San Marcos, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 43° 69° 25° (2007) 92° (2003) 3.03" 0"
February 45° 69° 27° (1990) 94° (1988) 3.52" 0"
March 47° 71° 33° (1985) 97° (1988) 2.65" 0"
April 51° 75° 36° (1999) 103° (1989) 1.15" 0"
May 55° 78° 31° (2003) 103° (2004) 0.25" 0"
June 59° 82° 41° (2003) 105° (1994) 0.12" 0"
July 62° 87° 52° (1980) 112° (2006) 0.08" 0"
August 63° 89° 54° (1991) 109° (1994) 0.08" 0"
September 62° 87° 49° (1982) 108° (1988) 0.21" 0"
October 55° 81° 39° (1981) 105° (1991) 0.71" 0"
November 48° 74° 29° (1979) 98° (1997) 1.17" 0"
December 42° 68° 26° (1990) 90° (1980) 2.14" 0"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Aug 1 63° 89° 57° (1998) 97° (1980) 0" 0"
Aug 2 63° 89° 55° (1984) 96° (1997) 0" 0"
Aug 3 63° 89° 58° (1994) 99° (1998) 0.01" 0"
Aug 4 63° 89° 55° (1985) 99° (1998) 0" 0"
Aug 5 63° 89° 55° (1985) 103° (1997) 0" 0"
Aug 6 63° 89° 56° (1985) 103° (1997) 0" 0"
Aug 7 63° 89° 56° (2004) 96° (1997) 0" 0"
Aug 8 63° 89° 55° (2002) 96° (1980) 0.01" 0"
Aug 9 63° 89° 57° (1999) 99° (1994) 0" 0"
Aug 10 63° 89° 61° (1979) 99° (2003) 0" 0"
Aug 11 63° 89° 60° (1999) 100° (2000) 0" 0"
Aug 12 63° 89° 57° (1999) 109° (1994) 0.01" 0"
Aug 13 63° 89° 58° (1988) 103° (1994) 0" 0"
Aug 14 63° 89° 56° (1988) 99° (2003) 0" 0"
Aug 15 64° 89° 55° (1988) 102° (1994) 0.01" 0"
Aug 16 64° 89° 57° (1987) 101° (1992) 0" 0"
Aug 17 64° 89° 59° (1982) 104° (1992) 0" 0"
Aug 18 64° 89° 58° (1995) 99° (1992) 0" 0"
Aug 19 64° 89° 58° (1999) 99° (2007) 0.01" 0"
Aug 20 64° 89° 58° (1985) 101° (1992) 0" 0"
Aug 21 64° 89° 56° (1993) 99° (1982) 0" 0"
Aug 22 64° 89° 55° (1979) 95° (1998) 0.01" 0"
Aug 23 64° 89° 58° (1979) 97° (1997) 0" 0"
Aug 24 63° 89° 56° (1987) 99° (1979) 0" 0"
Aug 25 63° 89° 55° (2002) 104° (1985) 0" 0"
Aug 26 63° 89° 55° (1987) 99° (1981) 0.01" 0"
Aug 27 63° 89° 55° (1987) 102° (1981) 0" 0"
Aug 28 63° 89° 57° (1991) 100° (1981) 0" 0"
Aug 29 63° 89° 54° (1991) 106° (1998) 0" 0"
Aug 30 63° 89° 55° (1980) 104° (1998) 0.01" 0"
Aug 31 63° 89° 56° (1989) 103° (2002) 0" 0"
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