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
Aug 1 42° 86° 30° (1960) 98° (1977) 0.01" NA
Aug 2 42° 86° 30° (1959) 98° (1993) 0.01" NA
Aug 3 42° 85° 29° (1956) 101° (1961) 0.01" NA
Aug 4 41° 85° 29° (1953) 99° (1978) 0.01" NA
Aug 5 41° 85° 29° (1956) 97° (1978) 0.01" NA
Aug 6 41° 85° 30° (1950) 101° (1981) 0.01" NA
Aug 7 41° 85° 25° (1976) 105° (1981) 0.01" NA
Aug 8 41° 85° 31° (1957) 107° (1981) 0.01" NA
Aug 9 41° 85° 28° (1950) 103° (1981) 0.01" NA
Aug 10 41° 85° 31° (1948) 99° (1981) 0.01" NA
Aug 11 41° 85° 28° (1957) 98° (1981) 0.01" NA
Aug 12 41° 84° 27° (1957) 97° (1981) 0.01" NA
Aug 13 41° 84° 30° (1952) 97° (1998) 0.01" NA
Aug 14 41° 84° 30° (1974) 98° (2002) 0.01" NA
Aug 15 40° 84° 27° (1954) 100° (1966) 0.01" NA
Aug 16 40° 84° 29° (1957) 97° (1977) 0.01" NA
Aug 17 40° 84° 29° (1957) 94° (1966) 0.01" NA
Aug 18 40° 84° 27° (1976) 94° (1951) 0.01" NA
Aug 19 40° 83° 29° (1957) 95° (2003) 0.01" NA
Aug 20 40° 83° 30° (1957) 97° (1988) 0.02" NA
Aug 21 40° 83° 28° (1959) 94° (1969) 0.02" NA
Aug 22 40° 83° 27° (1968) 96° (1982) 0.02" NA
Aug 23 39° 83° 24° (1960) 94° (1967) 0.02" NA
Aug 24 39° 82° 28° (1948) 94° (1982) 0.02" NA
Aug 25 39° 82° 26° (1960) 93° (1988) 0.02" NA
Aug 26 39° 82° 26° (1961) 93° (1988) 0.02" NA
Aug 27 39° 82° 26° (1952) 97° (1981) 0.02" NA
Aug 28 39° 81° 26° (1959) 94° (2001) 0.02" NA
Aug 29 39° 81° 23° (1960) 95° (1988) 0.02" NA
Aug 30 38° 81° 25° (1957) 93° (1955) 0.02" NA
Aug 31 38° 81° 28° (1966) 95° (1976) 0.02" NA
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