Weather on June 21
San Ramon, CA
55 Years of Data
About This Date
June 21st in San Ramon, CA typically brings warm summer weather, with average highs around 80°F and lows near 56°F. Over 55 years of records, the warmest June 21st was in 1981 (86°F average), while the coldest was 2009 (52°F) — a 34°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
Planning for June 21st in San Ramon, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 64° | 46° | 55° | — | — |
| 2024 | 79° | 63° | 71° | — | — |
| 2023 | 67° | 52° | 59° | — | — |
| 2022 | 88° | 65° | 76° | — | — |
| 2021 | 89° | 64° | 77° | — | — |
| 2020 | 79° | 60° | 69° | — | — |
| 2019 | 72° | 53° | 62° | — | — |
| 2018 | 76° | 57° | 66° | — | — |
| 2017 | 90° | 71° | 80° | — | — |
| 2016 | 84° | 69° | 77° | — | — |
| 2015 | 85° | 55° | 70° | — | — |
| 2014 | 83° | 60° | 71° | — | — |
| 2013 | 73° | 46° | 60° | — | — |
| 2012 | 86° | 46° | 66° | — | — |
| 2011 | 89° | 71° | 80° | — | — |
| 2010 | 73° | 53° | 63° | — | — |
| 2009coldest | 63° | 42° | 52° | — | — |
| 2008 | 98° | 68° | 83° | — | — |
| 2007 | 77° | 50° | 64° | — | — |
| 2006 | 100° | 63° | 81° | — | — |
| 2005 | 74° | 52° | 63° | — | — |
| 2004 | 77° | 53° | 65° | — | — |
| 2003 | 75° | 50° | 63° | — | — |
| 2002 | 65° | 51° | 58° | — | — |
| 2001 | 100° | 63° | 81° | — | — |
| 2000 | 93° | 61° | 77° | — | — |
| 1999 | 77° | 52° | 64° | — | — |
| 1998 | 70° | 53° | 61° | — | — |
| 1997 | 78° | 51° | 65° | — | — |
| 1996 | 70° | 49° | 59° | — | — |
| 1995 | 85° | 54° | 69° | — | — |
| 1994 | 80° | 48° | 64° | — | — |
| 1993 | 70° | 51° | 60° | — | — |
| 1992 | 89° | 68° | 79° | — | — |
| 1991 | 65° | 46° | 55° | — | — |
| 1990 | 88° | 56° | 72° | — | — |
| 1989 | 81° | 66° | 73° | — | — |
| 1988 | 78° | 47° | 62° | — | — |
| 1987 | 72° | 52° | 62° | — | — |
| 1986 | 80° | 60° | 70° | — | — |
| 1985 | 79° | 65° | 72° | — | — |
| 1984 | 70° | 49° | 59° | — | — |
| 1983 | 79° | 57° | 68° | — | — |
| 1982 | 75° | 56° | 65° | — | — |
| 1981warmest | 96° | 76° | 86° | — | — |
| 1980 | 69° | 47° | 58° | — | — |
| 1979 | 86° | 53° | 70° | — | — |
| 1978 | 75° | 48° | 62° | — | — |
| 1977 | 81° | 61° | 71° | — | — |
| 1976 | — | 45° | — | — | — |
| 1975 | 79° | 43° | 61° | — | — |
| 1974 | 83° | 47° | 65° | — | — |
| 1973 | 100° | 59° | 80° | — | — |
| 1972 | 87° | 62° | 75° | — | — |
| 1971 | 88° | 54° | 71° | — | — |
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
San Ramon, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.