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
Jan 1 -8.3° 4.4° -27° (1952) 15° (1964) 0.12" NA
Jan 2 -8.3° 4.4° -26° (1966) 13° (1981) 0.12" NA
Jan 3 -8.3° 4.4° -28° (1950) 12° (1962) 0.12" NA
Jan 4 -8.3° 4.4° -30° (1971) 14° (1994) 0.13" NA
Jan 5 -8.3° 4.4° -26° (1971) 14° (1954) 0.13" NA
Jan 6 -8.3° 4.4° -21° (1971) 13° (2001) 0.13" NA
Jan 7 -8.3° 4.4° -20° (1955) 16° (1996) 0.13" NA
Jan 8 -8.3° 4.4° -22° (1965) 16° (1962) 0.13" NA
Jan 9 -8.3° 4.4° -24° (1957) 17° (1990) 0.13" NA
Jan 10 -8.3° 4.4° -24° (1949) 19° (1961) 0.13" NA
Jan 11 -8.3° 4.4° -23° (1949) 16° (1953) 0.13" NA
Jan 12 -7.8° 4.4° -21° (1949) 13° (1961) 0.13" NA
Jan 13 -7.8° 4.4° -23° (1960) 15° (1986) 0.13" NA
Jan 14 -7.8° 4.4° -23° (1950) 15° (1996) 0.13" NA
Jan 15 -7.8° 4.4° -28° (1950) 14° (1967) 0.14" NA
Jan 16 -7.8° 4.4° -23° (1960) 16° (1959) 0.14" NA
Jan 17 -7.8° 4.4° -21° (1955) 17° (1961) 0.14" NA
Jan 18 -7.8° 4.4° -26° (1952) 17° (1986) 0.14" NA
Jan 19 -7.8° 4.4° -21° (1952) 14° (1961) 0.14" NA
Jan 20 -7.8° -19° (1966) 14° (1994) 0.14" NA
Jan 21 -7.8° -18° (1957) 16° (1994) 0.14" NA
Jan 22 -7.8° -28° (1962) 14° (1963) 0.14" NA
Jan 23 -7.8° -23° (1957) 14° (1994) 0.14" NA
Jan 24 -7.8° -23° (1949) 16° (1953) 0.14" NA
Jan 25 -7.8° -23° (1950) 16° (1992) 0.14" NA
Jan 26 -7.8° -22° (1957) 14° (1987) 0.14" NA
Jan 27 -7.2° -25° (1957) 14° (1987) 0.14" NA
Jan 28 -7.2° 5.6° -21° (1956) 16° (1986) 0.14" NA
Jan 29 -7.2° 5.6° -23° (1956) 14° (1976) 0.14" NA
Jan 30 -7.2° 5.6° -24° (1957) 14° (1953) 0.14" NA
Jan 31 -7.2° 5.6° -26° (1972) 17° (1953) 0.14" NA
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