October weather in Petaluma, CA
The average temperature in Petaluma in October is 62.0°F (47.6°F–76.4°F). Average precipitation: 1.27 inches.
October is a fall month in Petaluma, and is warmer than the annual average of 58°F. Daily temperatures swing about 28.8°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 10h 59m. For travel, October is a comfortable month to visit.
Avg High
76.4°F
Avg Low
47.6°F
Precipitation
1.27 in
Daylight
10h 59m
October records in Petaluma
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 102.9°F (1980) | 37.0°F (1925) | 0.65 in (1926) |
| October 2 | 106.0°F (1980) | 37.9°F (1917) | 1.04 in (2018) |
| October 3 | 102.0°F (1980) | 39.0°F (1914) | 0.78 in (1922) |
| October 4 | 102.9°F (1933) | 36.0°F (1914) | 0.18 in (2011) |
| October 5 | 102.9°F (1933) | 37.0°F (1919) | 1.20 in (1994) |
| October 6 | 102.0°F (2024) | 35.1°F (1913) | 1.13 in (1920) |
| October 7 | 100.9°F (2024) | 37.0°F (1941) | 0.34 in (1947) |
| October 8 | 100.0°F (1996) | 34.0°F (1941) | 0.12 in (1973) |
| October 9 | 102.0°F (1996) | 37.0°F (1913) | 1.10 in (1957) |
| October 10 | 95.0°F (1934) | 35.1°F (1913) | 0.90 in (1984) |
| October 11 | 95.0°F (1983) | 34.0°F (1915) | 1.21 in (1975) |
| October 12 | 96.1°F (1971) | 34.0°F (1915) | 2.70 in (1962) |
| October 13 | 95.0°F (1978) | 37.9°F (1925) | 2.94 in (1962) |
| October 14 | 98.1°F (1961) | 35.1°F (1985) | 0.57 in (1937) |
| October 15 | 99.0°F (1961) | 36.0°F (1966) | 1.50 in (1969) |
| October 16 | 100.0°F (1933) | 36.0°F (1981) | 0.72 in (2016) |
| October 17 | 96.1°F (1974) | 36.0°F (1934) | 1.09 in (1984) |
| October 18 | 93.9°F (1988) | 30.9°F (1917) | 1.07 in (1894) |
| October 19 | 96.1°F (1913) | 30.9°F (1919) | 1.55 in (2004) |
| October 20 | 93.0°F (1929) | 32.0°F (1919) | 0.87 in (1985) |
| October 21 | 91.0°F (1929) | 33.1°F (1925) | 0.43 in (2021) |
| October 22 | 91.9°F (1929) | 34.0°F (1919) | 1.08 in (2012) |
| October 23 | 91.9°F (1929) | 34.0°F (1961) | 1.11 in (1957) |
| October 24 | 93.0°F (1965) | 33.1°F (1935) | 5.17 in (2021) |
| October 25 | 95.0°F (1925) | 30.9°F (1919) | 1.37 in (2016) |
| October 26 | 91.9°F (1993) | 27.0°F (1919) | 1.44 in (2004) |
| October 27 | 89.1°F (2003) | 28.9°F (1919) | 1.38 in (1941) |
| October 28 | 89.1°F (2003) | 28.9°F (1919) | 1.37 in (2016) |
| October 29 | 89.1°F (1955) | 32.0°F (1916) | 1.53 in (1964) |
| October 30 | 87.1°F (1965) | 25.0°F (1948) | 1.02 in (1956) |
| October 31 | 88.0°F (1966) | 26.1°F (1935) | 0.89 in (1934) |