Weather on September 20
Temecula, CA
55 Years of Data
Avg High
85°F
Avg Low
57°F
Warmest
2015
89°F avg
Coldest
2007
57°F avg
About This Date
September 20th in Temecula, CA typically brings warm fall weather, with average highs around 85°F and lows near 57°F — a 28°F daily swing. Over 51 years of records, the warmest September 20th was in 2015 (89°F average), while the coldest was 2007 (57°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 20th dates historically, with the wettest September 20th recording 0.53" 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 September 20th in Temecula, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 62° | 76° | — | — |
| 2024 | 80° | 57° | 69° | — | — |
| 2023 | 78° | 60° | 69° | 0.02" | — |
| 2022 | 87° | 57° | 72° | — | — |
| 2021 | 86° | 58° | 72° | — | — |
| 2020 | 86° | 61° | 73° | — | — |
| 2019 | 82° | 57° | 70° | — | — |
| 2018 | 80° | 56° | 68° | — | — |
| 2017 | 78° | 62° | 70° | — | — |
| 2016 | 78° | 69° | 74° | 0.53" | — |
| 2015warmest | 105° | 72° | 89° | — | — |
| 2014 | 81° | 62° | 71° | — | — |
| 2013 | 75° | 60° | 67° | — | — |
| 2012 | 96° | 65° | 81° | — | — |
| 2011 | 84° | 55° | 69° | — | — |
| 2010 | 82° | 55° | 68° | — | — |
| 2009 | 89° | 59° | 74° | — | — |
| 2008 | 79° | 58° | 68° | — | — |
| 2007coldest | 65° | 50° | 57° | — | — |
| 2006 | 80° | 57° | 69° | — | — |
| 2005 | 80° | 62° | 71° | — | — |
| 2004 | 72° | 52° | 62° | — | — |
| 2003 | 91° | 66° | 79° | — | — |
| 2002 | 90° | 67° | 78° | — | — |
| 2001 | 81° | 63° | 72° | — | — |
| 2000 | 79° | 58° | 68° | — | — |
| 1999 | 87° | 54° | 70° | — | — |
| 1998 | 73° | 57° | 65° | — | — |
| 1997 | 81° | 58° | 69° | — | — |
| 1996 | 88° | 60° | 74° | — | — |
| 1995 | 86° | 61° | 73° | — | — |
| 1994 | 86° | 56° | 71° | — | — |
| 1993 | 69° | 55° | 62° | — | — |
| 1991 | 95° | 65° | 80° | — | — |
| 1990 | 88° | 61° | 74° | — | — |
| 1989 | 83° | 46° | 64° | — | — |
| 1988 | 86° | 47° | 66° | — | — |
| 1987 | 89° | 52° | 70° | — | — |
| 1986 | 76° | 48° | 62° | — | — |
| 1985 | 86° | 49° | 67° | — | — |
| 1984 | 99° | 64° | 81° | — | — |
| 1982 | 91° | 48° | 70° | — | — |
| 1981 | 97° | 61° | 79° | — | — |
| 1980 | 85° | 51° | 68° | — | — |
| 1979 | 101° | 58° | 79° | — | — |
| 1978 | 83° | 52° | 67° | — | — |
| 1977 | 81° | 50° | 65° | — | — |
| 1976 | 74° | 60° | 67° | — | — |
| 1975 | 96° | 50° | 73° | — | — |
| 1974 | 100° | 54° | 77° | — | — |
| 1973 | 85° | 46° | 65° | — | — |
51 years of data from FALLBROOK 5 NE