Weather on October 18
Concord, CA
55 Years of Data
Avg High
78°F
Avg Low
50°F
Warmest
2020
74°F avg
Coldest
1971
52°F avg
About This Date
October 18th in Concord, CA typically brings pleasant fall weather, with average highs around 78°F and lows near 50°F — a 28°F daily swing. Over 55 years of records, the warmest October 18th was in 2020 (74°F average), while the coldest was 1971 (52°F) — a 22°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for October 18th in Concord, CA? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 51° | 65° | — | — |
| 2024 | 80° | 53° | 67° | — | — |
| 2023 | 88° | 56° | 72° | — | — |
| 2022 | 85° | 55° | 70° | — | — |
| 2021 | 66° | 48° | 57° | — | — |
| 2020warmest | 93° | 56° | 74° | — | — |
| 2019 | 72° | 49° | 60° | — | — |
| 2018 | 81° | 48° | 64° | — | — |
| 2017 | 80° | 45° | 62° | — | — |
| 2016 | 74° | 50° | 62° | — | — |
| 2015 | 75° | 56° | 65° | — | — |
| 2014 | 80° | 55° | 68° | — | — |
| 2013 | 82° | 45° | 63° | — | — |
| 2012 | 87° | 52° | 69° | — | — |
| 2011 | 83° | 55° | 69° | — | — |
| 2010 | 73° | 50° | 62° | — | — |
| 2009 | 69° | 55° | 62° | — | — |
| 2008 | 78° | 51° | 65° | — | — |
| 2007 | 73° | 51° | 62° | — | — |
| 2006 | 78° | 45° | 61° | — | — |
| 2005 | 71° | 57° | 64° | — | — |
| 2004 | 66° | 50° | 58° | — | — |
| 2003 | 82° | 52° | 67° | — | — |
| 2002 | 71° | 54° | 62° | — | — |
| 2001 | 85° | 50° | 67° | — | — |
| 2000 | 80° | 50° | 65° | — | — |
| 1999 | 80° | 47° | 63° | — | — |
| 1998 | 77° | 46° | 62° | — | — |
| 1997 | 84° | 51° | 68° | — | — |
| 1996 | 75° | 54° | 64° | — | — |
| 1995 | 85° | 55° | 70° | — | — |
| 1994 | 74° | 48° | 61° | — | — |
| 1993 | 75° | 49° | 62° | — | — |
| 1992 | 80° | 55° | 68° | — | — |
| 1991 | 88° | 54° | 71° | — | — |
| 1990 | 72° | 48° | 60° | — | — |
| 1989 | 84° | 51° | 68° | — | — |
| 1988 | 88° | 56° | 72° | — | — |
| 1987 | 81° | 45° | 63° | — | — |
| 1986 | 76° | 43° | 59° | — | — |
| 1985 | 69° | 45° | 57° | — | — |
| 1984 | 65° | 39° | 52° | — | — |
| 1983 | 79° | 44° | 61° | — | — |
| 1982 | 76° | 47° | 61° | — | — |
| 1981 | 82° | 45° | 63° | — | — |
| 1980 | 74° | 48° | 61° | — | — |
| 1979 | 72° | 55° | 63° | — | — |
| 1978 | 73° | 54° | 63° | — | — |
| 1977 | 73° | 49° | 61° | — | — |
| 1976 | 84° | 48° | 66° | — | — |
| 1975 | 75° | 55° | 65° | — | — |
| 1974 | 91° | 48° | 70° | — | — |
| 1973 | 83° | 45° | 64° | — | — |
| 1972 | 71° | 52° | 61° | — | — |
| 1971coldest | 68° | 36° | 52° | — | — |
55 years of data from CONCORD BUCHANAN FLD