Weather on May 15
San Ramon, CA
55 Years of Data
Avg High
72°F
Avg Low
50°F
Warmest
1972
80°F avg
Coldest
2011
43°F avg
About This Date
May 15th in San Ramon, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 50°F. Over 55 years of records, the warmest May 15th was in 1972 (80°F average), while the coldest was 2011 (43°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 9% of May 15th dates historically, with the wettest May 15th recording 0.89" of rain. The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
Planning for May 15th in San Ramon, CA? Great weather for outdoor activities.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 54° | 63° | — | — |
| 2024 | 78° | 65° | 71° | — | — |
| 2023 | 76° | 60° | 68° | — | — |
| 2022 | 79° | 60° | 69° | — | — |
| 2021 | 68° | 42° | 55° | 0.05" | — |
| 2020 | 58° | 46° | 52° | — | — |
| 2019 | 59° | 48° | 54° | — | — |
| 2018 | 62° | 43° | 52° | — | — |
| 2017 | 58° | 40° | 49° | 0.18" | — |
| 2016 | 76° | 43° | 59° | — | — |
| 2015 | 57° | 41° | 49° | 0.89" | — |
| 2014 | 87° | 69° | 78° | — | — |
| 2013 | 73° | 42° | 58° | — | — |
| 2012 | 60° | 47° | 53° | — | — |
| 2011coldest | 50° | 35° | 43° | 0.76" | — |
| 2010 | 75° | 55° | 65° | — | — |
| 2009 | 72° | 51° | 61° | — | — |
| 2008 | 84° | 65° | 74° | — | — |
| 2007 | 61° | 46° | 53° | — | — |
| 2006 | 90° | 57° | 73° | — | — |
| 2005 | 74° | 58° | 66° | — | — |
| 2004 | 74° | 49° | 61° | — | — |
| 2003 | 65° | 46° | 55° | — | — |
| 2002 | 79° | 46° | 62° | — | — |
| 2001 | 77° | 53° | 65° | — | — |
| 2000 | 61° | 49° | 55° | — | — |
| 1999 | 64° | 42° | 53° | — | — |
| 1998 | 64° | 46° | 55° | — | — |
| 1997 | 85° | 58° | 71° | — | — |
| 1996 | 69° | 60° | 65° | — | — |
| 1995 | 66° | 47° | 56° | — | — |
| 1994 | 63° | 50° | 56° | — | — |
| 1993 | 75° | 48° | 62° | — | — |
| 1992 | 71° | 48° | 60° | — | — |
| 1991 | 78° | 47° | 62° | — | — |
| 1990 | 72° | 45° | 58° | — | — |
| 1989 | 70° | 43° | 56° | — | — |
| 1988 | 80° | 62° | 71° | — | — |
| 1987 | 88° | 59° | 73° | — | — |
| 1986 | 77° | 44° | 61° | — | — |
| 1985 | 79° | 58° | 68° | — | — |
| 1984 | 60° | 39° | 50° | — | — |
| 1983 | 74° | 48° | 61° | — | — |
| 1982 | 67° | 49° | 58° | — | — |
| 1981 | 59° | 44° | 52° | — | — |
| 1980 | 61° | 41° | 51° | — | — |
| 1979 | 87° | 44° | 66° | — | — |
| 1978 | 69° | 46° | 58° | 0.28" | — |
| 1977 | 60° | 40° | 50° | — | — |
| 1976 | 95° | 50° | 73° | — | — |
| 1975 | 62° | 42° | 52° | — | — |
| 1974 | 70° | 43° | 56° | — | — |
| 1973 | 78° | 59° | 69° | — | — |
| 1972warmest | 95° | 65° | 80° | — | — |
| 1971 | 75° | 50° | 63° | — | — |
55 years of data from LIVERMORE CALIFORNIA