Portola Valley, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 36° 60° 20° (1976) 75° (1984) 6.16" NA
February 39° 64° 17° (1989) 84° (1995) 5.79" NA
March 41° 67° 28° (1976) 91° (2004) 4.57" NA
April 42° 73° 30° (1976) 99° (1996) 1.64" NA
May 45° 78° 33° (1986) 105° (2001) 0.64" NA
June 48° 84° 36° (1982) 108° (1995) 0.13" NA
July 51° 88° 35° (1981) 114° (2006) 0.04" NA
August 51° 88° 38° (1987) 110° (1993) 0.14" NA
September 49° 85° 38° (1987) 108° (2000) 0.26" NA
October 45° 79° 30° (2007) 106° (1996) 1.27" NA
November 40° 66° 23° (1987) 90° (1997) 3.86" NA
December 36° 60° 22° (1985) 76° (1988) 4.21" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jul 1 50° 87° 42° (1978) 105° (1991) 0" NA
Jul 2 50° 87° 41° (1989) 107° (1991) 0" NA
Jul 3 50° 87° 38° (1981) 107° (2001) 0" NA
Jul 4 51° 87° 40° (1978) 101° (1973) 0" NA
Jul 5 51° 87° 39° (1981) 101° (1973) 0" NA
Jul 6 51° 87° 37° (1981) 106° (1989) 0" NA
Jul 7 51° 88° 35° (1981) 102° (1989) 0" NA
Jul 8 51° 88° 39° (1981) 101° (1997) 0" NA
Jul 9 51° 88° 42° (2006) 106° (2002) 0" NA
Jul 10 51° 88° 40° (1981) 102° (2002) 0" NA
Jul 11 51° 88° 44° (1974) 103° (1983) 0" NA
Jul 12 51° 88° 44° (1974) 103° (1983) 0" NA
Jul 13 51° 88° 45° (1974) 104° (1984) 0" NA
Jul 14 51° 88° 45° (1974) 101° (1982) 0" NA
Jul 15 51° 88° 35° (1981) 107° (1995) 0" NA
Jul 16 51° 88° 45° (1981) 105° (1988) 0" NA
Jul 17 51° 88° 38° (1987) 111° (1988) 0" NA
Jul 18 51° 88° 44° (1987) 103° (1988) 0" NA
Jul 19 51° 88° 40° (1987) 98° (2003) 0" NA
Jul 20 51° 89° 41° (1981) 103° (1996) 0" NA
Jul 21 51° 89° 45° (1973) 102° (1996) 0" NA
Jul 22 52° 89° 40° (1976) 114° (2006) 0" NA
Jul 23 52° 89° 42° (1973) 112° (2006) 0" NA
Jul 24 52° 89° 44° (1987) 104° (2006) 0" NA
Jul 25 52° 89° 41° (1987) 108° (1975) 0" NA
Jul 26 52° 89° 39° (1987) 104° (1973) 0" NA
Jul 27 52° 89° 40° (1987) 101° (1975) 0" NA
Jul 28 51° 89° 41° (1987) 100° (1996) 0.01" NA
Jul 29 51° 89° 43° (1987) 106° (1977) 0.01" NA
Jul 30 51° 89° 41° (1987) 108° (1977) 0.01" NA
Jul 31 51° 89° 41° (1987) 106° (1993) 0.01" NA
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