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
Jan 1 35° 59° 26° (1979) 71° (1996) 0.16" NA
Jan 2 35° 59° 20° (1976) 74° (1996) 0.17" NA
Jan 3 35° 59° 25° (1976) 69° (1984) 0.17" NA
Jan 4 36° 59° 24° (1993) 70° (2001) 0.17" NA
Jan 5 36° 59° 27° (1993) 70° (2001) 0.18" NA
Jan 6 36° 59° 29° (1989) 72° (2003) 0.18" NA
Jan 7 36° 59° 24° (1982) 69° (2003) 0.18" NA
Jan 8 36° 59° 27° (1982) 70° (2004) 0.19" NA
Jan 9 36° 59° 28° (1974) 69° (1990) 0.19" NA
Jan 10 36° 59° 28° (1982) 70° (1996) 0.19" NA
Jan 11 36° 59° 28° (1987) 70° (1983) 0.19" NA
Jan 12 36° 59° 25° (2007) 69° (1996) 0.2" NA
Jan 13 36° 59° 21° (2007) 69° (2006) 0.2" NA
Jan 14 36° 59° 22° (1984) 70° (1975) 0.2" NA
Jan 15 36° 59° 24° (1988) 72° (1976) 0.2" NA
Jan 16 36° 60° 25° (2007) 75° (1981) 0.2" NA
Jan 17 36° 60° 25° (1987) 74° (1998) 0.2" NA
Jan 18 36° 60° 27° (1977) 73° (2003) 0.21" NA
Jan 19 37° 60° 27° (1977) 71° (1994) 0.21" NA
Jan 20 37° 60° 27° (1990) 74° (1976) 0.21" NA
Jan 21 37° 60° 28° (1987) 74° (1975) 0.21" NA
Jan 22 37° 60° 26° (1982) 69° (1988) 0.21" NA
Jan 23 37° 60° 27° (1992) 71° (1988) 0.21" NA
Jan 24 37° 61° 23° (1992) 73° (1988) 0.21" NA
Jan 25 37° 61° 27° (1976) 73° (2003) 0.21" NA
Jan 26 37° 61° 29° (1976) 71° (1984) 0.21" NA
Jan 27 37° 61° 27° (1975) 73° (1986) 0.22" NA
Jan 28 37° 61° 24° (1975) 75° (1984) 0.22" NA
Jan 29 37° 61° 24° (1979) 72° (1997) 0.22" NA
Jan 30 38° 61° 22° (1975) 72° (1984) 0.22" NA
Jan 31 38° 62° 27° (1975) 75° (1976) 0.22" NA
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