Portola, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -7° -30° (1971) 18.9° (1961) 4.06" 10.1"
February -6° -29.4° (1949) 22.2° (1986) 4.03" 11.8"
March -4° 11° -24.4° (1952) 26.7° (1966) 3.36" 5.6"
April -2° 14° -15.6° (1975) 29.4° (1981) 1.37" 2.7"
May 19° -10.6° (1950) 34.4° (2003) 0.96" 0.3"
June 25° -6.7° (2002) 43.9° (2006) 0.52" 0.1"
July 29° -5.6° (1976) 39.4° (2002) 0.28" 0"
August 29° -5° (1960) 41.7° (1981) 0.28" 0"
September 25° -10° (1950) 37.8° (1955) 0.6" 0"
October -1° 19° -12.8° (1971) 33.3° (1980) 1.27" 0.3"
November -4° 10° -17.8° (1975) 24.4° (1949) 2.59" 4.3"
December -7° -33.3° (1972) 21.1° (1958) 4.09" 7.8"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Mar 1 -5° -19° (1955) 21° (1986) 0.15" 0.2"
Mar 2 -5° -19° (1966) 18° (1968) 0.15" 0.3"
Mar 3 -5° -20° (1951) 17° (1950) 0.14" 0.2"
Mar 4 -5° -17° (1976) 22° (1950) 0.14" 0.2"
Mar 5 -5° -18° (1952) 21° (1972) 0.14" 0.2"
Mar 6 -4° -21° (1956) 17° (1979) 0.13" 0.3"
Mar 7 -4° 10° -17° (1956) 20° (1979) 0.13" 0.2"
Mar 8 -4° 10° -16° (1985) 21° (1972) 0.12" 0.2"
Mar 9 -4° 10° -15° (1962) 21° (1972) 0.13" 0.2"
Mar 10 -4° 10° -18° (1969) 21° (2005) 0.12" 0.2"
Mar 11 -4° 10° -13.9° (2006) 20.6° (2007) 0.13" 0.1"
Mar 12 -4° 10° -14° (1950) 22° (2005) 0.13" 0.2"
Mar 13 -4° 10° -17° (1952) 20° (2005) 0.12" 0.1"
Mar 14 -4° 10° -14° (1962) 21° (2004) 0.12" 0.2"
Mar 15 -4° 10° -14° (1958) 23° (1994) 0.11" 0.1"
Mar 16 -4° 11° -13° (1969) 23.3° (2007) 0.12" 0.2"
Mar 17 -4° 11° -12° (1966) 21.7° (2007) 0.11" 0.1"
Mar 18 -3° 11° -14° (1963) 22° (2004) 0.1" 0.2"
Mar 19 -3° 11° -11° (1987) 22° (1972) 0.1" 0.1"
Mar 20 -3° 11° -24° (1952) 22° (1960) 0.1" 0.2"
Mar 21 -3° 11° -22° (1952) 25° (2004) 0.09" 0.1"
Mar 22 -3° 11° -19° (1952) 23° (2004) 0.09" 0.2"
Mar 23 -3° 11° -18° (1952) 23° (1960) 0.09" 0.2"
Mar 24 -3° 11° -11° (1963) 23° (1960) 0.09" 0.2"
Mar 25 -3° 11° -12° (1995) 22° (1960) 0.08" 0.1"
Mar 26 -3° 12° -12° (1995) 22° (1988) 0.08" 0.2"
Mar 27 -3° 12° -11° (1995) 22° (1966) 0.08" 0.2"
Mar 28 -3° 12° -11° (1976) 24° (1966) 0.07" 0.2"
Mar 29 -3° 12° -12° (1985) 24° (1966) 0.06" 0.2"
Mar 30 -3° 12° -13° (1955) 26° (1966) 0.07" 0.1"
Mar 31 -3° 12° -11° (1999) 27° (1966) 0.07" 0.2"
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