Weather on August 20
Modesto, CA
55 Years of Data
Avg High
90°F
Avg Low
61°F
Warmest
1992
85°F avg
Coldest
1979
69°F avg
About This Date
August 20th in Modesto, CA typically brings hot summer weather, with average highs around 90°F and lows near 61°F — a 29°F daily swing. Over 55 years of records, the warmest August 20th was in 1992 (85°F average), while the coldest was 1979 (69°F) — a 16°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in Modesto, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 97° | 62° | 79° | — | — |
| 2024 | 95° | 63° | 79° | — | — |
| 2023 | 87° | 69° | 78° | — | — |
| 2022 | 101° | 64° | 82° | — | — |
| 2021 | 87° | 61° | 74° | — | — |
| 2020 | 91° | 72° | 81° | — | — |
| 2019 | 88° | 61° | 74° | — | — |
| 2018 | 93° | 62° | 78° | — | — |
| 2017 | 91° | 62° | 77° | — | — |
| 2016 | 97° | 65° | 81° | — | — |
| 2015 | 91° | 61° | 76° | — | — |
| 2014 | 86° | 61° | 73° | — | — |
| 2013 | 96° | 70° | 83° | — | — |
| 2012 | 96° | 61° | 78° | — | — |
| 2011 | 89° | 57° | 73° | — | — |
| 2010 | 94° | 61° | 77° | — | — |
| 2009 | 90° | 59° | 74° | — | — |
| 2008 | 92° | 61° | 76° | — | — |
| 2007 | 96° | 66° | 81° | — | — |
| 2006 | 91° | 59° | 75° | — | — |
| 2005 | 92° | 58° | 75° | — | — |
| 2004 | 93° | 61° | 77° | — | — |
| 2003 | 96° | 61° | 78° | — | — |
| 2002 | 90° | 55° | 72° | — | — |
| 2001 | 86° | 57° | 72° | — | — |
| 2000 | 87° | 53° | 70° | — | — |
| 1999 | 93° | 62° | 78° | — | — |
| 1998 | 85° | 57° | 71° | — | — |
| 1997 | 83° | 66° | 74° | — | — |
| 1996 | 86° | 54° | 70° | — | — |
| 1995 | 98° | 66° | 82° | — | — |
| 1994 | 92° | 62° | 77° | — | — |
| 1993 | 82° | 58° | 70° | — | — |
| 1992warmest | 101° | 70° | 85° | — | — |
| 1991 | 88° | 58° | 73° | — | — |
| 1990 | 89° | 60° | 75° | — | — |
| 1989 | 83° | 57° | 70° | — | — |
| 1988 | 93° | 59° | 76° | — | — |
| 1987 | 81° | 58° | 69° | — | — |
| 1986 | 90° | 69° | 79° | — | — |
| 1985 | 92° | 56° | 74° | — | — |
| 1984 | 92° | 57° | 74° | — | — |
| 1983 | 83° | 67° | 75° | — | — |
| 1982 | 95° | 63° | 79° | — | — |
| 1981 | 88° | 56° | 72° | — | — |
| 1980 | 89° | 59° | 74° | — | — |
| 1979coldest | 81° | 58° | 69° | — | — |
| 1978 | 91° | 59° | 75° | — | — |
| 1977 | 90° | 61° | 75° | — | — |
| 1976 | 86° | 60° | 73° | — | — |
| 1975 | 87° | 60° | 74° | — | — |
| 1974 | 91° | 59° | 75° | — | — |
| 1973 | 96° | 58° | 77° | — | — |
| 1972 | 89° | 59° | 74° | — | — |
| 1971 | 89° | 55° | 72° | — | — |
55 years of data from MODESTO AP