San Marcos, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 42° 68° 25° (2007) 92° (2003) 3.37" NA
February 45° 69° 27° (1990) 94° (1988) 3.16" NA
March 47° 70° 33° (1985) 97° (1988) 3.3" NA
April 50° 75° 36° (1999) 103° (1989) 1.04" NA
May 54° 77° 31° (2003) 103° (2004) 0.27" NA
June 58° 84° 41° (2003) 105° (1994) 0.11" NA
July 61° 89° 52° (1980) 112° (2006) 0.07" NA
August 63° 89° 54° (1991) 109° (1994) 0.02" NA
September 61° 87° 49° (1982) 108° (1988) 0.22" NA
October 55° 81° 39° (1981) 105° (1991) 0.44" NA
November 46° 74° 29° (1979) 98° (1997) 1.32" NA
December 42° 69° 26° (1990) 90° (1980) 1.78" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 52° 76° 42° (1999) 92° (1996) 0.01" NA
May 2 52° 76° 44° (1988) 100° (2004) 0.01" NA
May 3 52° 76° 44° (1988) 103° (2004) 0.01" NA
May 4 53° 76° 48° (1988) 88° (1987) 0.01" NA
May 5 53° 76° 47° (1999) 97° (1990) 0.01" NA
May 6 53° 76° 31° (2003) 99° (1990) 0.01" NA
May 7 53° 76° 46° (1983) 94° (2004) 0.01" NA
May 8 53° 76° 41° (1986) 95° (2007) 0.01" NA
May 9 53° 76° 46° (1979) 93° (1993) 0.01" NA
May 10 54° 77° 42° (2003) 91° (1993) 0.01" NA
May 11 54° 77° 46° (2003) 94° (1996) 0.01" NA
May 12 54° 77° 44° (1982) 95° (1979) 0.01" NA
May 13 54° 77° 48° (1980) 99° (1979) 0.01" NA
May 14 54° 77° 42° (1981) 99° (1979) 0.01" NA
May 15 54° 77° 41° (2003) 94° (1997) 0.01" NA
May 16 55° 77° 35° (2003) 87° (1997) 0.01" NA
May 17 55° 77° 33° (2003) 90° (1986) 0.01" NA
May 18 55° 77° 33° (2003) 90° (1983) 0.01" NA
May 19 55° 78° 47° (1994) 87° (1983) 0.01" NA
May 20 55° 78° 31° (2003) 89° (1988) 0.01" NA
May 21 55° 78° 45° (1981) 95° (2005) 0.01" NA
May 22 55° 78° 46° (2002) 90° (1988) 0.01" NA
May 23 55° 78° 48° (2002) 97° (2001) 0.01" NA
May 24 56° 79° 47° (1980) 87° (1993) 0.01" NA
May 25 56° 79° 45° (1980) 83° (1986) 0.01" NA
May 26 56° 79° 44° (1980) 83° (1983) 0.01" NA
May 27 56° 79° 49° (1980) 91° (2000) 0.01" NA
May 28 56° 79° 43° (2003) 97° (1997) 0" NA
May 29 56° 80° 47° (1980) 96° (1997) 0" NA
May 30 56° 80° 49° (1988) 94° (1997) 0" NA
May 31 56° 80° 48° (1988) 93° (2004) 0" NA
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