| 2015 | 85° | 62° | 73° | — | — |
| 2014 | 74° | 60° | 67° | — | — |
| 2013 | 75° | 61° | 68° | — | — |
| 2012 | 72° | 59° | 65° | — | — |
| 2011 | 72° | 61° | 66° | — | — |
| 2010 | 70° | 56° | 63° | — | — |
| 2009 | 72° | 58° | 65° | — | — |
| 2008 | 75° | 61° | 68° | — | — |
| 2007 | 80° | 55° | 68° | — | — |
| 2006 | 79° | 54° | 66° | — | — |
| 2005 | 74° | 59° | 66° | — | — |
| 2004 | 81° | 61° | 71° | — | — |
| 2003 | 81° | 58° | 69° | — | — |
| 2002 | 69° | 59° | 64° | — | — |
| 2001 | 83° | 58° | 70° | — | — |
| 2000 | 78° | 56° | 67° | — | — |
| 1999 | 70° | 58° | 64° | — | — |
| 1998 | 73° | 57° | 65° | — | — |
| 1997 | 80° | 57° | 69° | — | — |
| 1996 | 74° | 58° | 66° | — | — |
| 1995 | 77° | 55° | 66° | — | — |
| 1994 | 94° | 59° | 76° | — | — |
| 1993 | 85° | 62° | 73° | — | — |
| 1992 | 77° | 60° | 69° | — | — |
| 1991 | 70° | 60° | 65° | — | — |
| 1990 | 78° | 65° | 71° | — | — |
| 1989 | 79° | 57° | 68° | — | — |
| 1988 | 85° | 58° | 71° | — | — |
| 1987 | 76° | 61° | 68° | — | — |
| 1986 | 71° | 62° | 67° | — | — |
| 1985 | 70° | 57° | 63° | — | — |
| 1984 | 85° | 62° | 73° | — | — |
| 1983 | 73° | 63° | 68° | — | — |
| 1982 | 73° | 60° | 67° | — | — |
| 1981 | 68° | 58° | 63° | — | — |
| 1980 | 73° | 57° | 65° | — | — |
| 1979 | 77° | 58° | 67° | — | — |
| 1978 | 82° | 54° | 68° | — | — |
| 1977 | 72° | 60° | 66° | — | — |
| 1976 | 73° | 57° | 65° | 0.15" | — |
| 1975 | 72° | 55° | 63° | — | — |
| 1974 | 72° | 60° | 66° | — | — |
| 1973coldest | 70° | 57° | 63° | — | — |
| 1972 | 78° | 56° | 67° | — | — |
| 1971 | 73° | 61° | 67° | — | — |
55 years of data from MOFFETT FED AIRFIELD