Weather on August 20
Pomona, CA
55 Years of Data
Avg High
88°F
Avg Low
61°F
Warmest
2020
87°F avg
Coldest
1983
66°F avg
About This Date
August 20th in Pomona, CA typically brings warm summer weather, with average highs around 88°F and lows near 61°F — a 27°F daily swing. Over 51 years of records, the warmest August 20th was in 2020 (87°F average), while the coldest was 1983 (66°F) — a 21°F range across recorded history. This date has historically been dry, with little recorded precipitation. 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 20th in Pomona, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 96° | 64° | 80° | — | — |
| 2024 | 101° | 66° | 83° | — | — |
| 2023 | 74° | 62° | 68° | — | — |
| 2022 | 87° | 63° | 75° | — | — |
| 2021 | 81° | 56° | 68° | — | — |
| 2020warmest | 100° | 73° | 87° | — | — |
| 2019 | 91° | 61° | 76° | — | — |
| 2018 | 88° | 64° | 76° | — | — |
| 2017 | 84° | 56° | 70° | — | — |
| 2016 | 86° | 63° | 74° | — | — |
| 2015 | 86° | 58° | 72° | — | — |
| 2014 | 90° | 56° | 73° | — | — |
| 2013 | 92° | 63° | 77° | — | — |
| 2012 | 95° | 67° | 81° | — | — |
| 2011 | 85° | 61° | 73° | — | — |
| 2010 | 97° | 64° | 80° | — | — |
| 2009 | 86° | 59° | 73° | — | — |
| 2008 | 87° | 59° | 73° | — | — |
| 2007 | 99° | 62° | 80° | — | — |
| 2006 | 90° | 59° | 74° | — | — |
| 2005 | 94° | 62° | 78° | — | — |
| 2004 | 89° | 62° | 76° | — | — |
| 2003 | 96° | 67° | 81° | — | — |
| 2002 | 79° | 63° | 71° | — | — |
| 2001 | 91° | 67° | 79° | — | — |
| 2000 | 87° | 59° | 73° | — | — |
| 1999 | 95° | 59° | 77° | — | — |
| 1998 | 90° | 58° | 74° | — | — |
| 1993 | 88° | 54° | 71° | — | — |
| 1992 | 89° | 53° | 71° | — | — |
| 1991 | 87° | 58° | 72° | — | — |
| 1990 | 81° | 59° | 70° | — | — |
| 1989 | 82° | 58° | 70° | — | — |
| 1988 | 84° | 59° | 72° | — | — |
| 1987 | 87° | 50° | 69° | — | — |
| 1986 | 101° | 66° | 83° | — | — |
| 1985 | 84° | 54° | 69° | — | — |
| 1984 | 86° | 67° | 76° | — | — |
| 1983coldest | 77° | 56° | 66° | — | — |
| 1982 | 99° | 60° | 79° | — | — |
| 1981 | 98° | 68° | 83° | — | — |
| 1980 | 84° | 53° | 69° | — | — |
| 1979 | 82° | 64° | 73° | — | — |
| 1978 | 87° | 53° | 70° | — | — |
| 1977 | 89° | 64° | 77° | — | — |
| 1976 | 81° | 62° | 71° | — | — |
| 1975 | 80° | 53° | 67° | — | — |
| 1974 | 82° | 60° | 71° | — | — |
| 1973 | 99° | 69° | 84° | — | — |
| 1972 | 83° | 56° | 69° | — | — |
| 1971 | 87° | 60° | 74° | — | — |
51 years of data from POMONA/FAIRPLEX