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
Jun 1 47° 81° 41° (1974) 100° (1989) 0.01" NA
Jun 2 47° 81° 36° (1982) 102° (1996) 0.01" NA
Jun 3 47° 82° 36° (1976) 103° (1996) 0.01" NA
Jun 4 47° 82° 37° (1980) 101° (1981) 0.01" NA
Jun 5 47° 82° 37° (1982) 102° (1996) 0.01" NA
Jun 6 47° 82° 39° (1976) 100° (1978) 0.01" NA
Jun 7 47° 83° 40° (1980) 101° (1973) 0.01" NA
Jun 8 48° 83° 39° (1982) 104° (1973) 0.01" NA
Jun 9 48° 83° 40° (1999) 102° (1994) 0.01" NA
Jun 10 48° 83° 41° (1976) 104° (1994) 0.01" NA
Jun 11 48° 83° 41° (1999) 102° (1994) 0.01" NA
Jun 12 48° 84° 41° (1982) 99° (1985) 0.01" NA
Jun 13 48° 84° 40° (1991) 100° (2007) 0.01" NA
Jun 14 48° 84° 40° (1988) 103° (2007) 0" NA
Jun 15 48° 84° 41° (1973) 102° (2004) 0" NA
Jun 16 48° 84° 41° (2002) 102° (2004) 0" NA
Jun 17 49° 85° 41° (1987) 99° (1993) 0" NA
Jun 18 49° 85° 42° (1973) 103° (1993) 0" NA
Jun 19 49° 85° 42° (1987) 102° (1981) 0" NA
Jun 20 49° 85° 41° (1984) 105° (1973) 0" NA
Jun 21 49° 85° 40° (1991) 106° (1981) 0" NA
Jun 22 49° 86° 40° (1991) 105° (2006) 0" NA
Jun 23 49° 86° 40° (1991) 103° (1995) 0" NA
Jun 24 49° 86° 43° (1983) 107° (1995) 0" NA
Jun 25 49° 86° 38° (1989) 108° (1995) 0" NA
Jun 26 50° 86° 40° (1974) 105° (2003) 0" NA
Jun 27 50° 86° 41° (1975) 105° (1976) 0" NA
Jun 28 50° 86° 42° (1974) 102° (2003) 0" NA
Jun 29 50° 87° 41° (1981) 105° (1999) 0" NA
Jun 30 50° 87° 41° (1985) 105° (1996) 0" NA
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