Weather on September 27
Antioch, CA
55 Years of Data
Avg High
82°F
Avg Low
57°F
Warmest
2024
81°F avg
Coldest
1998
58°F avg
About This Date
September 27th in Antioch, CA typically brings warm fall weather, with average highs around 82°F and lows near 57°F — a 25°F daily swing. Over 55 years of records, the warmest September 27th was in 2024 (81°F average), while the coldest was 1998 (58°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 5% of September 27th dates historically, with the wettest September 27th recording 0.86" of rain. The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
Planning for September 27th in Antioch, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 57° | 68° | — | — |
| 2024warmest | 91° | 71° | 81° | — | — |
| 2023 | 75° | 56° | 65° | — | — |
| 2022 | 75° | 53° | 64° | — | — |
| 2021 | 66° | 51° | 59° | — | — |
| 2020 | 91° | 70° | 80° | — | — |
| 2019 | 79° | 58° | 68° | — | — |
| 2018 | 89° | 68° | 79° | — | — |
| 2017 | 85° | 66° | 75° | — | — |
| 2016 | 95° | 62° | 79° | — | — |
| 2015 | 88° | 61° | 74° | — | — |
| 2014 | 79° | 57° | 68° | — | — |
| 2013 | 78° | 59° | 69° | — | — |
| 2012 | 92° | 56° | 74° | — | — |
| 2011 | 89° | 60° | 75° | — | — |
| 2010 | 96° | 64° | 80° | — | — |
| 2009 | 100° | 61° | 80° | — | — |
| 2008 | 92° | 63° | 77° | — | — |
| 2007 | 72° | 49° | 60° | — | — |
| 2006 | 81° | 53° | 67° | — | — |
| 2005 | 83° | 57° | 70° | — | — |
| 2004 | 83° | 55° | 69° | — | — |
| 2003 | 82° | 54° | 68° | — | — |
| 2002 | 71° | 57° | 64° | — | — |
| 2001 | 79° | 55° | 67° | — | — |
| 2000 | 79° | 58° | 68° | — | — |
| 1999 | 90° | 70° | 80° | — | — |
| 1998coldest | 63° | 53° | 58° | 0.86" | — |
| 1997 | 83° | 64° | 73° | — | — |
| 1996 | 83° | 54° | 68° | — | — |
| 1995 | 82° | 55° | 69° | — | — |
| 1994 | 92° | 59° | 75° | — | — |
| 1993 | 93° | 57° | 75° | — | — |
| 1992 | 93° | 58° | 75° | — | — |
| 1991 | 85° | 55° | 70° | — | — |
| 1990 | 79° | 58° | 68° | — | — |
| 1989 | 78° | 53° | 66° | — | — |
| 1988 | 81° | 53° | 67° | — | — |
| 1987 | 89° | 55° | 72° | — | — |
| 1986 | 72° | 51° | 61° | 0.61" | — |
| 1985 | 81° | 60° | 70° | — | — |
| 1984 | 91° | 59° | 75° | — | — |
| 1983 | 79° | 56° | 67° | — | — |
| 1982 | 77° | 55° | 66° | — | — |
| 1981 | 82° | 55° | 69° | — | — |
| 1980 | 81° | 52° | 66° | — | — |
| 1979 | 82° | 50° | 66° | — | — |
| 1978 | 83° | 55° | 69° | — | — |
| 1977 | 81° | 51° | 66° | — | — |
| 1976 | 79° | 57° | 68° | — | — |
| 1975 | 91° | 52° | 71° | — | — |
| 1974 | 74° | 52° | 63° | — | — |
| 1973 | 85° | 56° | 70° | — | — |
| 1972 | 70° | 57° | 63° | 0.58" | — |
| 1971 | 70° | 52° | 61° | — | — |
55 years of data from ANTIOCH FIBREBRD MILLS