Weather on May 20
San Ramon, CA
55 Years of Data
Avg High
72°F
Avg Low
49°F
Warmest
1978
76°F avg
Coldest
2019
45°F avg
About This Date
May 20th in San Ramon, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 49°F. Over 55 years of records, the warmest May 20th was in 1978 (76°F average), while the coldest was 2019 (45°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 20th dates historically. The last decade has been 5.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 5.0°F cooler on this date compared to 20-30 years ago.
Planning for May 20th in San Ramon, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 51° | 64° | — | — |
| 2024 | 69° | 45° | 57° | — | — |
| 2023 | 72° | 48° | 60° | — | — |
| 2022 | 83° | 49° | 66° | — | — |
| 2021 | 60° | 37° | 49° | — | — |
| 2020 | 58° | 45° | 51° | — | — |
| 2019coldest | 50° | 39° | 45° | 0.25" | — |
| 2018 | 59° | 43° | 51° | — | — |
| 2017 | 80° | 65° | 72° | — | — |
| 2016 | 81° | 40° | 60° | — | — |
| 2015 | 61° | 44° | 52° | — | — |
| 2014 | 60° | 43° | 51° | — | — |
| 2013 | 77° | 59° | 68° | — | — |
| 2012 | 78° | 58° | 68° | — | — |
| 2011 | 69° | 46° | 58° | — | — |
| 2010 | 60° | 42° | 51° | 0.05" | — |
| 2009 | 71° | 62° | 67° | — | — |
| 2008 | 88° | 51° | 69° | — | — |
| 2007 | 74° | 46° | 60° | — | — |
| 2006 | 74° | 52° | 63° | — | — |
| 2005 | 72° | 52° | 62° | — | — |
| 2004 | 65° | 51° | 58° | — | — |
| 2003 | 89° | 56° | 72° | — | — |
| 2002 | 58° | 48° | 53° | — | — |
| 2001 | 96° | 56° | 76° | — | — |
| 2000 | 92° | 59° | 75° | — | — |
| 1999 | 59° | 46° | 53° | — | — |
| 1998 | 63° | 45° | 54° | — | — |
| 1997 | 71° | 53° | 62° | — | — |
| 1996 | 72° | 49° | 60° | — | — |
| 1995 | 67° | 49° | 58° | — | — |
| 1994 | 67° | 48° | 57° | — | — |
| 1993 | 70° | 57° | 63° | — | — |
| 1992 | 75° | 52° | 63° | — | — |
| 1991 | 50° | 44° | 47° | — | — |
| 1990 | 63° | 54° | 58° | — | — |
| 1989 | 73° | 49° | 61° | — | — |
| 1988 | 84° | 60° | 72° | — | — |
| 1987 | 66° | 44° | 55° | — | — |
| 1986 | 75° | 49° | 62° | — | — |
| 1985 | 73° | 46° | 60° | — | — |
| 1984 | 81° | 60° | 70° | — | — |
| 1983 | 81° | 65° | 73° | — | — |
| 1982 | 78° | 56° | 67° | — | — |
| 1981 | 57° | 42° | 50° | — | — |
| 1980 | 85° | 65° | 75° | — | — |
| 1979 | 80° | 50° | 65° | — | — |
| 1978warmest | 89° | 63° | 76° | — | — |
| 1977 | 73° | 45° | 59° | — | — |
| 1976 | 74° | 42° | 58° | — | — |
| 1975 | 72° | 37° | 54° | — | — |
| 1974 | 63° | 33° | 48° | — | — |
| 1973 | 74° | 42° | 58° | — | — |
| 1972 | 55° | 41° | 48° | — | — |
| 1971 | 70° | 38° | 54° | — | — |
55 years of data from LIVERMORE CALIFORNIA