Dulles, Virginia
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 24° 42° -18° (1984) 75° (1975) 2.68" 7.3"
February 26° 47° -14° (1979) 79° (2000) 2.83" 7.6"
March 33° 56° -1° (1993) 89° (1998) 3.38" 2.8"
April 42° 67° 17° (1969) 93° (2002) 3.47" 0.3"
May 51° 75° 28° (1970) 97° (1969) 4.55" 0"
June 61° 84° 36° (1977) 100° (1964) 3.98" 0"
July 66° 88° 41° (1988) 104° (1988) 3.67" 0"
August 64° 87° 38° (1982) 104° (1983) 3.53" 0"
September 56° 79° 30° (1974) 99° (1983) 3.92" 0"
October 44° 68° 15° (1969) 94° (2007) 3.25" 0"
November 35° 58° 9° (1989) 84° (1982) 3.41" 0.5"
December 27° 46° -4° (1989) 79° (1998) 2.96" 3.5"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 47° 71° 33° (1996) 90° (2010) 0.13" 0"
May 2 47° 72° 34° (1979) 88° (2010) 0.12" 0"
May 3 47° 72° 32° (2005) 92° (1965) 0.14" 0"
May 4 47° 72° 31° (1967) 90° (2001) 0.13" 0"
May 5 48° 72° 29° (1976) 88° (1980) 0.14" 0"
May 6 48° 73° 36° (1968) 90° (1986) 0.13" 0"
May 7 48° 73° 28° (1970) 90° (2000) 0.14" 0"
May 8 49° 73° 29° (1974) 90° (2000) 0.13" 0"
May 9 49° 73° 30° (1976) 91° (1963) 0.14" 0"
May 10 49° 74° 31° (1983) 90° (1963) 0.15" 0"
May 11 50° 74° 29° (1966) 90° (1993) 0.14" 0"
May 12 50° 74° 34° (1969) 89° (1991) 0.15" 0"
May 13 50° 74° 32° (1976) 92° (2000) 0.15" 0"
May 14 51° 75° 32° (1996) 89° (2010) 0.16" 0"
May 15 51° 75° 37° (1984) 88° (1991) 0.16" 0"
May 16 51° 75° 35° (2000) 90° (1998) 0.15" 0"
May 17 51° 75° 30° (1984) 89° (1986) 0.16" 0"
May 18 52° 76° 33° (1973) 91° (1987) 0.15" 0"
May 19 52° 76° 36° (2002) 92° (1997) 0.15" 0"
May 20 52° 76° 36° (2002) 93° (1996) 0.15" 0"
May 21 53° 76° 33° (1992) 92° (1996) 0.16" 0"
May 22 53° 77° 31° (2002) 88° (2004) 0.15" 0"
May 23 53° 77° 39° (2002) 92° (1964) 0.16" 0"
May 24 54° 77° 36° (1963) 90° (1964) 0.15" 0"
May 25 54° 77° 36° (1967) 92° (1991) 0.16" 0"
May 26 54° 78° 38° (1967) 92° (2007) 0.14" 0"
May 27 55° 78° 37° (1972) 92° (2010) 0.15" 0"
May 28 55° 78° 37° (1994) 90° (1991) 0.15" 0"
May 29 56° 79° 40° (1997) 97° (1969) 0.16" 0"
May 30 56° 79° 38° (1996) 95° (2006) 0.15" 0"
May 31 56° 79° 37° (1984) 94° (1991) 0.15" 0"
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