Weather on September 18
Corona, CA
55 Years of Data
Avg High
88°F
Avg Low
57°F
Warmest
1984
85°F avg
Coldest
1973
63°F avg
About This Date
September 18th in Corona, CA typically brings warm fall weather, with average highs around 88°F and lows near 57°F — a 31°F daily swing. Over 45 years of records, the warmest September 18th was in 1984 (85°F average), while the coldest was 1973 (63°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 9% of September 18th dates historically. The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
Planning for September 18th in Corona, CA? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 69° | 78° | 0.15" | — |
| 2024 | 80° | 49° | 64° | — | — |
| 2023 | 81° | 57° | 69° | — | — |
| 2022 | 82° | 59° | 71° | — | — |
| 2021 | 82° | 54° | 68° | — | — |
| 2020 | 99° | 58° | 78° | — | — |
| 2019 | 86° | 54° | 70° | — | — |
| 2018 | 89° | 44° | 67° | — | — |
| 2017 | 81° | 52° | 66° | — | — |
| 2016 | 102° | 48° | 75° | — | — |
| 2015 | 93° | 55° | 74° | — | — |
| 2014 | 85° | 62° | 73° | — | — |
| 2013 | 81° | 55° | 68° | — | — |
| 2012 | 89° | 52° | 70° | — | — |
| 2011 | 91° | 56° | 73° | — | — |
| 2010 | 89° | 54° | 71° | — | — |
| 2009 | 99° | 66° | 82° | — | — |
| 2008 | 95° | 65° | 80° | — | — |
| 2007 | 83° | 55° | 69° | — | — |
| 2006 | 95° | 51° | 73° | — | — |
| 2005 | 85° | 54° | 69° | — | — |
| 2004 | 85° | 61° | 73° | — | — |
| 2003 | 95° | 58° | 76° | — | — |
| 2002 | 83° | 59° | 71° | — | — |
| 2001 | 85° | 56° | 70° | — | — |
| 2000 | 99° | 63° | 81° | — | — |
| 1999 | 71° | 57° | 64° | — | — |
| 1998 | 90° | 53° | 71° | — | — |
| 1987 | 87° | 52° | 69° | — | — |
| 1986 | 84° | 53° | 69° | — | — |
| 1985 | 76° | 61° | 68° | 0.15" | — |
| 1984warmest | 101° | 70° | 85° | 0.05" | — |
| 1983 | 98° | 61° | 79° | — | — |
| 1982 | 87° | 62° | 75° | 0.03" | — |
| 1981 | 97° | 65° | 81° | — | — |
| 1980 | 98° | 58° | 78° | — | — |
| 1979 | 104° | 60° | 82° | — | — |
| 1978 | 88° | 53° | 70° | — | — |
| 1977 | 85° | 54° | 69° | — | — |
| 1976 | 79° | 54° | 66° | — | — |
| 1975 | 93° | 63° | 78° | — | — |
| 1974 | 89° | 55° | 72° | — | — |
| 1973coldest | 80° | 46° | 63° | — | — |
| 1972 | 79° | 52° | 65° | — | — |
| 1971 | 95° | 62° | 79° | — | — |
45 years of data from CORONA CALIFORNIA