Portola, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -8° -30° (1971) 18.9° (1961) 4.17" 16.1"
February -6° -29.4° (1949) 22.2° (1986) 3.87" 12.8"
March -3° -24.4° (1952) 26.7° (1966) 3.61" 10.2"
April -2° 14° -15.6° (1975) 29.4° (1981) 1.23" 4"
May 19° -10.6° (1950) 34.4° (2003) 1.12" 1.1"
June 24° -6.7° (2002) 43.9° (2006) 0.54" 0"
July 29° -5.6° (1976) 39.4° (2002) 0.34" 0"
August 29° -5° (1960) 41.7° (1981) 0.43" 0"
September 24° -10° (1950) 37.8° (1955) 0.78" 0.1"
October -2° 18° -12.8° (1971) 33.3° (1980) 1.22" 0.2"
November -5° 10° -17.8° (1975) 24.4° (1949) 2.5" 5.6"
December -8° -33.3° (1972) 21.1° (1958) 3.28" 18.7"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Oct 1 22.2° -10° (1950) 33° (1980) 0.03" NA
Oct 2 21.7° -9° (1950) 32° (1980) 0.03" NA
Oct 3 -0.6° 21.7° -6° (1954) 32° (1980) 0.03" NA
Oct 4 -0.6° 21.7° -6° (1969) 32° (1980) 0.03" NA
Oct 5 -0.6° 21.1° -8° (1969) 31° (1980) 0.03" NA
Oct 6 -0.6° 21.1° -8° (1969) 31° (1980) 0.03" NA
Oct 7 -1.1° 21.1° -8° (1962) 31° (1980) 0.03" NA
Oct 8 -1.1° 20.6° -8° (1968) 31° (1980) 0.03" NA
Oct 9 -1.1° 20.6° -8° (1985) 32° (1996) 0.03" NA
Oct 10 -1.1° 20° -6° (1948) 31° (1996) 0.03" NA
Oct 11 -1.1° 20° -4° (1955) 28° (1965) 0.03" NA
Oct 12 -1.7° 19.4° -8° (1969) 28° (1991) 0.03" NA
Oct 13 -1.7° 19.4° -7° (1985) 29° (1952) 0.03" NA
Oct 14 -1.7° 19.4° -9° (1960) 29° (1959) 0.03" NA
Oct 15 -1.7° 18.9° -9° (1966) 28° (1954) 0.04" NA
Oct 16 -2.2° 18.9° -7° (1967) 28° (1991) 0.04" NA
Oct 17 -2.2° 18.3° -8° (1966) 28° (1959) 0.04" NA
Oct 18 -2.2° 18.3° -8° (1982) 28° (1988) 0.04" NA
Oct 19 -2.2° 17.8° -7° (1966) 27° (1977) 0.04" NA
Oct 20 -2.2° 17.8° -9° (1949) 27° (1964) 0.04" NA
Oct 21 -2.8° 17.2° -10° (1949) 27° (1964) 0.04" NA
Oct 22 -2.8° 17.2° -11° (1961) 28° (2003) 0.04" NA
Oct 23 -2.8° 16.7° -8° (1961) 28° (1959) 0.05" NA
Oct 24 -2.8° 16.7° -11° (1956) 29° (1959) 0.05" NA
Oct 25 -2.8° 16.1° -11° (1954) 28° (1959) 0.05" NA
Oct 26 -3.3° 15.6° -8° (2004) 24° (1952) 0.05" NA
Oct 27 -3.3° 15.6° -11° (1948) 28° (1978) 0.05" NA
Oct 28 -3.3° 15° -12° (1948) 26° (1968) 0.05" NA
Oct 29 -3.3° 15° -13° (1971) 27° (2003) 0.06" NA
Oct 30 -3.3° 14.4° -13° (1948) 26° (1966) 0.06" NA
Oct 31 -3.9° 13.9° -10° (2002) 25° (1949) 0.06" NA
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