W.carter / CC BY-SA 4.0
San Francisco, CA Weather on August 12
San Francisco hits 85°F on August 12, breaking typical summer chill
August 12 in San Francisco typically brings mild conditions with highs near 68°F and lows around 55°F, but the record books tell a different story. In 1996, the city experienced an exceptional 85°F on this date, a remarkable 17-degree spike above normal that stands as the high-water mark across 55 years of August 12 records. Even the record low of 51°F in 1980 shows relatively restrained variability for a summer date in the Bay Area.
What to Expect on August 12
Planning for August 12th in San Francisco, CA? Great weather for outdoor activities.
Frequently Asked Questions
What was the warmest August 12 ever in San Francisco?
The warmest August 12 in San Francisco, CA reached 85°F in 1996. That is 17°F above the long-term average high of 68°F.
What was the coldest August 12 ever in San Francisco?
The coldest August 12 in San Francisco, CA dropped to 51°F in 1980. That is 4°F below the long-term average low of 55°F.
What is the average temperature on August 12 in San Francisco?
On August 12, San Francisco averages a high of 68°F and a low of 55°F based on 55 years of NOAA weather observations from SAN FRANCISCO DWTN.
How many years of weather data are available for August 12 in San Francisco?
We have 55 years of weather records for August 12 in San Francisco, CA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
August 12 Weather History in San Francisco
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 63°F | 57°F | 0" | -- |
| 2024 | 63°F | 54°F | 0" | -- |
| 2023 | 68°F | 56°F | 0" | -- |
| 2022 | 70°F | 59°F | 0" | -- |
| 2021 | 65°F | 57°F | 0" | -- |
| 2020 | 64°F | 57°F | 0" | -- |
| 2019 | 77°F | 59°F | 0" | -- |
| 2018 | 67°F | 57°F | 0" | -- |
| 2017 | 63°F | 55°F | 0" | -- |
| 2016 | 63°F | 54°F | 0" | -- |
| 2015 | 76°F | 58°F | 0" | -- |
| 2014 | 70°F | 59°F | 0" | -- |
| 2013 | 69°F | 55°F | 0" | -- |
| 2012 | 62°F | 52°F | 0" | -- |
| 2011 | 66°F | 54°F | 0" | -- |
| 2010 | 65°F | 52°F | 0" | -- |
| 2009 | 76°F | 55°F | 0" | -- |
| 2008 | 73°F | 54°F | 0" | -- |
| 2007 | 65°F | 53°F | 0" | -- |
| 2006 | 67°F | 55°F | 0" | -- |
| 2005 | 68°F | 55°F | 0" | -- |
| 2004 | 65°F | 56°F | 0" | -- |
| 2003 | 70°F | 55°F | 0" | -- |
| 2002 | 63°F | 53°F | 0" | -- |
| 2001 | 67°F | 55°F | 0" | -- |
| 2000 | 67°F | 54°F | 0" | -- |
| 1999 | 66°F | 56°F | 0" | -- |
| 1998 | 75°F | 55°F | 0" | -- |
| 1997 | 70°F | 57°F | 0" | -- |
| 1996 | 85°F | 60°F | 0" | -- |
| 1995 | 83°F | 54°F | 0" | -- |
| 1994 | 79°F | 55°F | 0" | -- |
| 1993 | 67°F | 57°F | 0" | -- |
| 1992 | 69°F | 60°F | 0" | -- |
| 1991 | 70°F | 57°F | 0" | -- |
| 1990 | 67°F | 56°F | 0" | -- |
| 1989 | 68°F | 55°F | 0" | -- |
| 1988 | 66°F | 56°F | 0" | -- |
| 1987 | 67°F | 58°F | 0" | -- |
| 1986 | 70°F | 54°F | 0" | -- |
| 1985 | 67°F | 59°F | 0" | -- |
| 1984 | 70°F | 54°F | 0" | -- |
| 1983 | 72°F | 57°F | 0" | -- |
| 1982 | 66°F | 54°F | 0" | -- |
| 1981 | 64°F | 55°F | 0" | -- |
| 1980 | 58°F | 51°F | 0" | -- |
| 1979 | 64°F | 53°F | 0" | -- |
| 1978 | 66°F | 56°F | 0" | -- |
| 1977 | 63°F | 56°F | 0" | -- |
| 1976 | 61°F | 52°F | 0" | -- |
| 1975 | 62°F | 53°F | 0" | -- |
| 1974 | 64°F | 57°F | 0" | -- |
| 1973 | 59°F | 52°F | 0" | -- |
| 1972 | 64°F | 55°F | 0" | -- |
| 1971 | 60°F | 54°F | 0" | -- |
Based on 55 years of data from NOAA station: SAN FRANCISCO DWTN
How Has August 12 Changed?
The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
Monthly Climate Averages
Historical temperature and precipitation averages for San Francisco, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.