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
Apr 1 27° 53° 14° (1999) 79° (1966) 0.07" NA
Apr 2 27° 53° 11° (1963) 80° (1961) 0.07" NA
Apr 3 27° 53° 15° (1955) 74° (1961) 0.07" NA
Apr 4 27° 53° 16° (1999) 75° (1977) 0.06" NA
Apr 5 27° 54° 17° (1999) 75° (1977) 0.06" NA
Apr 6 28° 54° 8° (1982) 78° (1989) 0.06" NA
Apr 7 28° 54° 4° (1975) 78° (1989) 0.05" NA
Apr 8 28° 54° 13° (2001) 76° (1989) 0.05" NA
Apr 9 28° 55° 12° (1999) 78° (1951) 0.05" NA
Apr 10 28° 55° 13° (1999) 78° (1951) 0.04" NA
Apr 11 28° 55° 15° (1972) 76° (1988) 0.04" NA
Apr 12 28° 55° 14° (2007) 76° (1951) 0.04" NA
Apr 13 28° 56° 9° (1972) 79° (1951) 0.04" NA
Apr 14 28° 56° 15° (1961) 78° (1985) 0.04" NA
Apr 15 28° 56° 12° (1975) 78° (1985) 0.04" NA
Apr 16 29° 57° 12° (1963) 79° (1954) 0.03" NA
Apr 17 29° 57° 15° (1963) 78° (1954) 0.03" NA
Apr 18 29° 57° 18° (1955) 77° (1954) 0.03" NA
Apr 19 29° 57° 18° (1966) 77° (1950) 0.03" NA
Apr 20 29° 58° 12° (1961) 78° (1950) 0.03" NA
Apr 21 29° 58° 15° (1963) 84° (1954) 0.03" NA
Apr 22 29° 58° 12° (1963) 77° (1953) 0.03" NA
Apr 23 29° 59° 17° (1963) 77° (1977) 0.03" NA
Apr 24 30° 59° 10° (1961) 76° (1949) 0.03" NA
Apr 25 30° 59° 15° (1974) 76° (1977) 0.03" NA
Apr 26 30° 59° 15° (1975) 79° (1987) 0.03" NA
Apr 27 30° 60° 12° (1955) 80° (2004) 0.03" NA
Apr 28 30° 60° 13° (1967) 78° (1981) 0.03" NA
Apr 29 30° 60° 16° (1967) 80° (1981) 0.03" NA
Apr 30 31° 61° 20° (1949) 85° (1981) 0.03" NA
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