Weather on September 6
Costa Mesa, CA
55 Years of Data
Avg High
85°F
Avg Low
66°F
Warmest
2024
91°F avg
Coldest
1973
67°F avg
About This Date
September 6th in Costa Mesa, CA typically brings warm fall weather, with average highs around 85°F and lows near 66°F. Over 55 years of records, the warmest September 6th was in 2024 (91°F average), while the coldest was 1973 (67°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 2% of September 6th dates historically, with the wettest September 6th recording 1.85" of rain. The last decade has been 4.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.4°F warmer on this date compared to 20-30 years ago.
Planning for September 6th in Costa Mesa, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 67° | 74° | — | — |
| 2024warmest | 109° | 73° | 91° | — | — |
| 2023 | 80° | 68° | 74° | — | — |
| 2022 | 91° | 76° | 83° | — | — |
| 2021 | 81° | 69° | 75° | — | — |
| 2020 | 105° | 74° | 89° | — | — |
| 2019 | 90° | 73° | 81° | — | — |
| 2018 | 78° | 67° | 72° | — | — |
| 2017 | 82° | 68° | 75° | — | — |
| 2016 | 78° | 67° | 72° | — | — |
| 2015 | 86° | 64° | 75° | — | — |
| 2014 | 88° | 71° | 79° | — | — |
| 2013 | 96° | 75° | 86° | — | — |
| 2012 | 87° | 70° | 78° | — | — |
| 2011 | 93° | 66° | 80° | — | — |
| 2010 | 76° | 64° | 70° | — | — |
| 2009 | 81° | 65° | 73° | — | — |
| 2008 | 83° | 66° | 74° | — | — |
| 2007 | 76° | 66° | 71° | — | — |
| 2006 | 86° | 68° | 77° | — | — |
| 2005 | 83° | 61° | 72° | — | — |
| 2004 | 87° | 68° | 78° | — | — |
| 2003 | 86° | 66° | 76° | — | — |
| 2002 | 81° | 66° | 73° | — | — |
| 2001 | 74° | 65° | 69° | — | — |
| 2000 | 85° | 61° | 73° | — | — |
| 1999 | 76° | 63° | 69° | — | — |
| 1998 | 80° | 70° | 75° | — | — |
| 1997 | 90° | 70° | 80° | — | — |
| 1996 | 88° | 66° | 77° | — | — |
| 1995 | 91° | 70° | 80° | — | — |
| 1994 | 90° | 67° | 78° | — | — |
| 1993 | 81° | 65° | 73° | — | — |
| 1992 | 82° | 62° | 72° | — | — |
| 1991 | 81° | 64° | 72° | — | — |
| 1990 | 91° | 67° | 79° | — | — |
| 1989 | 88° | 63° | 75° | — | — |
| 1988 | 94° | 67° | 80° | — | — |
| 1987 | 82° | 57° | 70° | — | — |
| 1986 | 81° | 63° | 72° | — | — |
| 1985 | 77° | 60° | 69° | — | — |
| 1984 | 103° | 71° | 87° | — | — |
| 1983 | 86° | 62° | 74° | — | — |
| 1982 | 87° | 67° | 77° | — | — |
| 1981 | 84° | 64° | 74° | — | — |
| 1980 | 79° | 61° | 70° | — | — |
| 1979 | 81° | 65° | 73° | — | — |
| 1978 | 78° | 67° | 72° | 1.85" | — |
| 1977 | 95° | 64° | 80° | — | — |
| 1976 | 82° | 66° | 74° | — | — |
| 1975 | 76° | 63° | 69° | — | — |
| 1974 | 90° | 64° | 77° | — | — |
| 1973coldest | 78° | 56° | 67° | — | — |
| 1972 | 90° | 70° | 80° | — | — |
| 1971 | 90° | 63° | 76° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP