Weather on March 18
Concord, CA
55 Years of Data
Avg High
68°F
Avg Low
45°F
Warmest
2026
70°F avg
Coldest
1991
46°F avg
About This Date
March 18th in Concord, CA typically brings mild spring weather, with average highs around 68°F and lows near 45°F. Over 56 years of records, the warmest March 18th was in 2026 (70°F average), while the coldest was 1991 (46°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 21% of March 18th dates historically, with the wettest March 18th recording 2.18" of rain. The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
Planning for March 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 |
|---|---|---|---|---|---|
| 2026warmest | 86° | 54° | 70° | — | — |
| 2025 | 62° | 40° | 51° | — | — |
| 2024 | 73° | 47° | 60° | — | — |
| 2023 | 63° | 43° | 53° | — | — |
| 2022 | 73° | 44° | 59° | — | — |
| 2021 | 58° | 50° | 54° | 0.51" | — |
| 2020 | 55° | 46° | 51° | 1.07" | — |
| 2019 | 76° | 45° | 60° | — | — |
| 2018 | 59° | 38° | 48° | — | — |
| 2017 | 70° | 53° | 61° | — | — |
| 2016 | 71° | 48° | 60° | — | — |
| 2015 | 75° | 49° | 62° | — | — |
| 2014 | 71° | 42° | 57° | — | — |
| 2013 | 67° | 43° | 55° | — | — |
| 2012 | 54° | 42° | 48° | — | — |
| 2011 | 56° | 41° | 48° | 2.18" | — |
| 2010 | 79° | 46° | 62° | — | — |
| 2009 | 74° | 46° | 60° | — | — |
| 2008 | 72° | 46° | 59° | — | — |
| 2007 | 74° | 50° | 62° | — | — |
| 2006 | 61° | 39° | 50° | — | — |
| 2005 | 60° | 52° | 56° | 0.25" | — |
| 2004 | 84° | 52° | 68° | — | — |
| 2003 | 66° | 41° | 54° | — | — |
| 2002 | 62° | 36° | 49° | — | — |
| 2001 | 78° | 48° | 63° | — | — |
| 2000 | 76° | 48° | 62° | — | — |
| 1999 | 62° | 45° | 53° | — | — |
| 1998 | 73° | 47° | 60° | — | — |
| 1997 | 72° | 46° | 59° | — | — |
| 1996 | 80° | 52° | 66° | — | — |
| 1995 | 69° | 53° | 61° | 0.15" | — |
| 1994 | 67° | 41° | 54° | — | — |
| 1993 | 67° | 52° | 59° | — | — |
| 1992 | 64° | 45° | 54° | — | — |
| 1991coldest | 56° | 37° | 46° | 0.58" | — |
| 1990 | 71° | 46° | 59° | 0.05" | — |
| 1989 | 59° | 49° | 54° | 0.36" | — |
| 1988 | 75° | 40° | 57° | — | — |
| 1987 | 61° | 43° | 52° | — | — |
| 1986 | 70° | 43° | 56° | — | — |
| 1985 | 63° | 42° | 52° | 0.66" | — |
| 1984 | 71° | 39° | 55° | — | — |
| 1983 | 60° | 43° | 51° | 1.75" | — |
| 1982 | 59° | 37° | 48° | 0.38" | — |
| 1981 | 55° | 43° | 49° | — | — |
| 1980 | 69° | 43° | 56° | — | — |
| 1979 | 60° | 45° | 52° | — | — |
| 1978 | — | 52° | — | — | — |
| 1977 | 66° | 37° | 52° | — | — |
| 1976 | 68° | 48° | 58° | 0.3" | — |
| 1975 | 66° | 39° | 53° | — | — |
| 1974 | 74° | 44° | 59° | — | — |
| 1973 | 62° | 33° | 48° | — | — |
| 1972 | 72° | 47° | 59° | — | — |
| 1971 | 68° | 37° | 53° | — | — |
56 years of data from CONCORD BUCHANAN FLD