October weather in Half Moon Bay, CA
The average temperature in Half Moon Bay in October is 57.1°F (47.9°F–66.4°F). Average precipitation: 1.26 inches.
October is a fall month in Half Moon Bay, and is warmer than the annual average of 54.9°F. Daily temperatures swing about 18.5°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 11h 0m. For travel, October is a comfortable month to visit.
Avg High
66.4°F
Avg Low
47.9°F
Precipitation
1.26 in
Daylight
11h 0m
October records in Half Moon Bay
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 82.9°F (2014) | 37.0°F (2009) | 0.27 in (1976) |
| October 2 | 88.0°F (1995) | 35.1°F (1971) | 0.31 in (2025) |
| October 3 | 89.1°F (2014) | 36.0°F (1971) | 0.28 in (1967) |
| October 4 | 93.9°F (1985) | 39.9°F (1971) | 0.24 in (2008) |
| October 5 | 90.0°F (2023) | 37.0°F (2009) | 0.88 in (2011) |
| October 6 | 87.1°F (1972) | 35.1°F (2007) | 0.75 in (1960) |
| October 7 | 89.1°F (1992) | 36.0°F (2007) | 0.97 in (1973) |
| October 8 | 90.0°F (1994) | 37.9°F (1941) | 0.74 in (1973) |
| October 9 | 89.1°F (1966) | 37.0°F (1941) | 1.46 in (1972) |
| October 10 | 86.0°F (1946) | 37.9°F (1941) | 1.40 in (1957) |
| October 11 | 86.0°F (1946) | 36.0°F (2003) | 1.92 in (1972) |
| October 12 | 87.1°F (1976) | 36.0°F (2019) | 2.87 in (1962) |
| October 13 | 88.0°F (2004) | 35.1°F (2017) | 4.90 in (1962) |
| October 14 | 88.0°F (2001) | 37.0°F (2008) | 2.24 in (1962) |
| October 15 | 90.0°F (1997) | 37.9°F (2003) | 1.38 in (1972) |
| October 16 | 91.9°F (2020) | 36.0°F (1960) | 1.91 in (1984) |
| October 17 | 84.9°F (1948) | 37.9°F (2021) | 0.12 in (2010) |
| October 18 | 82.0°F (2012) | 37.0°F (1949) | 0.39 in (1953) |
| October 19 | 82.0°F (1998) | 36.0°F (2004) | 0.82 in (2004) |
| October 20 | 91.0°F (1991) | 35.1°F (1949) | 2.14 in (2004) |
| October 21 | 87.1°F (1965) | 36.0°F (1949) | 1.31 in (1985) |
| October 22 | 91.0°F (1965) | 36.0°F (1949) | 1.07 in (2021) |
| October 23 | 88.0°F (1965) | 37.0°F (1949) | 0.99 in (2012) |
| October 24 | 91.9°F (2017) | 35.1°F (1956) | 1.28 in (2012) |
| October 25 | 91.9°F (2017) | 34.0°F (2000) | 2.20 in (1979) |
| October 26 | 93.9°F (2003) | 36.0°F (1949) | 1.77 in (2000) |
| October 27 | 93.9°F (2003) | 37.0°F (2022) | 0.85 in (1987) |
| October 28 | 84.9°F (2006) | 37.0°F (1946) | 2.35 in (1981) |
| October 29 | 84.0°F (1939) | 33.1°F (1946) | 1.56 in (1992) |
| October 30 | 86.0°F (1939) | 36.0°F (2009) | 1.28 in (1945) |
| October 31 | 84.9°F (1966) | 39.0°F (1943) | 1.74 in (1944) |