Portola, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -7° -30° (1971) 18.9° (1961) 4.06" 10.1"
February -6° -29.4° (1949) 22.2° (1986) 4.03" 11.8"
March -4° 11° -24.4° (1952) 26.7° (1966) 3.36" 5.6"
April -2° 14° -15.6° (1975) 29.4° (1981) 1.37" 2.7"
May 19° -10.6° (1950) 34.4° (2003) 0.96" 0.3"
June 25° -6.7° (2002) 43.9° (2006) 0.52" 0.1"
July 29° -5.6° (1976) 39.4° (2002) 0.28" 0"
August 29° -5° (1960) 41.7° (1981) 0.28" 0"
September 25° -10° (1950) 37.8° (1955) 0.6" 0"
October -1° 19° -12.8° (1971) 33.3° (1980) 1.27" 0.3"
November -4° 10° -17.8° (1975) 24.4° (1949) 2.59" 4.3"
December -7° -33.3° (1972) 21.1° (1958) 4.09" 7.8"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jul 1 27° -6° (1976) 34° (1967) 0.01" 0"
Jul 2 28° -5° (1976) 37° (1984) 0.01" 0"
Jul 3 28° -4° (1976) 37° (1984) 0.01" 0"
Jul 4 28° -2° (1949) 39° (1984) 0.01" 0"
Jul 5 28° -3° (1955) 37.8° (2007) 0.01" 0"
Jul 6 28° -4° (1961) 38.3° (2007) 0.01" 0"
Jul 7 29° -3° (1961) 35° (2007) 0.01" 0"
Jul 8 29° -3° (1983) 35° (1952) 0.01" 0"
Jul 9 29° -1° (1983) 37° (1961) 0.01" 0"
Jul 10 29° -2° (1965) 37° (2002) 0" 0"
Jul 11 29° -2° (1974) 38° (2002) 0.01" 0"
Jul 12 29° -1° (1966) 39° (2002) 0.01" 0"
Jul 13 29° -1° (1966) 36° (1984) 0.02" 0"
Jul 14 30° -1° (1966) 38° (1972) 0.01" 0"
Jul 15 30° -2° (1966) 38° (1972) 0" 0"
Jul 16 30° -1° (1966) 38° (1984) 0.01" 0"
Jul 17 30° 0° (1983) 38° (1960) 0.01" 0"
Jul 18 30° -2° (1987) 39° (1960) 0.01" 0"
Jul 19 30° -2° (1987) 37° (1960) 0.01" 0"
Jul 20 30° -2° (1949) 36° (1988) 0.01" 0"
Jul 21 30° -2° (1987) 36° (1980) 0.01" 0"
Jul 22 30° 0° (1976) 37° (1959) 0.01" 0"
Jul 23 30° 0° (1983) 38° (2003) 0.01" 0"
Jul 24 30° -1° (1949) 36° (1964) 0.01" 0"
Jul 25 30° -1° (1953) 37° (1978) 0.01" 0"
Jul 26 30° 1° (1955) 37° (1975) 0.01" 0"
Jul 27 30° 1° (1953) 38° (1980) 0" 0"
Jul 28 30° 1° (1961) 36° (1968) 0.01" 0"
Jul 29 30° -1° (1961) 37° (1966) 0.01" 0"
Jul 30 30° -4° (1961) 37° (2003) 0" 0"
Jul 31 30° -4° (1961) 38° (1977) 0.01" 0"
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