October weather in St. Helena, CA
The average temperature in St. Helena in October is 63.7°F (49.4°F–78.1°F). Average precipitation: 1.65 inches.
October is a fall month in St. Helena, and is warmer than the annual average of 61°F. Daily temperatures swing about 28.7°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 10h 58m. For travel, October is a comfortable month to visit.
Avg High
78.1°F
Avg Low
49.4°F
Precipitation
1.65 in
Daylight
10h 58m
October records in St. Helena
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 102.9°F (1952) | 32.0°F (1950) | 0.48 in (1926) |
| October 2 | 100.9°F (1952) | 21.9°F (2019) | 0.78 in (2018) |
| October 3 | 104.0°F (1917) | 35.1°F (1939) | 0.81 in (1922) |
| October 4 | 102.9°F (1933) | 35.1°F (1908) | 0.42 in (2008) |
| October 5 | 104.0°F (1933) | 35.1°F (1929) | 1.24 in (2011) |
| October 6 | 100.9°F (1930) | 25.0°F (1920) | 1.01 in (1920) |
| October 7 | 100.9°F (1965) | 32.0°F (1941) | 0.56 in (1947) |
| October 8 | 102.9°F (1996) | 35.1°F (1941) | 0.71 in (1926) |
| October 9 | 102.0°F (1996) | 35.1°F (1941) | 1.30 in (1997) |
| October 10 | 102.9°F (1991) | 34.0°F (1930) | 1.70 in (1957) |
| October 11 | 96.1°F (1939) | 30.0°F (1924) | 1.56 in (1962) |
| October 12 | 98.1°F (1978) | 21.9°F (2013) | 5.58 in (1962) |
| October 13 | 98.1°F (1978) | 21.9°F (2019) | 3.60 in (2009) |
| October 14 | 100.9°F (1961) | 21.9°F (2019) | 0.93 in (1993) |
| October 15 | 100.0°F (1961) | 21.9°F (2019) | 2.48 in (1969) |
| October 16 | 98.1°F (1961) | 21.9°F (2019) | 1.72 in (1947) |
| October 17 | 99.0°F (1933) | 28.0°F (2020) | 0.20 in (1950) |
| October 18 | 98.1°F (2020) | 32.0°F (1971) | 1.63 in (1920) |
| October 19 | 98.1°F (1921) | 34.0°F (1946) | 0.67 in (1909) |
| October 20 | 95.0°F (2022) | 27.0°F (1949) | 0.85 in (1985) |
| October 21 | 98.1°F (1929) | 30.0°F (1949) | 1.03 in (1989) |
| October 22 | 96.1°F (1929) | 30.0°F (1949) | 1.80 in (1989) |
| October 23 | 96.1°F (1929) | 32.0°F (1949) | 2.00 in (1957) |
| October 24 | 99.0°F (2017) | 30.0°F (1919) | 9.93 in (2021) |
| October 25 | 95.0°F (1917) | 28.9°F (1939) | 2.05 in (1982) |
| October 26 | 95.0°F (2017) | 28.0°F (1919) | 2.01 in (1991) |
| October 27 | 93.9°F (2003) | 30.9°F (1919) | 2.38 in (1981) |
| October 28 | 93.0°F (1915) | 26.1°F (1946) | 1.67 in (1992) |
| October 29 | 91.0°F (1939) | 23.0°F (1946) | 1.67 in (1945) |
| October 30 | 93.0°F (1939) | 27.0°F (1946) | 2.59 in (1956) |
| October 31 | 93.9°F (1966) | 26.1°F (1935) | 1.19 in (1934) |