Weather on August 20
Riverside, CA
55 Years of Data
Avg High
93°F
Avg Low
62°F
Warmest
1992
88°F avg
Coldest
1991
69°F avg
About This Date
August 20th in Riverside, CA typically brings hot summer weather, with average highs around 93°F and lows near 62°F — a 31°F daily swing. Over 55 years of records, the warmest August 20th was in 1992 (88°F average), while the coldest was 1991 (69°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 4% of August 20th dates historically, with the wettest August 20th recording 4.65" of rain. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in Riverside, 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 | 100° | 66° | 83° | — | — |
| 2024 | 105° | 65° | 85° | — | — |
| 2023 | 78° | 66° | 72° | 4.65" | — |
| 2022 | 91° | 67° | 79° | — | — |
| 2021 | 85° | 64° | 74° | — | — |
| 2020 | 103° | 74° | 88° | — | — |
| 2019 | 97° | 62° | 79° | — | — |
| 2018 | 93° | 68° | 81° | — | — |
| 2017 | 90° | 62° | 76° | — | — |
| 2016 | 93° | 65° | 79° | — | — |
| 2015 | 90° | 66° | 78° | — | — |
| 2014 | 84° | 63° | 73° | 0.23" | — |
| 2013 | 95° | 65° | 80° | — | — |
| 2012 | 98° | 72° | 85° | — | — |
| 2011 | 87° | 61° | 74° | — | — |
| 2010 | 99° | 68° | 83° | — | — |
| 2009 | 92° | 61° | 76° | — | — |
| 2008 | 91° | 60° | 76° | — | — |
| 2007 | 103° | 66° | 84° | — | — |
| 2006 | 91° | 58° | 74° | — | — |
| 2005 | 95° | 58° | 76° | — | — |
| 2004 | 87° | 60° | 74° | — | — |
| 2003 | 96° | 66° | 81° | — | — |
| 2002 | 80° | 63° | 71° | — | — |
| 2001 | 91° | 62° | 77° | — | — |
| 2000 | 91° | 57° | 74° | — | — |
| 1999 | 96° | 63° | 79° | — | — |
| 1998 | 93° | 57° | 75° | — | — |
| 1997 | 98° | 69° | 84° | — | — |
| 1996 | 96° | 61° | 78° | — | — |
| 1995 | 97° | 62° | 79° | — | — |
| 1994 | 98° | 56° | 77° | — | — |
| 1993 | 93° | 59° | 76° | — | — |
| 1992warmest | 106° | 71° | 88° | — | — |
| 1991coldest | 96° | 41° | 69° | — | — |
| 1990 | 86° | 60° | 73° | — | — |
| 1989 | 83° | 60° | 71° | — | — |
| 1988 | 88° | 60° | 74° | — | — |
| 1987 | 93° | 60° | 77° | — | — |
| 1986 | 105° | 69° | 87° | — | — |
| 1985 | 90° | 57° | 73° | — | — |
| 1984 | 91° | 69° | 80° | — | — |
| 1983 | 82° | 68° | 75° | — | — |
| 1982 | 103° | 64° | 83° | — | — |
| 1981 | 102° | 61° | 81° | — | — |
| 1980 | 88° | 57° | 72° | — | — |
| 1979 | 85° | 65° | 75° | — | — |
| 1978 | 95° | 56° | 75° | — | — |
| 1977 | 98° | 68° | 83° | — | — |
| 1976 | 88° | 60° | 74° | — | — |
| 1975 | 85° | 56° | 70° | — | — |
| 1974 | 85° | 58° | 71° | — | — |
| 1973 | 98° | 64° | 81° | — | — |
| 1972 | 94° | 54° | 74° | — | — |
| 1971 | 91° | 61° | 76° | — | — |
55 years of data from RIVERSIDE MUNI AP