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
May 1 45° 71° 33° (1996) 86° (1986) 0.12" NA
May 2 45° 71° 34° (1979) 88° (1992) 0.12" NA
May 3 46° 71° 32° (2005) 92° (1965) 0.13" NA
May 4 46° 71° 31° (1967) 90° (2001) 0.13" NA
May 5 46° 72° 29° (1976) 88° (1980) 0.13" NA
May 6 47° 72° 36° (1968) 90° (1986) 0.13" NA
May 7 47° 72° 28° (1970) 90° (2000) 0.13" NA
May 8 47° 72° 29° (1974) 90° (2000) 0.13" NA
May 9 48° 73° 30° (1976) 91° (1963) 0.13" NA
May 10 48° 73° 31° (1983) 90° (1963) 0.13" NA
May 11 48° 73° 29° (1966) 90° (1993) 0.14" NA
May 12 49° 73° 34° (1969) 89° (1991) 0.14" NA
May 13 49° 74° 32° (1976) 92° (2000) 0.14" NA
May 14 49° 74° 32° (1996) 88° (1991) 0.14" NA
May 15 50° 74° 37° (1984) 88° (1991) 0.14" NA
May 16 50° 75° 35° (2000) 90° (1998) 0.14" NA
May 17 50° 75° 30° (1984) 89° (1986) 0.14" NA
May 18 51° 75° 33° (1973) 91° (1987) 0.14" NA
May 19 51° 75° 36° (2002) 92° (1997) 0.14" NA
May 20 51° 76° 36° (2002) 93° (1996) 0.14" NA
May 21 52° 76° 33° (1992) 92° (1996) 0.14" NA
May 22 52° 76° 31° (2002) 88° (2004) 0.14" NA
May 23 52° 76° 39° (2002) 92° (1964) 0.14" NA
May 24 52° 77° 36° (1963) 90° (1964) 0.14" NA
May 25 53° 77° 36° (1967) 92° (1991) 0.14" NA
May 26 53° 77° 38° (1967) 92° (2007) 0.14" NA
May 27 53° 78° 37° (1972) 92° (1965) 0.14" NA
May 28 54° 78° 37° (1994) 90° (1991) 0.14" NA
May 29 54° 78° 40° (1997) 97° (1969) 0.14" NA
May 30 54° 79° 38° (1996) 95° (2006) 0.14" NA
May 31 55° 79° 37° (1984) 94° (1991) 0.14" NA
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