Hercules, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 43° 57° 27° (1982) 76° (1962) 4.91" 0"
February 45° 61° 28° (1956) 88° (1981) 4.41" 0"
March 47° 63° 33° (1951) 85° (2005) 3.52" 0"
April 48° 66° 31° (1976) 94° (2004) 1.35" 0"
May 51° 68° 38° (1977) 100° (1976) 0.54" 0"
June 54° 71° 43° (1975) 106° (2000) 0.17" 0"
July 55° 70° 44° (1984) 98° (1970) 0.07" 0"
August 56° 71° 44° (1983) 98° (1993) 0.09" 0"
September 56° 73° 46° (1983) 107° (1971) 0.27" 0"
October 53° 72° 41° (1971) 100° (1980) 1.25" 0"
November 48° 64° 34° (1985) 86° (1966) 3.47" 0"
December 43° 57° 24° (1990) 83° (1979) 3.3" 0"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 45° 60° 38° (1957) 74° (1956) 0.11" NA
Dec 2 45° 59° 38° (1967) 73° (1959) 0.11" NA
Dec 3 44° 59° 36° (1952) 83° (1979) 0.11" NA
Dec 4 44° 59° 37° (2004) 73° (1958) 0.11" NA
Dec 5 44° 59° 34° (1972) 75° (1958) 0.1" NA
Dec 6 44° 59° 35° (1967) 76° (1979) 0.1" NA
Dec 7 44° 58° 35° (1956) 71° (1979) 0.1" NA
Dec 8 44° 58° 30° (1972) 70° (1988) 0.1" NA
Dec 9 44° 58° 24° (1972) 68° (1962) 0.1" NA
Dec 10 43° 58° 28° (1972) 64° (1950) 0.1" NA
Dec 11 43° 58° 25° (1972) 69° (1958) 0.1" NA
Dec 12 43° 58° 29° (1972) 75° (1958) 0.1" NA
Dec 13 43° 57° 28° (1972) 75° (1958) 0.1" NA
Dec 14 43° 57° 29° (1972) 67° (1981) 0.1" NA
Dec 15 43° 57° 31° (1972) 73° (1980) 0.1" NA
Dec 16 43° 57° 33° (1971) 73° (1980) 0.1" NA
Dec 17 43° 57° 32° (1965) 71° (1980) 0.1" NA
Dec 18 43° 57° 33° (1963) 72° (1958) 0.1" NA
Dec 19 43° 57° 34° (1967) 76° (1999) 0.1" NA
Dec 20 43° 57° 31° (1978) 73° (1999) 0.1" NA
Dec 21 42° 57° 28° (1990) 70° (1999) 0.1" NA
Dec 22 42° 56° 24° (1990) 70° (1999) 0.11" NA
Dec 23 42° 56° 26° (1990) 65° (1977) 0.11" NA
Dec 24 42° 56° 31° (1998) 66° (1999) 0.11" NA
Dec 25 42° 56° 31° (1990) 70° (1972) 0.11" NA
Dec 26 42° 56° 33° (1962) 71° (1967) 0.11" NA
Dec 27 42° 56° 33° (1960) 76° (1967) 0.12" NA
Dec 28 42° 56° 32° (1966) 74° (1967) 0.12" NA
Dec 29 42° 56° 33° (1954) 74° (1967) 0.12" NA
Dec 30 42° 56° 30° (1978) 70° (1967) 0.12" NA
Dec 31 42° 56° 31° (1978) 66° (1995) 0.13" NA
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