Weather on May 15
San Ramon, CA
55 Years of Data
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 56 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. The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
Planning for May 15th in San Ramon, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 77° | 53° | 65° | — | — |
| 2025 | 73° | 54° | 63° | — | — |
| 2024 | 78° | 65° | 71° | — | — |
| 2023 | 76° | 60° | 68° | — | — |
| 2022 | 79° | 60° | 69° | — | — |
| 2021 | 68° | 42° | 55° | 0.02" | — |
| 2020 | 58° | 46° | 52° | — | — |
| 2019 | 59° | 48° | 54° | — | — |
| 2018 | 62° | 43° | 52° | — | — |
| 2017 | 58° | 40° | 49° | 0.07" | — |
| 2016 | 76° | 43° | 59° | — | — |
| 2015 | 57° | 41° | 49° | 0.35" | — |
| 2014 | 87° | 69° | 78° | — | — |
| 2013 | 73° | 42° | 58° | — | — |
| 2012 | 60° | 47° | 53° | — | — |
| 2011coldest | 50° | 35° | 43° | 0.3" | — |
| 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° | 0.11" | — |
| 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° | — | — |
San Ramon, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Ramon, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
San Ramon, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit San Ramon, CA
Most pleasant months in San Ramon, CA: May, June, September, October.
What to expect on May 15th
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
May 15th outlook →