August weather in Portola, CA
The average temperature in Portola in August is 63.9°F (42.6°F–85.2°F). Average precipitation: 0.30 inches.
August is a summer month in Portola, and is warmer than the annual average of 46.7°F. Daily temperatures swing about 42.6°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 13h 34m. For travel, August is a comfortable month to visit.
Avg High
85.2°F
Avg Low
42.6°F
Precipitation
0.30 in
Daylight
13h 34m
August records in Portola
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 98.1°F (1977) | 25.0°F (1919) | 0.17 in (2003) |
| August 2 | 99.0°F (1939) | 25.0°F (1919) | 0.55 in (2015) |
| August 3 | 100.9°F (1961) | 27.0°F (1919) | 0.32 in (2017) |
| August 4 | 99.0°F (1978) | 27.0°F (1919) | 0.13 in (2017) |
| August 5 | 97.0°F (1978) | 27.0°F (1923) | 0.81 in (2014) |
| August 6 | 100.9°F (1981) | 28.0°F (1918) | 0.18 in (2022) |
| August 7 | 105.1°F (1981) | 25.0°F (1976) | 0.23 in (2009) |
| August 8 | 107.1°F (1981) | 28.0°F (1924) | 0.62 in (1989) |
| August 9 | 102.9°F (1981) | 25.0°F (1919) | 0.19 in (1962) |
| August 10 | 99.0°F (1981) | 28.0°F (1919) | 0.39 in (1999) |
| August 11 | 98.1°F (1937) | 26.1°F (1918) | 0.31 in (1965) |
| August 12 | 100.0°F (1935) | 25.0°F (1919) | 0.42 in (1965) |
| August 13 | 97.0°F (1998) | 26.1°F (1918) | 0.27 in (1991) |
| August 14 | 98.1°F (1918) | 26.1°F (1921) | 0.75 in (1965) |
| August 15 | 100.0°F (1966) | 24.1°F (1921) | 1.80 in (1992) |
| August 16 | 100.0°F (2021) | 26.1°F (1921) | 0.37 in (1991) |
| August 17 | 98.1°F (1939) | 23.0°F (1921) | 0.25 in (1965) |
| August 18 | 99.0°F (1939) | 25.0°F (1932) | 0.52 in (1975) |
| August 19 | 99.0°F (1939) | 19.0°F (1943) | 0.64 in (1975) |
| August 20 | 98.1°F (1919) | 21.9°F (1943) | 2.02 in (1990) |
| August 21 | 96.1°F (1915) | 19.0°F (1943) | 0.37 in (1975) |
| August 22 | 97.0°F (1915) | 25.0°F (1932) | 0.60 in (2013) |
| August 23 | 95.0°F (1942) | 19.9°F (1921) | 0.27 in (2003) |
| August 24 | 95.0°F (2025) | 24.1°F (1936) | 0.26 in (2024) |
| August 25 | 93.9°F (1935) | 24.1°F (1927) | 0.12 in (2025) |
| August 26 | 97.0°F (1944) | 21.9°F (1943) | 0.16 in (1971) |
| August 27 | 97.0°F (1981) | 25.0°F (1942) | 0.24 in (2025) |
| August 28 | 96.1°F (2019) | 26.1°F (1927) | 0.55 in (1970) |
| August 29 | 98.1°F (1915) | 23.0°F (1960) | 0.20 in (1932) |
| August 30 | 93.9°F (1915) | 21.9°F (1927) | 0.31 in (1953) |
| August 31 | 96.1°F (1915) | 24.1°F (1927) | 0.07 in (1983) |