Marin County, CA
: September 2026 so far averaged 65.6°F in Marin County, CA, the warmest 1 to 29 September in the county average since 2022, tied 8th warmest of 76 (with 1979) (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 76.9°F
- Warmest since 2020
- 19th warmest of 76
- Low
- 51.6°F
- Coldest since 2024
- 37th coldest of 76
No measurable precipitation in the county average of Marin County, CA for 4 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 63.5 to 84.9°F
Every year as a table
Every 29 September low of the county average in Marin County, CA since 1951: 51.6°F in 2026; the lowest is 43.5°F, in 1955.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 76.9 | 51.6 |
| 2025 | 63.2 | 57.9 |
| 2024 | 70.8 | 50.5 |
| 2023 | 71.1 | 53.2 |
| 2022 | 69.5 | 52.1 |
| 2021 | 72.1 | 49.7 |
| 2020 | 86.3 | 63.1 |
| 2019 | 63.5 | 47.1 |
| 2018 | 60.9 | 50.4 |
| 2017 | 78.8 | 51.9 |
| 2016 | 72.3 | 48.9 |
| 2015 | 68.5 | 48.9 |
| 2014 | 68.8 | 54.6 |
| 2013 | 76.2 | 52.9 |
| 2012 | 63.6 | 49.1 |
| 2011 | 87.4 | 63 |
| 2010 | 94.2 | 66.6 |
| 2009 | 66.1 | 48.9 |
| 2008 | 73 | 51 |
| 2007 | 61.3 | 46 |
| 2006 | 63.6 | 49.5 |
| 2005 | 82.1 | 53.9 |
| 2004 | 63.4 | 52.3 |
| 2003 | 65.3 | 52 |
| 2002 | 65.1 | 48.7 |
| 2001 | 72.4 | 49.4 |
| 2000 | 63.5 | 50 |
| 1999 | 84 | 58.6 |
| 1998 | 66.5 | 51.7 |
| 1997 | 84.7 | 59.4 |
| 1996 | 67.3 | 50.9 |
| 1995 | 69.8 | 51.5 |
| 1994 | 70.6 | 52.5 |
| 1993 | 76.2 | 52.7 |
| 1992 | 77.4 | 54.5 |
| 1991 | 75.8 | 52.1 |
| 1990 | 78.2 | 54.3 |
| 1989 | 65.8 | 53.8 |
| 1988 | 80.9 | 49.6 |
| 1987 | 77.9 | 52.4 |
| 1986 | 69.3 | 47.1 |
| 1985 | 61.9 | 49.4 |
| 1984 | 76.2 | 52.4 |
| 1983 | 68.4 | 52 |
| 1982 | 66.5 | 50.3 |
| 1981 | 67.9 | 48.1 |
| 1980 | 78.4 | 51.2 |
| 1979 | 74 | 52 |
| 1978 | 80.9 | 53.9 |
| 1977 | 63.4 | 57.8 |
| 1976 | 61.7 | 55.5 |
| 1975 | 66.7 | 49.1 |
| 1974 | 68.2 | 49.4 |
| 1973 | 78.9 | 50.2 |
| 1972 | 73.4 | 52.5 |
| 1971 | 62.9 | 46.3 |
| 1970 | 81.6 | 52.2 |
| 1969 | 75.2 | 54.5 |
| 1968 | 67.7 | 52.9 |
| 1967 | 65.9 | 55 |
| 1966 | 89.4 | 60.3 |
| 1965 | 71.4 | 45.9 |
| 1964 | 65.5 | 47.6 |
| 1963 | 75.4 | 54.1 |
| 1962 | 67.1 | 50.8 |
| 1961 | 69.3 | 45.7 |
| 1960 | 63.3 | 51.4 |
| 1959 | 72 | 55.5 |
| 1958 | 80.2 | 53.1 |
| 1957 | 66.1 | 54.2 |
| 1956 | 81.4 | 50.5 |
| 1955 | 66.7 | 43.5 |
| 1954 | 64.7 | 46.3 |
| 1953 | 69.8 | 46.9 |
| 1952 | 75.1 | 49.2 |
| 1951 | 64 | 54.8 |
The month
August 2026 averaged 63.3°F in Marin County, CA, the warmest August in the county average since 2025, tied 22nd warmest of 132 (with 2009, 1996 and 1969) (county average from NOAA's monthly county data, 1895 to 2026).
The month in words
- Tuesday 29 September 2026: a high of 76.9°F averaged over Marin County, CA, the warmest 29 September in the county average since 2020, 19th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 51.6°F averaged over Marin County, CA, the coldest 29 September night in the county average since 2024, 37th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
San Francisco Airport, CA 36.4 mi, the nearest city with its own station