San Bruno, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 44° 56° 26° (1949) 72° (1948) 4.19" 0"
February 46° 60° 30° (1950) 77° (1986) 4.2" 0"
March 48° 62° 31° (1966) 85° (1952) 2.96" 0"
April 49° 65° 36° (1955) 92° (1989) 1.29" 0"
May 52° 68° 39° (1950) 97° (1984) 0.47" 0"
June 54° 71° 43° (1954) 106° (1961) 0.11" 0"
July 55° 72° 44° (1951) 105° (1988) 0" 0"
August 56° 73° 45° (1955) 100° (1993) 0.04" 0"
September 56° 74° 41° (1950) 103° (1971) 0.17" 0"
October 53° 70° 37° (1949) 99° (1987) 0.95" 0"
November 49° 63° 31° (1954) 85° (1967) 2.38" 0"
December 45° 57° 24° (1972) 75° (1958) 4.03" 0"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 46° 59° 38° (1976) 70° (1959) 0.11" 0"
Dec 2 46° 59° 37° (1967) 75° (1958) 0.1" 0"
Dec 3 46° 58° 38° (1976) 73° (1958) 0.11" 0"
Dec 4 46° 58° 36° (2004) 75° (1958) 0.11" 0"
Dec 5 46° 58° 31° (1972) 69° (1979) 0.11" 0"
Dec 6 46° 58° 37° (1972) 67° (1979) 0.11" 0"
Dec 7 45° 58° 33° (1960) 69° (1979) 0.13" 0"
Dec 8 45° 57° 29° (1978) 69° (1988) 0.12" 0"
Dec 9 45° 57° 24° (1972) 67° (1950) 0.12" 0"
Dec 10 45° 57° 29° (1972) 70° (1958) 0.11" 0"
Dec 11 45° 57° 26° (1972) 74° (1958) 0.12" 0"
Dec 12 45° 57° 29° (1972) 75° (1958) 0.12" 0"
Dec 13 45° 57° 30° (1972) 69° (1958) 0.12" 0"
Dec 14 45° 57° 30° (1972) 69° (1958) 0.13" 0"
Dec 15 45° 56° 31° (1967) 71° (1980) 0.13" 0"
Dec 16 44° 56° 33° (1965) 70° (1998) 0.13" 0"
Dec 17 44° 56° 30° (1965) 67° (1958) 0.13" 0"
Dec 18 44° 56° 30° (1965) 65° (1958) 0.14" 0"
Dec 19 44° 56° 32° (1965) 68° (1999) 0.14" 0"
Dec 20 44° 56° 31° (1965) 69° (1999) 0.15" 0"
Dec 21 44° 56° 28° (1990) 68° (1999) 0.15" 0"
Dec 22 44° 56° 27° (1990) 68° (1999) 0.15" 0"
Dec 23 44° 56° 28° (1990) 64° (2004) 0.15" 0"
Dec 24 44° 56° 29° (1990) 65° (1967) 0.15" 0"
Dec 25 44° 56° 31° (1990) 68° (1967) 0.15" 0"
Dec 26 44° 56° 32° (1954) 72° (1967) 0.14" 0"
Dec 27 44° 56° 33° (1962) 70° (1953) 0.14" 0"
Dec 28 44° 56° 32° (1966) 71° (1967) 0.14" 0"
Dec 29 44° 56° 33° (1988) 65° (1989) 0.14" 0"
Dec 30 44° 56° 33° (1990) 69° (1945) 0.14" 0"
Dec 31 44° 56° 29° (1978) 67° (1996) 0.14" 0"
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