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
Apr 1 -2.8° 11.7° -10° (1999) 26° (1966) 0.07" NA
Apr 2 -2.8° 11.7° -12° (1963) 27° (1961) 0.07" NA
Apr 3 -2.8° 11.7° -9° (1955) 23° (1961) 0.07" NA
Apr 4 -2.8° 11.7° -9° (1999) 24° (1977) 0.06" NA
Apr 5 -2.8° 12.2° -8° (1999) 24° (1977) 0.06" NA
Apr 6 -2.2° 12.2° -13° (1982) 26° (1989) 0.06" NA
Apr 7 -2.2° 12.2° -16° (1975) 26° (1989) 0.05" NA
Apr 8 -2.2° 12.2° -11° (2001) 24° (1989) 0.05" NA
Apr 9 -2.2° 12.8° -11° (1999) 26° (1951) 0.05" NA
Apr 10 -2.2° 12.8° -11° (1999) 26° (1951) 0.04" NA
Apr 11 -2.2° 12.8° -9° (1972) 24° (1988) 0.04" NA
Apr 12 -2.2° 12.8° -10° (2007) 24° (1951) 0.04" NA
Apr 13 -2.2° 13.3° -13° (1972) 26° (1951) 0.04" NA
Apr 14 -2.2° 13.3° -9° (1961) 26° (1985) 0.04" NA
Apr 15 -2.2° 13.3° -11° (1975) 26° (1985) 0.04" NA
Apr 16 -1.7° 13.9° -11° (1963) 26° (1954) 0.03" NA
Apr 17 -1.7° 13.9° -9° (1963) 26° (1954) 0.03" NA
Apr 18 -1.7° 13.9° -8° (1955) 25° (1954) 0.03" NA
Apr 19 -1.7° 13.9° -8° (1966) 25° (1950) 0.03" NA
Apr 20 -1.7° 14.4° -11° (1961) 26° (1950) 0.03" NA
Apr 21 -1.7° 14.4° -9° (1963) 29° (1954) 0.03" NA
Apr 22 -1.7° 14.4° -11° (1963) 25° (1953) 0.03" NA
Apr 23 -1.7° 15° -8° (1963) 25° (1977) 0.03" NA
Apr 24 -1.1° 15° -12° (1961) 24° (1949) 0.03" NA
Apr 25 -1.1° 15° -9° (1974) 24° (1977) 0.03" NA
Apr 26 -1.1° 15° -9° (1975) 26° (1987) 0.03" NA
Apr 27 -1.1° 15.6° -11° (1955) 27° (2004) 0.03" NA
Apr 28 -1.1° 15.6° -11° (1967) 26° (1981) 0.03" NA
Apr 29 -1.1° 15.6° -9° (1967) 27° (1981) 0.03" NA
Apr 30 -0.6° 16.1° -7° (1949) 29° (1981) 0.03" NA
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