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
Jun 1 36° 71° 23° (1976) 90° (2001) 0.03" NA
Jun 2 37° 71° 23° (1976) 88° (1960) 0.03" NA
Jun 3 37° 71° 24° (1976) 92° (1969) 0.03" NA
Jun 4 37° 72° 26° (1962) 92° (1970) 0.03" NA
Jun 5 37° 72° 20° (1976) 95° (1977) 0.03" NA
Jun 6 37° 72° 26° (1976) 91° (1977) 0.02" NA
Jun 7 37° 73° 26° (1951) 91° (1955) 0.02" NA
Jun 8 38° 73° 21° (1950) 95° (1955) 0.02" NA
Jun 9 38° 73° 20° (2002) 96° (1955) 0.02" NA
Jun 10 38° 74° 27° (2004) 90° (1955) 0.02" NA
Jun 11 38° 74° 25° (1972) 89° (1991) 0.02" NA
Jun 12 38° 74° 22° (1952) 86° (1974) 0.02" NA
Jun 13 38° 75° 21° (1952) 90° (1966) 0.02" NA
Jun 14 39° 75° 26° (1992) 95° (1961) 0.02" NA
Jun 15 39° 75° 26° (1952) 94° (2000) 0.02" NA
Jun 16 39° 76° 28° (1952) 90° (1982) 0.02" NA
Jun 17 39° 76° 28° (1994) 92° (1985) 0.02" NA
Jun 18 39° 76° 27° (1975) 93° (1985) 0.02" NA
Jun 19 39° 77° 28° (1994) 92° (1959) 0.02" NA
Jun 20 39° 77° 30° (1974) 99° (1961) 0.01" NA
Jun 21 40° 77° 29° (1991) 96° (1961) 0.01" NA
Jun 22 40° 78° 28° (1966) 96° (1961) 0.01" NA
Jun 23 40° 78° 25° (1976) 101° (2006) 0.01" NA
Jun 24 40° 79° 28° (2003) 111° (2006) 0.01" NA
Jun 25 40° 79° 28° (1950) 97° (1977) 0.01" NA
Jun 26 40° 79° 26° (1974) 96° (2006) 0.01" NA
Jun 27 40° 80° 28° (1976) 96° (1956) 0.01" NA
Jun 28 40° 80° 30° (1960) 94° (1977) 0.01" NA
Jun 29 41° 80° 26° (1963) 98° (1950) 0.01" NA
Jun 30 41° 81° 27° (1953) 99° (1950) 0.01" NA
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