Dulles, Virginia
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 22° 41° -18° (1984) 75° (1975) 3.05" 8.1"
February 24° 46° -14° (1979) 79° (2000) 2.77" 6.2"
March 32° 55° -1° (1993) 89° (1998) 3.55" 3.4"
April 40° 66° 17° (1969) 93° (2002) 3.22" 0.4"
May 50° 75° 28° (1970) 97° (1969) 4.22" 0"
June 59° 83° 36° (1977) 100° (1964) 4.07" 0"
July 64° 87° 41° (1988) 104° (1988) 3.57" 0"
August 63° 86° 38° (1982) 104° (1983) 3.78" 0"
September 56° 79° 30° (1974) 99° (1983) 3.82" 0"
October 42° 68° 15° (1969) 94° (2007) 3.37" 0.1"
November 34° 57° 9° (1989) 84° (1982) 3.31" 0.8"
December 26° 46° -4° (1989) 79° (1998) 3.07" 2.2"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jul 1 62° 86° 41° (1988) 94° (1968) 0.12" NA
Jul 2 63° 86° 44° (1988) 98° (1966) 0.12" NA
Jul 3 63° 86° 50° (1977) 103° (1966) 0.12" NA
Jul 4 63° 86° 48° (1986) 97° (2002) 0.12" NA
Jul 5 63° 87° 50° (1996) 99° (1999) 0.12" NA
Jul 6 63° 87° 45° (1979) 102° (1977) 0.12" NA
Jul 7 63° 87° 47° (1970) 101° (1988) 0.12" NA
Jul 8 64° 87° 48° (1984) 100° (1993) 0.12" NA
Jul 9 64° 87° 48° (1984) 99° (1993) 0.12" NA
Jul 10 64° 87° 53° (1963) 99° (1993) 0.12" NA
Jul 11 64° 87° 52° (1983) 98° (1988) 0.12" NA
Jul 12 64° 87° 47° (2002) 97° (1986) 0.12" NA
Jul 13 64° 87° 52° (1978) 97° (1986) 0.12" NA
Jul 14 64° 87° 54° (1980) 98° (1993) 0.12" NA
Jul 15 64° 87° 53° (1987) 98° (1995) 0.11" NA
Jul 16 64° 88° 57° (1991) 104° (1988) 0.11" NA
Jul 17 64° 88° 55° (1976) 100° (1997) 0.11" NA
Jul 18 64° 88° 51° (1985) 100° (1986) 0.11" NA
Jul 19 64° 88° 53° (1976) 98° (1977) 0.11" NA
Jul 20 64° 88° 55° (1974) 101° (1980) 0.11" NA
Jul 21 65° 88° 48° (1966) 101° (1991) 0.11" NA
Jul 22 65° 88° 50° (1974) 98° (1998) 0.11" NA
Jul 23 65° 88° 50° (1983) 99° (1991) 0.11" NA
Jul 24 65° 88° 48° (1985) 97° (1987) 0.11" NA
Jul 25 65° 88° 55° (1976) 97° (1987) 0.11" NA
Jul 26 65° 88° 50° (1976) 98° (1966) 0.11" NA
Jul 27 65° 88° 52° (1977) 98° (1993) 0.11" NA
Jul 28 65° 88° 47° (1977) 99° (1993) 0.11" NA
Jul 29 64° 88° 53° (1978) 97° (1993) 0.11" NA
Jul 30 64° 88° 51° (1981) 98° (1988) 0.12" NA
Jul 31 64° 88° 50° (1997) 98° (1999) 0.12" NA
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