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San Mateo, CA Weather on August 25
August 25th in San Mateo, CA typically brings pleasant summer weather, with average highs around 73°F and lows near 57°F. Over 55 years of records, the warmest August 25th was in 1988 (74°F average), while the coldest was 1995 (57°F) — a 17°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.
What to Expect on August 25
Planning for August 25th in San Mateo, CA? Great weather for outdoor activities.
August 25 Weather Records for San Mateo
- •The all-time record high for August 25th in San Mateo, CA is 93°F, set in 1988.
- •The coldest August 25th on record dropped to 50°F in 1973.
- •Temperatures have reached 90°F or higher on August 25th in 1 of the last 55 years.
Frequently Asked Questions
What was the warmest August 25 ever in San Mateo?
The warmest August 25 in San Mateo, CA reached 93°F in 1988. That is 20°F above the long-term average high of 73°F.
What was the coldest August 25 ever in San Mateo?
The coldest August 25 in San Mateo, CA dropped to 50°F in 1973. That is 7°F below the long-term average low of 57°F.
What is the average temperature on August 25 in San Mateo?
On August 25, San Mateo averages a high of 73°F and a low of 57°F based on 55 years of NOAA weather observations from BURLINGAME.
How many years of weather data are available for August 25 in San Mateo?
We have 55 years of weather records for August 25 in San Mateo, 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 25 Weather History in San Mateo
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 71°F | 61°F | 0" | -- |
| 2024 | 78°F | 56°F | 0" | -- |
| 2023 | 72°F | 61°F | 0" | -- |
| 2022 | 76°F | 59°F | 0" | -- |
| 2021 | 69°F | 56°F | 0" | -- |
| 2020 | 71°F | 58°F | 0" | -- |
| 2019 | 73°F | 58°F | 0" | -- |
| 2018 | 71°F | 55°F | 0" | -- |
| 2017 | 69°F | 55°F | 0" | -- |
| 2016 | 70°F | 56°F | 0" | -- |
| 2015 | 71°F | 58°F | 0" | -- |
| 2014 | 74°F | 61°F | 0" | -- |
| 2013 | 73°F | 62°F | 0" | -- |
| 2012 | 67°F | 53°F | 0" | -- |
| 2011 | 69°F | 57°F | 0" | -- |
| 2010 | 85°F | 62°F | 0" | -- |
| 2009 | 71°F | 54°F | 0" | -- |
| 2008 | 71°F | 58°F | 0" | -- |
| 2007 | 73°F | 58°F | 0" | -- |
| 2006 | 71°F | 56°F | 0" | -- |
| 2005 | 70°F | 57°F | 0" | -- |
| 2004 | 76°F | 61°F | 0" | -- |
| 2003 | 86°F | 61°F | 0" | -- |
| 2002 | 66°F | 55°F | 0" | -- |
| 2001 | 70°F | 54°F | 0" | -- |
| 2000 | 73°F | 53°F | 0" | -- |
| 1999 | 83°F | 53°F | 0" | -- |
| 1998 | 65°F | 54°F | 0" | -- |
| 1997 | 76°F | 63°F | 0" | -- |
| 1996 | 70°F | 55°F | 0" | -- |
| 1995 | 63°F | 52°F | 0" | -- |
| 1994 | 74°F | 54°F | 0" | -- |
| 1993 | 84°F | 56°F | 0" | -- |
| 1992 | 72°F | 55°F | 0" | -- |
| 1991 | 72°F | 57°F | 0" | -- |
| 1990 | 72°F | 60°F | 0" | -- |
| 1989 | 79°F | 53°F | 0" | -- |
| 1988 | 93°F | 55°F | 0" | -- |
| 1987 | 78°F | 58°F | 0" | -- |
| 1986 | 74°F | 53°F | 0" | -- |
| 1985 | 67°F | 56°F | 0" | -- |
| 1984 | 69°F | 56°F | 0" | -- |
| 1983 | 70°F | 60°F | 0" | -- |
| 1982 | 63°F | 56°F | 0" | -- |
| 1981 | 73°F | 54°F | 0" | -- |
| 1980 | 68°F | 53°F | 0" | -- |
| 1979 | 70°F | 59°F | 0" | -- |
| 1978 | 83°F | 64°F | 0" | -- |
| 1977 | 79°F | 56°F | 0" | -- |
| 1976 | 73°F | 57°F | 0" | -- |
| 1975 | 82°F | 55°F | 0" | -- |
| 1974 | 74°F | 56°F | 0" | -- |
| 1973 | 72°F | 50°F | 0" | -- |
| 1972 | 79°F | 54°F | 0" | -- |
| 1971 | 76°F | 62°F | 0" | -- |
Based on 55 years of data from NOAA station: BURLINGAME
Monthly Climate Averages
Historical temperature and precipitation averages for San Mateo, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.