WASHINGTON DC 3 SSW, VIRGINIA

Monthly Average Maximum 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 50.75 h 59.48 70.27 79.48 79.87 91.19 87.00 78.50 71.39 60.38 q 40.12 f 77.15
1956 43.19 49.79 52.87 63.80 76.71 85.53 86.39 85.84 76.80 68.55 56.87 53.87 a 66.68
1957 42.48 48.93 54.35 68.37 77.55 83.20 88.13 86.48 80.63 63.84 58.00 48.90 66.74
1958 41.84 39.72 c 47.52 64.67 73.97 79.77 85.55 83.23 81.27 68.94 59.87 40.65 63.91
1959 42.39 47.21 55.90 67.85 d 78.23 83.83 87.03 88.65 82.10 70.29 55.97 49.10 67.38
1960 45.90 44.45 43.16 71.33 72.13 82.77 84.87 86.97 78.63 68.29 59.87 40.87 a 64.94
1961 39.87 47.29 56.65 59.87 71.19 82.30 86.74 85.16 85.10 72.16 58.77 45.32 65.87
1962 44.10 43.36 52.13 65.43 79.00 81.77 82.74 85.06 76.87 71.90 51.83 41.52 64.64
1963 41.97 39.82 58.84 68.63 75.39 82.17 87.55 86.68 77.86 b 75.61 60.63 39.55 66.22
1964 46.52 43.96 a 57.61 62.80 77.39 81.40 j 88.03 83.45 79.63 ----- z ----- z ----- z 67.42
1965 ----- z ----- z ----- z 61.13 80.94 81.43 87.26 86.71 81.47 68.00 58.73 51.87 73.06
1966 39.32 43.56 c 57.16 59.67 74.61 85.77 91.84 89.06 76.93 68.00 59.87 45.65 65.95
1967 49.39 41.79 55.52 68.43 69.35 84.37 84.42 82.52 75.23 67.94 53.20 48.23 65.03
1968 39.39 44.14 56.92 f ----- z 71.55 84.43 87.81 87.90 81.63 69.29 57.67 42.81 66.66
1969 39.74 43.21 51.83 b 68.60 77.80 a 83.93 86.16 84.81 78.90 69.35 56.53 41.26 65.18
1970 38.65 ----- z 49.71 65.43 78.65 82.53 86.41 b 86.26 83.57 68.94 55.80 48.13 a 67.64
1971 39.10 45.30 a 52.06 66.00 72.57 a 83.60 86.90 83.71 78.90 a 70.00 55.93 53.94 65.67
1972 46.03 41.93 54.58 67.03 74.06 78.60 85.03 83.71 ----- z 63.52 52.73 48.13 63.21
1973 45.68 44.11 59.30 a 63.23 71.39 83.47 86.03 84.61 80.62 a 69.83 g ----- z 45.81 66.42
1974 50.10 b 45.24 c 57.39 67.48 c 72.67 a 76.60 84.81 82.39 75.80 66.06 58.83 49.10 65.54
1975 46.56 f 46.29 49.87 63.15 j 75.47 a 81.67 82.68 85.35 71.77 70.03 61.13 45.13 66.94
1976 40.29 55.07 60.52 69.40 72.65 82.48 a 83.94 81.87 76.17 a 60.17 a 49.70 42.16 64.53
1977 31.26 46.96 63.54 g 69.90 77.65 80.53 89.00 84.13 78.87 63.20 a 54.50 43.62 b 65.42
1978 35.61 35.32 49.55 b 63.63 71.10 82.43 82.03 83.94 77.90 65.81 ----- z ----- z 64.73
1979 ----- z ----- z ----- z 66.27 o 73.86 b 78.72 a 82.13 81.73 p 76.47 63.83 h 55.81 n ----- z 77.80
1980 41.85 e 41.32 d 51.10 a 66.85 d 75.34 b 82.50 l 88.77 e 87.48 d 82.28 e 66.39 c 56.10 j 45.79 l 66.82
1981 42.46 r ----- 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 33.90 45.86 53.45 72.10 71.81 85.97 85.94 82.16 76.97 67.63 a 70.09 s 54.65 k 67.58
1995 45.57 q ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
Period of Record Statistics
MEAN 41.68 44.55 53.94 66.33 74.91 82.31 86.27 85.20 78.88 68.14 56.82 45.98 65.59
S.D. 4.56 3.96 4.31 3.44 3.10 2.33 2.46 2.03 2.92 3.32 3.15 4.31 0.96
SKEW -0.24 0.28 -0.53 -0.35 0.13 -0.57 0.19 0.08 -0.05 -0.29 -0.65 0.30 0.16
MAX 50.10 55.07 60.52 72.10 80.94 85.97 91.84 89.06 85.10 75.61 61.13 53.94 67.38
MIN 31.26 35.32 43.16 59.67 69.35 76.60 82.03 81.87 71.77 60.17 49.70 39.55 63.91
NO YRS 23 23 23 24 27 25 27 26 26 24 20 21 14