October weather in Foster City, CA
The average temperature in Foster City in October is 62.2°F (49.8°F–74.6°F). Average precipitation: 0.87 inches.
October is a fall month in Foster City, and is warmer than the annual average of 59.4°F. Daily temperatures swing about 24.8°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 11h 0m. For travel, October is a comfortable month to visit.
Avg High
74.6°F
Avg Low
49.8°F
Precipitation
0.87 in
Daylight
11h 0m
October records in Foster City
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 102.9°F (1980) | 39.9°F (1950) | 0.67 in (1983) |
| October 2 | 104.0°F (1980) | 39.9°F (1950) | 0.80 in (1909) |
| October 3 | 102.9°F (1980) | 42.1°F (1931) | 0.19 in (2011) |
| October 4 | 100.9°F (1980) | 39.0°F (1931) | 0.45 in (1994) |
| October 5 | 99.0°F (1987) | 39.0°F (1931) | 0.29 in (2011) |
| October 6 | 102.9°F (2024) | 42.1°F (1931) | 0.65 in (1939) |
| October 7 | 99.0°F (2024) | 39.9°F (1931) | 0.71 in (1973) |
| October 8 | 98.1°F (1996) | 39.9°F (1968) | 0.31 in (1973) |
| October 9 | 91.9°F (1934) | 42.1°F (1968) | 0.64 in (1972) |
| October 10 | 91.9°F (1991) | 39.9°F (1968) | 1.18 in (1947) |
| October 11 | 91.0°F (1991) | 43.0°F (1985) | 1.41 in (1972) |
| October 12 | 91.9°F (2010) | 39.0°F (1969) | 0.75 in (1962) |
| October 13 | 96.1°F (2015) | 39.0°F (1981) | 4.88 in (1962) |
| October 14 | 93.9°F (1961) | 41.0°F (1960) | 0.52 in (1972) |
| October 15 | 95.0°F (1961) | 39.0°F (1931) | 0.92 in (1969) |
| October 16 | 93.9°F (2020) | 35.1°F (2006) | 1.39 in (2016) |
| October 17 | 93.0°F (2020) | 37.9°F (1938) | 0.48 in (1914) |
| October 18 | 90.0°F (1933) | 37.9°F (1946) | 0.22 in (1953) |
| October 19 | 93.9°F (2022) | 39.9°F (1932) | 2.01 in (2004) |
| October 20 | 87.1°F (1975) | 33.1°F (1949) | 0.40 in (1970) |
| October 21 | 89.1°F (1937) | 35.1°F (1949) | 0.99 in (1985) |
| October 22 | 88.0°F (1965) | 37.9°F (1949) | 1.20 in (2012) |
| October 23 | 91.0°F (1959) | 37.0°F (1961) | 1.26 in (1989) |
| October 24 | 93.0°F (2017) | 36.0°F (1956) | 4.28 in (2021) |
| October 25 | 98.1°F (2003) | 37.0°F (1935) | 1.50 in (1979) |
| October 26 | 96.1°F (2003) | 37.9°F (1939) | 1.64 in (1991) |
| October 27 | 90.0°F (2003) | 39.0°F (1931) | 0.52 in (2016) |
| October 28 | 90.0°F (2003) | 33.1°F (1946) | 1.06 in (1981) |
| October 29 | 84.9°F (1931) | 33.1°F (1946) | 1.31 in (1992) |
| October 30 | 86.0°F (1939) | 33.1°F (1971) | 1.11 in (1945) |
| October 31 | 82.9°F (1949) | 33.1°F (1935) | 1.46 in (1944) |