WASHINGTON DC 3 SSW, VIRGINIA

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(448902)

File last updated on May 16,
*** Note *** Provisional Data *** After Year/Month 199501
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1944 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1945 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1946 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1947 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1948 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1949 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1950 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1951 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1952 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1953 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1954 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1955 ----- z 24.25 h 35.58 45.63 50.68 53.70 65.65 64.45 54.83 41.48 29.69 q 18.00 f 51.50
1956 21.29 25.66 27.32 37.67 46.13 54.87 61.29 58.84 51.30 45.90 31.37 30.45 41.01
1957 17.45 27.39 31.32 43.33 50.13 59.60 58.13 57.29 55.80 39.32 33.33 26.16 41.61
1958 20.61 20.24 c 30.48 40.60 47.68 53.57 63.42 59.87 50.17 41.00 33.60 15.65 39.74
1959 19.06 20.46 25.71 41.20 51.13 57.57 61.55 62.61 52.83 45.03 27.93 25.77 40.91
1960 23.84 24.07 20.06 39.70 46.13 56.00 58.06 61.61 54.83 41.55 28.87 10.70 a 38.79
1961 13.10 23.82 32.81 36.40 46.10 55.23 61.06 61.19 57.83 40.39 36.63 21.26 40.49
1962 20.06 20.71 28.52 38.73 53.19 56.90 56.77 56.68 49.03 41.97 30.63 16.84 39.17
1963 14.00 14.68 31.48 39.97 a 45.06 54.53 57.87 56.19 47.39 b 39.06 33.53 17.32 37.59
1964 17.74 20.00 a 29.94 38.30 49.00 55.13 60.52 56.74 49.70 ----- z ----- z ----- z 41.90
1965 ----- z ----- z ----- z 40.33 52.13 54.20 59.81 57.68 54.83 38.48 31.57 23.23 45.81
1966 17.35 23.68 c 29.81 37.57 45.74 54.03 59.29 58.32 51.80 36.19 28.50 21.10 38.62
1967 23.13 15.25 28.81 39.20 42.29 53.50 60.35 58.39 47.90 37.87 27.70 24.65 38.25
1968 15.74 18.76 28.68 f ----- z 43.39 54.07 59.55 59.84 47.40 38.87 28.70 15.13 38.14
1969 14.10 20.68 21.65 36.43 46.33 a 58.60 62.77 57.58 50.33 35.23 30.47 27.77 38.50
1970 22.42 ----- z 27.26 38.37 49.19 55.93 60.83 b 58.39 51.67 42.65 32.76 a 25.87 a 42.30
1971 15.74 20.93 a 26.77 34.50 45.93 a 57.77 57.42 55.42 57.45 a 50.68 33.43 27.48 40.29
1972 22.45 18.83 28.68 37.00 46.81 54.20 62.81 58.32 ----- z 38.39 29.97 29.93 a 38.85
1973 21.32 20.21 34.30 a 40.17 45.03 59.40 61.06 61.97 56.03 a 45.83 g ----- z 24.61 42.41
1974 29.60 a 19.43 29.90 38.29 f 48.13 a 55.57 59.71 61.16 53.17 37.16 32.00 24.71 40.96
1975 21.32 f 24.14 28.48 37.61 l 51.23 a 58.83 61.23 61.84 52.87 44.10 34.60 24.65 44.20
1976 18.39 26.62 30.29 38.40 44.90 58.00 a 59.45 56.87 50.14 a 38.67 a 24.93 16.81 38.62
1977 10.42 18.56 a 35.00 g 40.03 48.29 53.83 61.52 60.71 56.77 39.25 c 36.40 20.83 b 40.60
1978 14.55 16.57 28.90 a 39.13 48.16 56.33 59.32 62.45 53.90 36.90 a ----- z ----- z 41.62
1979 ----- z ----- z ----- z 46.00 o 50.93 b 54.48 a 61.48 61.57 a 54.00 39.96 g 36.31 n ----- z 56.49
1980 24.89 d 20.28 d 31.10 43.00 d 51.10 b 55.95 k 62.96 e 63.00 d 56.08 e 39.21 b 31.76 i 20.41 i 43.51
1981 18.33 p ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1982 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1983 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1984 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1985 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1986 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1987 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1988 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1989 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1990 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1991 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1992 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1993 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1994 16.70 a 24.79 31.55 44.03 46.26 61.33 65.48 60.65 52.83 38.10 j 42.07 o 30.68 i 44.85
1995 26.79 q ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
Period of Record Statistics
MEAN 18.87 21.12 29.16 39.55 47.82 56.05 60.72 59.62 52.73 40.41 31.35 22.42 39.51
S.D. 4.45 3.42 3.50 2.64 2.80 2.21 2.22 2.41 3.09 3.53 3.04 5.31 1.25
SKEW 0.32 0.04 -0.81 0.48 0.10 0.73 0.41 0.09 -0.15 1.14 -0.11 -0.48 0.21
MAX 29.60 27.39 35.58 45.63 53.19 61.33 65.65 64.45 57.83 50.68 36.63 30.45 41.61
MIN 10.42 14.68 20.06 34.50 42.29 53.50 56.77 55.42 47.39 35.23 24.93 10.70 37.59
NO YRS 23 23 23 23 27 26 27 27 26 23 20 21 13