Weather on December 18
Concord, CA
55 Years of Data
Avg High
57°F
Avg Low
39°F
Warmest
2010
57°F avg
Coldest
1985
37°F avg
About This Date
December 18th in Concord, CA typically brings cool winter weather, with average highs around 57°F and lows near 39°F. Over 55 years of records, the warmest December 18th was in 2010 (57°F average), while the coldest was 1985 (37°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 29% of December 18th dates historically, with the wettest December 18th recording 4.95" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for December 18th in Concord, CA? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 61° | 52° | 56° | — | — |
| 2024 | 54° | 40° | 47° | — | — |
| 2023 | 61° | 49° | 55° | 1.68" | — |
| 2022 | 52° | 30° | 41° | — | — |
| 2021 | 50° | 36° | 43° | — | — |
| 2020 | 62° | 36° | 49° | — | — |
| 2019 | 61° | 46° | 53° | 0.64" | — |
| 2018 | 65° | 45° | 55° | — | — |
| 2017 | 63° | 35° | 49° | — | — |
| 2016 | 54° | 30° | 42° | — | — |
| 2015 | 61° | 40° | 50° | 0.3" | — |
| 2014 | 59° | 51° | 55° | 0.03" | — |
| 2013 | 65° | 35° | 50° | — | — |
| 2012 | 52° | 34° | 43° | — | — |
| 2011 | 55° | 31° | 43° | — | — |
| 2010warmest | 60° | 53° | 57° | 0.51" | — |
| 2009 | 53° | 42° | 48° | — | — |
| 2008 | 53° | 29° | 41° | 0.13" | — |
| 2007 | 57° | 44° | 51° | 1.09" | — |
| 2006 | 57° | 28° | 43° | — | — |
| 2005 | 62° | 45° | 53° | 4.95" | — |
| 2004 | 49° | 34° | 41° | — | — |
| 2003 | 59° | 43° | 51° | — | — |
| 2002 | 57° | 38° | 47° | — | — |
| 2001 | 57° | 39° | 48° | — | — |
| 2000 | 56° | 38° | 47° | — | — |
| 1999 | 56° | 39° | 47° | — | — |
| 1998 | 67° | 37° | 52° | — | — |
| 1997 | 61° | 44° | 52° | 0.03" | — |
| 1996 | 63° | 42° | 52° | — | — |
| 1995 | 52° | 45° | 48° | 0.38" | — |
| 1994 | 55° | 42° | 49° | 0.03" | — |
| 1993 | 53° | 42° | 48° | — | — |
| 1992 | 53° | 32° | 43° | — | — |
| 1991 | 61° | 42° | 51° | 0.58" | — |
| 1990 | 58° | 35° | 46° | — | — |
| 1989 | 53° | 40° | 46° | — | — |
| 1988 | 57° | 44° | 51° | — | — |
| 1987 | 57° | 35° | 46° | — | — |
| 1986 | 58° | 38° | 48° | 0.89" | — |
| 1985coldest | 41° | 33° | 37° | — | — |
| 1984 | 46° | 33° | 40° | — | — |
| 1983 | 54° | 45° | 49° | — | — |
| 1982 | 55° | 37° | 46° | — | — |
| 1981 | 63° | 45° | 54° | 0.08" | — |
| 1980 | 60° | 44° | 52° | — | — |
| 1979 | 50° | 33° | 42° | — | — |
| 1978 | 56° | 41° | 48° | 1.32" | — |
| 1977 | 54° | 40° | 47° | 1.07" | — |
| 1976 | 61° | 33° | 47° | — | — |
| 1975 | 57° | 32° | 45° | — | — |
| 1974 | 64° | 29° | 46° | — | — |
| 1973 | 64° | 34° | 49° | — | — |
| 1972 | 52° | 43° | 47° | — | — |
| 1971 | 54° | 32° | 43° | — | — |
55 years of data from CONCORD BUCHANAN FLD