WASHINGTON NATL WSCMO A, VIRGINIA

Monthly Average Temperature (Degrees Fahrenheit)

(448906)

File last updated on May 16,
*** Note *** Provisional Data *** After Year/Month 201205
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
1948 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 75.79 69.42 56.13 51.42 40.11 58.57
1949 42.61 43.86 45.18 55.05 65.95 75.13 80.97 77.60 67.10 63.35 48.10 41.90 58.90
1950 47.94 38.64 41.68 52.37 64.52 73.92 76.15 75.58 66.87 61.03 47.92 35.55 56.85
1951 39.29 38.52 45.53 55.87 64.94 73.35 78.66 76.76 70.30 62.06 44.07 40.85 57.52
1952 40.68 41.05 43.31 56.97 64.19 76.87 80.53 76.15 68.88 55.26 48.23 38.82 57.58
1953 40.71 42.59 47.47 56.10 70.03 74.55 79.58 76.31 69.72 60.50 48.12 40.89 58.88
1954 35.87 43.50 44.47 59.62 62.60 74.35 78.74 75.18 73.25 62.02 45.15 37.06 57.65
1955 35.40 37.75 47.10 58.23 67.10 70.18 82.08 78.29 69.87 59.55 45.48 33.56 57.05
1956 34.50 41.09 43.15 53.58 63.55 73.25 75.55 74.94 66.62 59.03 46.12 44.15 56.29
1957 32.90 41.38 45.81 59.18 67.18 76.55 79.13 75.63 71.87 55.39 49.55 41.37 57.99
1958 34.35 31.21 41.35 57.07 65.21 71.27 79.10 75.39 69.07 59.10 49.83 32.85 55.48
1959 34.89 39.02 45.42 58.42 69.74 75.93 78.50 80.24 73.13 62.24 46.78 42.00 58.86
1960 38.15 38.28 35.56 61.22 63.66 74.13 77.00 78.47 71.27 58.69 48.43 30.97 56.32
1961 29.79 38.29 47.56 51.97 62.23 73.18 78.58 77.55 74.82 59.53 50.15 36.34 56.67
1962 34.55 34.55 44.16 56.23 68.65 73.75 75.26 76.50 b 66.92 60.27 44.85 33.16 55.74
1963 31.35 31.00 48.52 57.75 64.89 73.67 77.60 75.35 66.47 61.11 49.80 31.10 55.72
1964 36.24 36.83 47.47 54.03 68.10 75.98 79.05 75.48 69.90 55.02 50.95 39.90 57.41
1965 33.35 36.77 41.42 51.75 69.11 72.60 78.19 77.23 72.58 57.45 49.48 41.44 56.78
1966 32.39 36.20 47.48 52.73 65.00 75.98 80.89 78.68 68.58 56.97 49.48 37.52 56.82
1967 40.97 33.96 44.94 57.55 59.98 74.68 77.19 76.15 67.93 57.90 45.02 39.82 56.34
1968 31.37 34.28 49.63 57.93 63.69 74.08 79.89 79.21 72.03 61.26 49.95 36.60 57.49
1969 34.16 36.88 43.03 58.63 68.39 77.08 79.47 76.31 70.12 58.79 47.18 36.23 57.19
1970 29.98 37.09 41.84 55.23 68.24 75.17 79.23 78.95 74.98 62.50 49.25 39.68 57.68
1971 31.29 39.05 43.18 54.98 63.69 75.90 78.32 76.68 73.02 64.68 48.12 45.50 57.87
1972 38.44 36.50 45.52 54.08 64.52 70.13 77.45 75.90 70.97 55.98 46.72 43.60 56.65
1973 37.56 37.02 51.10 55.93 62.79 77.10 79.21 79.90 74.27 63.31 51.57 41.89 59.30
1974 42.89 39.18 49.11 58.30 65.11 71.45 78.95 78.34 70.22 57.26 50.83 43.02 58.72
1975 40.92 40.59 45.16 53.57 69.66 76.33 79.24 80.05 68.50 63.13 54.40 40.50 59.34
1976 33.84 46.90 51.34 59.92 64.97 77.57 78.39 76.71 70.33 55.40 42.98 35.47 57.82
1977 25.39 38.75 52.61 60.10 69.40 74.25 80.84 78.77 73.90 59.02 51.75 38.03 58.57
1978 32.44 31.39 44.34 57.72 65.81 76.67 78.82 81.26 73.55 59.42 52.17 43.11 58.06
1979 35.11 28.39 51.53 56.02 67.66 72.42 78.58 78.47 71.58 58.55 54.42 43.68 58.03
1980 37.19 36.09 46.21 60.10 69.48 74.82 82.34 82.77 77.12 59.90 48.53 39.74 59.52
1981 32.97 43.64 47.61 62.02 66.18 78.70 80.21 77.03 71.02 58.29 51.35 38.42 58.95
