Weather on October 18
San Ramon, CA
55 Years of Data
About This Date
October 18th in San Ramon, CA typically brings pleasant fall weather, with average highs around 74°F and lows near 53°F. Over 53 years of records, the warmest October 18th was in 1974 (82°F average), while the coldest was 1984 (48°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 13% of October 18th dates historically, with the wettest October 18th recording 0.9" of rain. The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
Planning for October 18th in San Ramon, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 55° | 63° | — | — |
| 2024 | 60° | 51° | 56° | — | — |
| 2023 | 77° | 63° | 70° | — | — |
| 2022 | 70° | 50° | 60° | — | — |
| 2021 | 65° | 41° | 53° | 0.06" | — |
| 2020 | 89° | 70° | 79° | — | — |
| 2019 | 69° | 48° | 59° | — | — |
| 2018 | 74° | 57° | 65° | — | — |
| 2017 | 77° | 58° | 67° | — | — |
| 2016 | 61° | 48° | 54° | — | — |
| 2015 | 62° | 49° | 55° | — | — |
| 2014 | 67° | 53° | 60° | — | — |
| 2013 | 76° | 59° | 67° | — | — |
| 2012 | 82° | 65° | 73° | — | — |
| 2011 | 83° | 62° | 72° | — | — |
| 2010 | 55° | 46° | 51° | 0.07" | — |
| 2009 | 77° | 57° | 67° | — | — |
| 2008 | 82° | 62° | 72° | — | — |
| 2007 | 59° | 40° | 49° | 0.02" | — |
| 2006 | 79° | 53° | 66° | — | — |
| 2005 | 76° | 57° | 66° | — | — |
| 2004 | 64° | 50° | 57° | — | — |
| 2003 | 84° | 57° | 71° | — | — |
| 2002 | 71° | 51° | 61° | — | — |
| 2001 | 85° | 50° | 67° | — | — |
| 2000 | 79° | 52° | 65° | — | — |
| 1999 | 83° | 53° | 68° | — | — |
| 1998 | 78° | 47° | 62° | — | — |
| 1997 | 85° | 52° | 68° | — | — |
| 1996 | 64° | 47° | 55° | — | — |
| 1995 | 85° | 53° | 69° | — | — |
| 1994 | 77° | 49° | 63° | — | — |
| 1993 | 73° | 41° | 57° | — | — |
| 1992 | 70° | 53° | 61° | — | — |
| 1991 | 90° | 53° | 71° | — | — |
| 1990 | 65° | 56° | 60° | — | — |
| 1989 | 80° | 59° | 70° | — | — |
| 1988 | 91° | 62° | 77° | — | — |
| 1986 | 60° | 44° | 52° | 0.03" | — |
| 1985 | 77° | 44° | 61° | — | — |
| 1984coldest | 58° | 39° | 48° | 0.01" | — |
| 1983 | 74° | 53° | 63° | — | — |
| 1982 | 71° | 49° | 60° | — | — |
| 1981 | 73° | 51° | 62° | — | — |
| 1979 | 75° | 50° | 63° | 0.9" | — |
| 1978 | 80° | 58° | 69° | — | — |
| 1977 | 74° | 48° | 61° | — | — |
| 1976 | 83° | 58° | 70° | — | — |
| 1975 | 75° | 51° | 63° | — | — |
| 1974warmest | 91° | 74° | 82° | — | — |
| 1973 | 87° | 56° | 71° | — | — |
| 1972 | 64° | 57° | 61° | 0.05" | — |
| 1971 | 67° | 41° | 54° | — | — |
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 October 18th
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.
October 18th outlook →