Weather on August 20
San Francisco, CA
55 Years of Data
About This Date
August 20th in San Francisco, CA typically brings mild summer weather, with average highs around 68°F and lows near 56°F. Over 55 years of records, the warmest August 20th was in 2023 (70°F average), while the coldest was 2001 (56°F) — a 14°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 20th dates historically. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in San Francisco, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 56° | 65° | — | — |
| 2024 | 74° | 55° | 64° | — | — |
| 2023warmest | 83° | 58° | 70° | — | — |
| 2022 | 69° | 56° | 62° | — | — |
| 2021 | 64° | 59° | 62° | — | — |
| 2020 | 72° | 54° | 63° | — | — |
| 2019 | 65° | 59° | 62° | — | — |
| 2018 | 61° | 54° | 57° | — | — |
| 2017 | 70° | 59° | 64° | — | — |
| 2016 | 63° | 57° | 60° | — | — |
| 2015 | 65° | 60° | 62° | — | — |
| 2014 | 67° | 60° | 63° | — | — |
| 2013 | 69° | 57° | 63° | — | — |
| 2012 | 61° | 52° | 56° | — | — |
| 2011 | 67° | 54° | 60° | — | — |
| 2010 | 62° | 53° | 58° | — | — |
| 2009 | 65° | 56° | 60° | — | — |
| 2008 | 71° | 57° | 64° | — | — |
| 2007 | 69° | 58° | 63° | — | — |
| 2006 | 61° | 53° | 57° | — | — |
| 2005 | 61° | 54° | 57° | — | — |
| 2004 | 70° | 58° | 64° | — | — |
| 2003 | 70° | 58° | 64° | — | — |
| 2002 | 65° | 53° | 59° | — | — |
| 2001coldest | 60° | 52° | 56° | — | — |
| 2000 | 68° | 52° | 60° | — | — |
| 1999 | 66° | 55° | 61° | — | — |
| 1998 | 62° | 54° | 58° | — | — |
| 1997 | 71° | 57° | 64° | 0.48" | — |
| 1996 | 71° | 55° | 63° | — | — |
| 1995 | 73° | 58° | 65° | — | — |
| 1994 | 72° | 54° | 63° | — | — |
| 1993 | 71° | 57° | 64° | — | — |
| 1992 | 65° | 52° | 58° | — | — |
| 1991 | 66° | 57° | 62° | — | — |
| 1990 | 72° | 58° | 65° | — | — |
| 1989 | 70° | 56° | 63° | — | — |
| 1988 | 70° | 57° | 63° | — | — |
| 1987 | 71° | 57° | 64° | — | — |
| 1986 | 65° | 56° | 60° | — | — |
| 1985 | 68° | 58° | 63° | — | — |
| 1984 | 69° | 55° | 62° | — | — |
| 1983 | 75° | 60° | 68° | — | — |
| 1982 | 67° | 52° | 59° | — | — |
| 1981 | 64° | 54° | 59° | — | — |
| 1980 | 65° | 54° | 59° | — | — |
| 1979 | 69° | 57° | 63° | — | — |
| 1978 | 66° | 57° | 62° | — | — |
| 1977 | 63° | 56° | 59° | — | — |
| 1976 | 79° | 59° | 69° | — | — |
| 1975 | 65° | 52° | 58° | — | — |
| 1974 | 78° | 55° | 67° | — | — |
| 1973 | 63° | 52° | 57° | — | — |
| 1972 | 70° | 60° | 65° | — | — |
| 1971 | 64° | 55° | 60° | — | — |
San Francisco, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Francisco, CA Monthly Precipitation
Average rainfall per month, in inches.
San Francisco, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit San Francisco, CA
Most pleasant months in San Francisco, CA: July, August.