Weather on August 18
Pomona, CA
55 Years of Data
Avg High
88°F
Avg Low
62°F
Warmest
2020
89°F avg
Coldest
1975
66°F avg
About This Date
August 18th in Pomona, CA typically brings warm summer weather, with average highs around 88°F and lows near 62°F — a 26°F daily swing. Over 51 years of records, the warmest August 18th was in 2020 (89°F average), while the coldest was 1975 (66°F) — a 23°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 3.1" 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 August 18th in Pomona, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 61° | 76° | — | — |
| 2024 | 92° | 59° | 75° | — | — |
| 2023 | 93° | 65° | 79° | — | — |
| 2022 | 92° | 68° | 80° | — | — |
| 2021 | 77° | 64° | 71° | — | — |
| 2020warmest | 105° | 74° | 89° | — | — |
| 2019 | 84° | 55° | 70° | — | — |
| 2018 | 89° | 67° | 78° | — | — |
| 2017 | 84° | 60° | 72° | — | — |
| 2016 | 95° | 64° | 80° | — | — |
| 2015 | 88° | 61° | 74° | — | — |
| 2014 | 93° | 61° | 77° | — | — |
| 2013 | 91° | 66° | 79° | — | — |
| 2012 | 98° | 72° | 85° | — | — |
| 2011 | 93° | 63° | 78° | — | — |
| 2010 | 98° | 69° | 84° | — | — |
| 2009 | 86° | 59° | 73° | — | — |
| 2008 | 88° | 63° | 75° | — | — |
| 2007 | 100° | 66° | 83° | — | — |
| 2006 | 93° | 61° | 77° | — | — |
| 2005 | 90° | 61° | 75° | — | — |
| 2004 | 92° | 63° | 77° | — | — |
| 2003 | 97° | 66° | 81° | — | — |
| 2002 | 81° | 64° | 72° | — | — |
| 2001 | 95° | 64° | 80° | — | — |
| 2000 | 92° | 65° | 78° | — | — |
| 1999 | 93° | 57° | 75° | — | — |
| 1998 | 86° | 56° | 71° | — | — |
| 1993 | 88° | 55° | 71° | — | — |
| 1992 | 90° | 63° | 76° | — | — |
| 1991 | 85° | 64° | 74° | — | — |
| 1990 | 82° | 57° | 70° | — | — |
| 1989 | 85° | 57° | 71° | — | — |
| 1988 | 85° | 53° | 69° | — | — |
| 1987 | 80° | 54° | 67° | — | — |
| 1986 | 102° | 65° | 83° | — | — |
| 1985 | 84° | 60° | 72° | — | — |
| 1984 | 81° | 68° | 74° | — | — |
| 1983 | 71° | 69° | 70° | 0.89" | — |
| 1982 | 90° | 59° | 74° | — | — |
| 1981 | 86° | 67° | 76° | — | — |
| 1980 | 84° | 61° | 72° | — | — |
| 1979 | 84° | 63° | 73° | — | — |
| 1978 | 82° | 52° | 67° | — | — |
| 1977 | 70° | 68° | 69° | 3.1" | — |
| 1976 | 80° | 56° | 68° | — | — |
| 1975coldest | 81° | 52° | 66° | — | — |
| 1974 | 91° | 54° | 72° | — | — |
| 1973 | 89° | 62° | 76° | — | — |
| 1972 | 86° | 60° | 73° | — | — |
| 1971 | 89° | 62° | 76° | — | — |
51 years of data from POMONA/FAIRPLEX