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
Sep 1 17.2° 33.9° 12° (1965) 43° (1955) 0.01" NA
Sep 2 17.2° 33.9° 9° (1979) 44° (1955) 0.01" NA
Sep 3 17.2° 33.9° 10° (1953) 44° (1955) 0.01" NA
Sep 4 17.2° 33.9° 10° (1951) 43° (1955) 0.01" NA
Sep 5 17.2° 33.9° 11° (1951) 46° (1955) 0.01" NA
Sep 6 17.2° 33.9° 10° (1951) 47° (1955) 0.01" NA
Sep 7 16.7° 33.9° 11° (1951) 43° (1955) 0.01" NA
Sep 8 16.7° 33.3° 11° (1978) 43° (1979) 0.01" NA
Sep 9 16.7° 33.3° 11° (1980) 44° (1979) 0.01" NA
Sep 10 16.7° 33.3° 10° (1952) 42° (1953) 0.01" NA
Sep 11 16.7° 33.3° 9° (1952) 44° (1971) 0.01" NA
Sep 12 16.7° 33.3° 9° (1952) 46° (1971) 0.01" NA
Sep 13 16.7° 32.8° 11° (1966) 47° (1971) 0.01" NA
Sep 14 16.7° 32.8° 11° (1954) 45° (1971) 0.01" NA
Sep 15 16.7° 32.8° 9° (1980) 40° (1979) 0.01" NA
Sep 16 16.7° 32.8° 12° (1957) 40° (1951) 0.01" NA
Sep 17 16.7° 32.8° 11° (1953) 41° (1951) 0.01" NA
Sep 18 16.1° 32.2° 10° (1977) 39° (1951) 0.01" NA
Sep 19 16.1° 32.2° 10° (1955) 40° (1979) 0.01" NA
Sep 20 16.1° 32.2° 11° (1982) 39° (1954) 0.01" NA
Sep 21 16.1° 32.2° 12° (1954) 41° (1974) 0.01" NA
Sep 22 16.1° 32.2° 9° (1978) 41° (1974) 0.01" NA
Sep 23 16.1° 31.7° 11° (1980) 41° (1982) 0.01" NA
Sep 24 15.6° 31.7° 11° (1980) 42° (1968) 0.01" NA
Sep 25 15.6° 31.7° 11° (1966) 42° (1963) 0.01" NA
Sep 26 15.6° 31.7° 11° (1981) 42° (1978) 0.01" NA
Sep 27 15.6° 31.1° 10° (1951) 42° (1963) 0" NA
Sep 28 15.6° 31.1° 10° (1980) 42° (1963) 0" NA
Sep 29 15.6° 31.1° 9° (1962) 42° (1963) 0" NA
Sep 30 15° 31.1° 7° (1955) 42° (1980) 0" NA
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