Portola, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 18° 41° -22° (1971) 66° (1961) 4.17" 16.1"
February 21° 45° -21° (1949) 72° (1986) 3.87" 12.8"
March 26° 49° -12° (1952) 80° (1966) 3.61" 10.2"
April 29° 57° 4° (1975) 85° (1981) 1.23" 4"
May 34° 66° 13° (1950) 94° (2003) 1.12" 1.1"
June 39° 76° 20° (2002) 111° (2006) 0.54" 0"
July 42° 84° 22° (1976) 103° (2002) 0.34" 0"
August 40° 84° 23° (1960) 107° (1981) 0.43" 0"
September 35° 76° 14° (1950) 100° (1955) 0.78" 0.1"
October 29° 65° 9° (1971) 92° (1980) 1.22" 0.2"
November 23° 50° 0° (1975) 76° (1949) 2.5" 5.6"
December 18° 42° -28° (1972) 70° (1958) 3.28" 18.7"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jul 1 41° 81° 22° (1976) 94° (1967) 0.02" NA
Jul 2 41° 81° 23° (1976) 98° (1984) 0.02" NA
Jul 3 41° 82° 24° (1976) 98° (1984) 0.02" NA
Jul 4 41° 82° 29° (1949) 103° (1984) 0.01" NA
Jul 5 41° 82° 27° (1955) 100° (2007) 0.01" NA
Jul 6 41° 83° 24° (1961) 101° (2007) 0.01" NA
Jul 7 42° 83° 26° (1961) 95° (2007) 0.01" NA
Jul 8 42° 83° 27° (1983) 95° (1952) 0.01" NA
Jul 9 42° 83° 30° (1983) 98° (1961) 0.01" NA
Jul 10 42° 84° 28° (1965) 99° (2002) 0.01" NA
Jul 11 42° 84° 28° (1974) 101° (2002) 0.01" NA
Jul 12 42° 84° 30° (1966) 103° (2002) 0.01" NA
Jul 13 42° 84° 30° (1966) 97° (1984) 0.01" NA
Jul 14 42° 85° 31° (1966) 100° (1972) 0.01" NA
Jul 15 42° 85° 28° (1966) 101° (1972) 0.01" NA
Jul 16 42° 85° 30° (1966) 100° (1984) 0.01" NA
Jul 17 42° 85° 32° (1983) 100° (1960) 0.01" NA
Jul 18 42° 85° 29° (1987) 102° (1960) 0.01" NA
Jul 19 42° 85° 29° (1987) 98° (1960) 0.01" NA
Jul 20 42° 85° 29° (1949) 97° (1988) 0.01" NA
Jul 21 42° 85° 29° (1987) 97° (1980) 0.01" NA
Jul 22 42° 86° 32° (1976) 99° (1959) 0.01" NA
Jul 23 42° 86° 32° (1983) 100° (2003) 0.01" NA
Jul 24 42° 86° 31° (1949) 97° (1964) 0.01" NA
Jul 25 42° 86° 30° (1953) 98° (1978) 0.01" NA
Jul 26 42° 86° 33° (1955) 98° (1975) 0.01" NA
Jul 27 42° 86° 34° (1953) 100° (1980) 0.01" NA
Jul 28 42° 86° 33° (1961) 96° (1968) 0.01" NA
Jul 29 42° 86° 31° (1961) 98° (1966) 0.01" NA
Jul 30 42° 86° 24° (1961) 99° (2003) 0.01" NA
Jul 31 42° 86° 25° (1961) 100° (1977) 0.01" NA
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