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
Dec 1 30° 51° 4° (1967) 75° (2006) 0.1" NA
Dec 2 29° 50° 0° (1967) 75° (1970) 0.1" NA
Dec 3 29° 50° 7° (1976) 74° (1998) 0.1" NA
Dec 4 29° 50° 10° (1966) 75° (1998) 0.1" NA
Dec 5 29° 49° 12° (1966) 77° (2001) 0.1" NA
Dec 6 28° 49° 9° (2002) 79° (1998) 0.1" NA
Dec 7 28° 48° 1° (2002) 77° (1998) 0.1" NA
Dec 8 28° 48° 13° (2002) 76° (1980) 0.1" NA
Dec 9 27° 48° 11° (1989) 72° (1978) 0.1" NA
Dec 10 27° 47° 4° (1989) 70° (1966) 0.1" NA
Dec 11 27° 47° 3° (1968) 71° (1979) 0.1" NA
Dec 12 27° 47° 9° (1988) 72° (1979) 0.1" NA
Dec 13 26° 47° 7° (1988) 71° (1984) 0.1" NA
Dec 14 26° 46° 3° (1989) 67° (2001) 0.1" NA
Dec 15 26° 46° 5° (1989) 71° (1971) 0.1" NA
Dec 16 26° 46° 10° (1989) 72° (1971) 0.1" NA
Dec 17 26° 45° 3° (1989) 70° (1984) 0.1" NA
Dec 18 25° 45° 3° (1989) 76° (2006) 0.1" NA
Dec 19 25° 45° -2° (1989) 63° (1967) 0.1" NA
Dec 20 25° 45° 8° (1991) 64° (1988) 0.1" NA
Dec 21 25° 44° 4° (1989) 60° (1998) 0.1" NA
Dec 22 25° 44° 2° (1989) 67° (1984) 0.1" NA
Dec 23 24° 44° 4° (1989) 68° (1990) 0.09" NA
Dec 24 24° 44° 1° (1983) 66° (1982) 0.09" NA
Dec 25 24° 43° -4° (1989) 71° (1982) 0.09" NA
Dec 26 24° 43° -1° (1983) 71° (1964) 0.1" NA
Dec 27 24° 43° 1° (1989) 73° (1971) 0.1" NA
Dec 28 24° 43° 8° (1966) 73° (1984) 0.1" NA
Dec 29 23° 43° 7° (1977) 78° (1984) 0.1" NA
Dec 30 23° 42° 4° (1963) 67° (1990) 0.1" NA
Dec 31 23° 42° 1° (1993) 73° (1992) 0.1" NA
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