Weather on August 18
Temecula, CA
55 Years of Data
Avg High
89°F
Avg Low
60°F
Warmest
2020
89°F avg
Coldest
1976
67°F avg
About This Date
August 18th in Temecula, CA typically brings warm summer weather, with average highs around 89°F and lows near 60°F — a 29°F daily swing. Over 52 years of records, the warmest August 18th was in 2020 (89°F average), while the coldest was 1976 (67°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 4% of August 18th dates historically, with the wettest August 18th recording 2.79" of rain. The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Temecula, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 59° | 75° | — | — |
| 2024 | 91° | 56° | 73° | — | — |
| 2023 | 91° | 61° | 76° | — | — |
| 2022 | 91° | 63° | 77° | — | — |
| 2021 | 74° | 65° | 70° | — | — |
| 2020warmest | 108° | 69° | 89° | — | — |
| 2019 | 85° | 58° | 71° | — | — |
| 2018 | 89° | 66° | 78° | — | — |
| 2017 | 85° | 58° | 71° | — | — |
| 2016 | 95° | 62° | 78° | — | — |
| 2015 | 87° | 62° | 75° | — | — |
| 2014 | 88° | 62° | 75° | — | — |
| 2013 | 86° | 58° | 72° | — | — |
| 2012 | 94° | 70° | 82° | — | — |
| 2011 | 89° | 58° | 74° | — | — |
| 2010 | 98° | 72° | 85° | — | — |
| 2009 | 83° | 55° | 69° | 0.03" | — |
| 2008 | 85° | 61° | 73° | — | — |
| 2007 | 94° | 67° | 80° | — | — |
| 2006 | 88° | 59° | 73° | — | — |
| 2005 | 81° | 54° | 67° | — | — |
| 2004 | 83° | 62° | 72° | — | — |
| 2003 | 89° | 60° | 75° | — | — |
| 2002 | 76° | 58° | 67° | — | — |
| 2001 | 94° | 73° | 83° | — | — |
| 2000 | 88° | 68° | 78° | — | — |
| 1999 | 87° | 67° | 77° | — | — |
| 1998 | 85° | 59° | 72° | — | — |
| 1997 | 87° | 59° | 73° | — | — |
| 1996 | 80° | 57° | 69° | — | — |
| 1995 | 86° | 60° | 73° | — | — |
| 1994 | 89° | 64° | 77° | — | — |
| 1993 | 83° | 59° | 71° | — | — |
| 1991 | 94° | 60° | 77° | — | — |
| 1990 | 86° | 60° | 73° | — | — |
| 1989 | 86° | 57° | 72° | — | — |
| 1988 | 95° | 59° | 77° | — | — |
| 1987 | 93° | 50° | 72° | — | — |
| 1986 | 103° | 63° | 83° | — | — |
| 1985 | 87° | 56° | 71° | — | — |
| 1984 | 87° | 67° | 77° | — | — |
| 1983 | 72° | 67° | 69° | 2.79" | — |
| 1982 | 100° | 54° | 77° | — | — |
| 1981 | 93° | 62° | 78° | — | — |
| 1980 | 86° | 56° | 71° | — | — |
| 1979 | 89° | 59° | 74° | — | — |
| 1978 | 95° | 51° | 73° | — | — |
| 1977 | 85° | 62° | 73° | — | — |
| 1976coldest | 82° | 52° | 67° | — | — |
| 1975 | 88° | 50° | 69° | — | — |
| 1974 | 99° | 55° | 77° | — | — |
| 1973 | 106° | 62° | 84° | — | — |
52 years of data from FALLBROOK 5 NE