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
May 1 10.6° 25.6° 6° (1984) 36° (1976) 0" NA
May 2 10.6° 25.6° 2° (1959) 37° (1966) 0" NA
May 3 10.6° 25.6° 2° (1959) 39° (1970) 0" NA
May 4 10.6° 25.6° 6° (1951) 39° (1970) 0" NA
May 5 10.6° 25.6° 6° (1954) 32° (1953) 0" NA
May 6 11.1° 25.6° 4° (1954) 34° (1962) 0" NA
May 7 11.1° 26.1° 4° (1955) 38° (1984) 0" NA
May 8 11.1° 26.1° 6° (1978) 39° (1984) 0" NA
May 9 11.1° 26.1° 2° (1979) 37° (1984) 0.01" NA
May 10 11.1° 26.1° 2° (1959) 37° (1960) 0.01" NA
May 11 11.1° 26.1° 4° (1983) 37° (1960) 0.01" NA
May 12 11.7° 26.1° 4° (1982) 39° (1976) 0.01" NA
May 13 11.7° 26.1° 5° (1980) 39° (1976) 0.01" NA
May 14 11.7° 26.7° 6° (1972) 40° (1972) 0.01" NA
May 15 11.7° 26.7° 8° (1979) 41° (1970) 0.01" NA
May 16 11.7° 26.7° 4° (1959) 41° (1967) 0.01" NA
May 17 11.7° 26.7° 6° (1959) 39° (1970) 0.01" NA
May 18 11.7° 26.7° 7° (1977) 38° (1970) 0.01" NA
May 19 12.2° 27.2° 6° (1961) 34° (1978) 0.01" NA
May 20 12.2° 27.2° 6° (1974) 36° (1955) 0.01" NA
May 21 12.2° 27.2° 6° (1981) 38° (1967) 0.01" NA
May 22 12.2° 27.2° 8° (1975) 38° (1967) 0.01" NA
May 23 12.2° 27.8° 7° (1960) 37° (1967) 0.01" NA
May 24 12.2° 27.8° 4° (1978) 33° (1952) 0.01" NA
May 25 12.2° 27.8° 4° (1980) 43° (1974) 0.01" NA
May 26 12.8° 27.8° 4° (1980) 38° (1974) 0.01" NA
May 27 12.8° 28.3° 7° (1953) 38° (1968) 0.01" NA
May 28 12.8° 28.3° 7° (1962) 41° (1984) 0" NA
May 29 12.8° 28.3° 5° (1980) 44° (1984) 0" NA
May 30 12.8° 28.3° 4° (1959) 38° (1984) 0" NA
May 31 12.8° 28.9° 4° (1959) 36° (1977) 0" NA
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