1982 28.08 38.32 45.63 53.97 69.00 72.77 80.21 75.32 70.63 60.13 51.75 45.50 57.61
1983 38.08 38.71 48.74 53.23 64.85 75.03 81.19 80.98 72.63 60.44 50.30 35.97 58.35
1984 32.21 43.76 41.82 54.85 64.85 76.88 76.47 77.82 68.25 65.13 46.00 45.58 57.80
1985 30.74 37.77 47.68 61.55 68.06 72.32 78.98 76.74 71.87 61.15 54.30 36.39 58.13
1986 35.34 35.27 47.39 56.20 68.03 76.63 81.05 74.60 70.93 61.11 46.48 39.73 57.73
1987 34.69 36.98 47.71 54.80 67.18 76.35 82.55 78.66 72.03 54.32 49.85 41.45 58.05
1988 30.95 37.29 47.23 54.35 65.79 74.40 81.87 80.65 68.92 54.37 49.90 38.68 57.03
1989 39.84 37.77 46.10 55.37 64.08 76.80 78.27 77.02 71.35 60.40 47.93 27.87 56.90
1990 43.56 45.20 50.21 56.80 64.24 74.95 79.34 76.48 69.58 62.73 52.00 44.48 59.96
1991 38.55 42.96 48.76 58.18 72.95 76.78 81.42 80.00 70.98 60.37 48.80 42.29 60.17
1992 38.19 41.19 44.98 55.42 62.29 71.68 79.48 73.92 69.15 55.92 48.80 39.61 56.72
1993 39.68 34.29 42.23 54.75 67.39 75.27 83.10 79.55 70.92 58.03 48.77 38.11 57.67
1994 28.76 36.29 45.35 61.95 63.05 79.37 81.81 75.47 70.17 59.06 53.35 44.16 58.23
1995 39.55 34.32 49.15 56.28 65.79 74.62 81.44 81.26 70.93 62.27 43.12 35.63 57.86
1996 32.82 37.22 42.90 56.80 63.89 77.17 77.58 76.52 70.53 59.39 44.12 42.95 56.82
1997 36.97 44.66 48.69 53.95 62.89 73.12 80.35 77.61 70.42 59.58 46.13 41.00 57.95
1998 42.97 43.36 46.89 57.43 67.48 72.95 78.89 79.44 75.40 60.03 50.28 44.42 59.96
1999 38.13 40.93 43.98 a 56.52 67.29 74.65 82.95 79.61 69.97 57.15 53.12 41.95 58.85
2000 35.84 42.14 a 51.66 55.60 67.82 74.68 74.65 75.08 67.62 60.15 46.63 31.79 56.97
2001 35.52 40.86 43.74 57.57 65.89 75.18 75.23 78.90 68.93 59.68 54.82 45.45 58.48
2002 41.65 42.61 47.65 59.95 65.19 76.10 80.92 81.08 73.03 58.63 47.08 37.23 59.26
2003 31.08 33.64 47.08 55.10 61.71 71.32 77.74 78.76 70.45 57.45 53.10 39.16 56.38
2004 30.55 38.10 48.79 57.35 71.77 73.42 78.53 75.87 71.60 58.26 50.98 40.03 57.94
2005 36.05 39.55 43.02 57.30 61.89 75.67 80.47 80.10 74.98 60.44 50.22 36.39 58.00
2006 43.03 38.61 47.85 59.47 65.06 74.53 80.44 80.53 67.77 57.27 50.72 44.21 59.12
2007 40.69 30.86 47.71 53.60 67.84 76.08 79.24 79.69 72.92 67.05 49.77 41.77 58.94
2008 39.98 41.00 49.00 58.88 64.71 77.87 80.74 77.85 73.95 58.87 46.63 40.27 59.15
2009 31.61 39.82 45.18 56.98 65.47 73.65 76.87 79.84 70.22 58.47 52.20 37.85 57.35
2010 35.26 34.21 51.19 60.83 69.34 80.55 83.06 80.13 75.48 61.52 50.45 34.63 59.72
2011 33.65 41.73 45.63 58.78 68.31 78.75 84.48 79.94 71.27 58.35 52.43 45.03 59.86
2012 40.74 44.34 56.76 58.38 a 69.00 v ----- z ----- z ----- z ----- z ----- z ----- z ----- z 50.06
Period of Record Statistics
MEAN 36.00 38.50 46.41 56.76 66.04 74.93 79.41 77.86 70.92 59.50 49.19 39.44 57.89
S.D. 4.47 3.89 3.37 2.52 2.62 2.16 2.07 2.05 2.40 2.63 2.87 4.04 1.13
SKEW 0.15 -0.24 -0.01 0.13 0.22 0.03 -0.07 0.21 0.32 0.26 -0.14 -0.58 0.11
MAX 47.94 46.90 56.76 62.02 72.95 80.55 84.48 82.77 77.12 67.05 54.82 45.58 60.17
MIN 25.39 28.39 35.56 51.75 59.98 70.13 74.65 73.92 66.47 54.32 42.98 27.87 55.48
NO YRS 64 64 64 64 63 63 63 64 64 64 64 64 63