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
Jul 1 27.2° -6° (1976) 34° (1967) 0.02" NA
Jul 2 27.2° -5° (1976) 37° (1984) 0.02" NA
Jul 3 27.8° -4° (1976) 37° (1984) 0.02" NA
Jul 4 27.8° -2° (1949) 39° (1984) 0.01" NA
Jul 5 27.8° -3° (1955) 37.8° (2007) 0.01" NA
Jul 6 28.3° -4° (1961) 38.3° (2007) 0.01" NA
Jul 7 5.6° 28.3° -3° (1961) 35° (2007) 0.01" NA
Jul 8 5.6° 28.3° -3° (1983) 35° (1952) 0.01" NA
Jul 9 5.6° 28.3° -1° (1983) 37° (1961) 0.01" NA
Jul 10 5.6° 28.9° -2° (1965) 37° (2002) 0.01" NA
Jul 11 5.6° 28.9° -2° (1974) 38° (2002) 0.01" NA
Jul 12 5.6° 28.9° -1° (1966) 39° (2002) 0.01" NA
Jul 13 5.6° 28.9° -1° (1966) 36° (1984) 0.01" NA
Jul 14 5.6° 29.4° -1° (1966) 38° (1972) 0.01" NA
Jul 15 5.6° 29.4° -2° (1966) 38° (1972) 0.01" NA
Jul 16 5.6° 29.4° -1° (1966) 38° (1984) 0.01" NA
Jul 17 5.6° 29.4° 0° (1983) 38° (1960) 0.01" NA
Jul 18 5.6° 29.4° -2° (1987) 39° (1960) 0.01" NA
Jul 19 5.6° 29.4° -2° (1987) 37° (1960) 0.01" NA
Jul 20 5.6° 29.4° -2° (1949) 36° (1988) 0.01" NA
Jul 21 5.6° 29.4° -2° (1987) 36° (1980) 0.01" NA
Jul 22 5.6° 30° 0° (1976) 37° (1959) 0.01" NA
Jul 23 5.6° 30° 0° (1983) 38° (2003) 0.01" NA
Jul 24 5.6° 30° -1° (1949) 36° (1964) 0.01" NA
Jul 25 5.6° 30° -1° (1953) 37° (1978) 0.01" NA
Jul 26 5.6° 30° 1° (1955) 37° (1975) 0.01" NA
Jul 27 5.6° 30° 1° (1953) 38° (1980) 0.01" NA
Jul 28 5.6° 30° 1° (1961) 36° (1968) 0.01" NA
Jul 29 5.6° 30° -1° (1961) 37° (1966) 0.01" NA
Jul 30 5.6° 30° -4° (1961) 37° (2003) 0.01" NA
Jul 31 5.6° 30° -4° (1961) 38° (1977) 0.01" NA
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