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
Mar 1 -5° 8.3° -19° (1955) 21° (1986) 0.14" NA
Mar 2 -4.4° 8.3° -19° (1966) 18° (1968) 0.14" NA
Mar 3 -4.4° 8.3° -20° (1951) 17° (1950) 0.14" NA
Mar 4 -4.4° 8.3° -17° (1976) 22° (1950) 0.14" NA
Mar 5 -4.4° 8.3° -18° (1952) 21° (1972) 0.14" NA
Mar 6 -4.4° 8.9° -21° (1956) 17° (1979) 0.13" NA
Mar 7 -4.4° 8.9° -17° (1956) 20° (1979) 0.13" NA
Mar 8 -3.9° 8.9° -16° (1985) 21° (1972) 0.13" NA
Mar 9 -3.9° 8.9° -15° (1962) 21° (1972) 0.13" NA
Mar 10 -3.9° 8.9° -18° (1969) 21° (2005) 0.13" NA
Mar 11 -3.9° 8.9° -13.9° (2006) 20.6° (2007) 0.13" NA
Mar 12 -3.9° 9.4° -14° (1950) 22° (2005) 0.13" NA
Mar 13 -3.9° 9.4° -17° (1952) 20° (2005) 0.13" NA
Mar 14 -3.3° 9.4° -14° (1962) 21° (2004) 0.13" NA
Mar 15 -3.3° 9.4° -14° (1958) 23° (1994) 0.12" NA
Mar 16 -3.3° 9.4° -13° (1969) 23.3° (2007) 0.12" NA
Mar 17 -3.3° 10° -12° (1966) 21.7° (2007) 0.12" NA
Mar 18 -3.3° 10° -14° (1963) 22° (2004) 0.12" NA
Mar 19 -3.3° 10° -11° (1987) 22° (1972) 0.11" NA
Mar 20 -3.3° 10° -24° (1952) 22° (1960) 0.11" NA
Mar 21 -3.3° 10° -22° (1952) 25° (2004) 0.11" NA
Mar 22 -3.3° 10.6° -19° (1952) 23° (2004) 0.11" NA
Mar 23 -2.8° 10.6° -18° (1952) 23° (1960) 0.1" NA
Mar 24 -2.8° 10.6° -11° (1963) 23° (1960) 0.1" NA
Mar 25 -2.8° 10.6° -12° (1995) 22° (1960) 0.1" NA
Mar 26 -2.8° 10.6° -12° (1995) 22° (1988) 0.1" NA
Mar 27 -2.8° 11.1° -11° (1995) 22° (1966) 0.09" NA
Mar 28 -2.8° 11.1° -11° (1976) 24° (1966) 0.09" NA
Mar 29 -2.8° 11.1° -12° (1985) 24° (1966) 0.08" NA
Mar 30 -2.8° 11.1° -13° (1955) 26° (1966) 0.08" NA
Mar 31 -2.8° 11.7° -11° (1999) 27° (1966) 0.08" NA
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