Fontana, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 20° -5.6° (1979) 33.9° (1971) 3.5" 0"
February 21° -2.2° (1984) 33.3° (1977) 3.42" 0"
March 22° -1.1° (1966) 36.1° (1978) 3.49" 0"
April 24° -1.1° (1955) 38.9° (1984) 0.63" 0"
May 12° 27° 1.7° (1959) 44.4° (1984) 0.19" 0"
June 14° 31° 5.6° (1962) 43.9° (1961) 0.01" 0"
July 17° 35° 8.9° (1982) 45.6° (1972) 0" 0"
August 17° 35° 8.9° (1978) 43.9° (1981) 0.11" 0"
September 17° 33° 6.7° (1955) 47.2° (1971) 0.26" 0"
October 13° 28° 0.6° (1953) 42.2° (1980) 0.27" 0"
November 23° -1.1° (1983) 35.6° (1966) 1.26" 0"
December 21° -5° (1978) 33.9° (1958) 1.63" 0"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 7.8° 21.1° 1° (1952) 30° (1959) 0.04" NA
Dec 2 7.2° 21.1° 1° (1952) 33° (1958) 0.04" NA
Dec 3 7.2° 21.1° 0° (1978) 34° (1958) 0.04" NA
Dec 4 7.2° 21.1° 1° (1952) 32° (1979) 0.04" NA
Dec 5 7.2° 21.1° 0° (1978) 29° (1962) 0.04" NA
Dec 6 7.2° 20.6° -1° (1983) 31° (1977) 0.04" NA
Dec 7 7.2° 20.6° 1° (1978) 30° (1973) 0.04" NA
Dec 8 7.2° 20.6° -1° (1951) 32° (1973) 0.04" NA
Dec 9 6.7° 20.6° -5° (1978) 31° (1973) 0.04" NA
Dec 10 6.7° 20.6° 2° (1979) 32° (1973) 0.04" NA
Dec 11 6.7° 20.6° -1° (1972) 31° (1958) 0.04" NA
Dec 12 6.7° 20.6° 1° (1972) 30° (1958) 0.04" NA
Dec 13 6.7° 20.6° -1° (1959) 29° (1958) 0.05" NA
Dec 14 6.7° 20° 1° (1979) 29° (1953) 0.05" NA
Dec 15 6.7° 20° 0° (1978) 29° (1973) 0.05" NA
Dec 16 6.7° 20° 0° (1982) 29° (1958) 0.05" NA
Dec 17 6.7° 20° -1° (1982) 30° (1958) 0.05" NA
Dec 18 6.7° 20° 2° (1955) 27° (1966) 0.05" NA
Dec 19 6.7° 20° 2° (1951) 26° (1960) 0.05" NA
Dec 20 6.7° 20° 0° (1978) 33° (1954) 0.05" NA
Dec 21 6.7° 20° -2° (1968) 27° (1954) 0.06" NA
Dec 22 6.7° 20° -1° (1968) 27° (1960) 0.06" NA
Dec 23 6.7° 20° -2° (1979) 27° (1961) 0.06" NA
Dec 24 6.7° 20° -1° (1953) 27° (1960) 0.06" NA
Dec 25 6.7° 20° 0° (1965) 28° (1960) 0.06" NA
Dec 26 6.7° 20° 1° (1978) 28° (1980) 0.07" NA
Dec 27 6.7° 20° 1° (1978) 31° (1956) 0.07" NA
Dec 28 6.7° 20° -2° (1979) 31° (1956) 0.07" NA
Dec 29 6.7° 20° -2° (1954) 30° (1956) 0.08" NA
Dec 30 6.7° 19.4° -1° (1978) 33° (1956) 0.08" NA
Dec 31 6.7° 19.4° 0° (1979) 28° (1963) 0.08" NA
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