Portola, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 19° 42° -22° (1971) 66° (1961) 4.06" 10.1"
February 21° 45° -21° (1949) 72° (1986) 4.03" 11.8"
March 25° 51° -12° (1952) 80° (1966) 3.36" 5.6"
April 29° 57° 4° (1975) 85° (1981) 1.37" 2.7"
May 35° 67° 13° (1950) 94° (2003) 0.96" 0.3"
June 40° 76° 20° (2002) 111° (2006) 0.52" 0.1"
July 44° 85° 22° (1976) 103° (2002) 0.28" 0"
August 42° 84° 23° (1960) 107° (1981) 0.28" 0"
September 37° 77° 14° (1950) 100° (1955) 0.6" 0"
October 30° 66° 9° (1971) 92° (1980) 1.27" 0.3"
November 24° 51° 0° (1975) 76° (1949) 2.59" 4.3"
December 19° 42° -28° (1972) 70° (1958) 4.09" 7.8"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jan 1 19° 41° -16° (1952) 59° (1964) 0.13" 0.3"
Jan 2 19° 41° -14° (1966) 55° (1981) 0.13" 0.2"
Jan 3 19° 41° -18° (1950) 54° (1962) 0.13" 0.3"
Jan 4 19° 41° -22° (1971) 57° (1994) 0.14" 0.3"
Jan 5 19° 41° -14° (1971) 58° (1954) 0.13" 0.2"
Jan 6 19° 41° -5° (1971) 56° (2001) 0.13" 0.3"
Jan 7 19° 41° -4° (1955) 61° (1996) 0.13" 0.3"
Jan 8 19° 41° -8° (1965) 60° (1962) 0.13" 0.2"
Jan 9 19° 41° -11° (1957) 62° (1990) 0.14" 0.3"
Jan 10 19° 42° -12° (1949) 66° (1961) 0.14" 0.3"
Jan 11 19° 42° -9° (1949) 60° (1953) 0.15" 0.3"
Jan 12 19° 42° -5° (1949) 55° (1961) 0.14" 0.3"
Jan 13 19° 42° -9° (1960) 59° (1986) 0.15" 0.2"
Jan 14 19° 42° -10° (1950) 59° (1996) 0.14" 0.3"
Jan 15 19° 42° -19° (1950) 57° (1967) 0.14" 0.4"
Jan 16 19° 42° -9° (1960) 61° (1959) 0.13" 0.3"
Jan 17 19° 42° -5° (1955) 63° (1961) 0.12" 0.3"
Jan 18 19° 42° -15° (1952) 62° (1986) 0.12" 0.4"
Jan 19 19° 42° -5° (1952) 57° (1961) 0.12" 0.3"
Jan 20 19° 42° -3° (1966) 57° (1994) 0.13" 0.3"
Jan 21 19° 42° -1° (1957) 60° (1994) 0.12" 0.4"
Jan 22 19° 42° -18° (1962) 58° (1963) 0.12" 0.4"
Jan 23 19° 42° -10° (1957) 58° (1994) 0.12" 0.4"
Jan 24 19° 42° -10° (1949) 61° (1953) 0.12" 0.3"
Jan 25 19° 43° -10° (1950) 60° (1992) 0.13" 0.4"
Jan 26 19° 43° -7° (1957) 58° (1987) 0.13" 0.4"
Jan 27 19° 43° -13° (1957) 58° (1987) 0.13" 0.4"
Jan 28 19° 43° -5° (1956) 60° (1986) 0.13" 0.4"
Jan 29 19° 43° -9° (1956) 58° (1976) 0.13" 0.4"
Jan 30 19° 43° -11° (1957) 57° (1953) 0.13" 0.4"
Jan 31 19° 43° -14° (1972) 62° (1953) 0.13" 0.4"
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