WASHINGTON NATL WSCMO A, VIRGINIA

Monthly Average Maximum 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 84.81 78.83 64.58 60.47 47.87 67.31
1949 50.55 52.50 52.55 64.53 76.19 83.43 89.13 85.52 76.13 71.68 57.03 49.58 67.40
1950 56.97 45.79 50.90 62.40 73.13 83.13 84.32 83.84 74.07 70.55 57.73 42.52 65.45
1951 48.03 47.36 54.39 66.07 75.23 82.17 87.94 85.35 79.50 70.77 52.50 48.32 66.47
1952 47.74 48.48 51.74 66.47 73.35 86.70 89.65 84.61 78.77 66.48 56.53 45.45 66.33
1953 48.10 51.36 55.87 65.60 79.26 83.50 89.16 85.87 79.80 70.90 58.40 49.23 68.09
1954 44.06 53.14 53.61 70.93 71.58 84.40 89.58 83.45 83.63 71.55 52.83 44.06 66.90
1955 42.06 47.00 56.26 68.03 76.52 79.17 90.68 85.68 76.93 69.97 54.87 40.42 65.63
1956 40.52 48.83 51.90 63.23 74.10 82.50 83.65 83.26 75.03 66.52 54.20 52.16 64.66
1957 40.10 48.71 53.68 69.47 77.32 85.70 89.45 85.19 79.60 63.52 57.13 48.81 66.56
1958 40.71 37.64 47.32 66.23 74.42 80.43 87.39 83.39 78.43 67.94 58.00 39.90 63.48
1959 43.74 48.54 55.84 69.27 79.16 85.60 86.52 88.06 82.07 69.94 55.67 49.29 67.81
1960 44.23 45.45 42.90 72.80 72.77 83.33 85.87 86.87 79.20 67.13 58.10 39.29 64.83
1961 37.13 45.93 56.84 61.37 71.74 82.37 87.42 85.39 83.53 70.13 57.43 43.10 65.20
1962 42.52 41.00 52.48 65.90 78.23 81.83 84.13 85.66 b 75.57 69.48 52.63 40.32 64.15
1963 39.16 39.39 58.94 68.87 75.19 83.17 87.52 85.52 76.60 74.26 59.03 38.52 65.51
1964 46.13 45.00 58.48 64.30 79.55 87.10 88.42 85.26 80.50 65.58 62.37 48.13 67.57
1965 41.65 47.18 50.23 61.50 80.84 82.80 88.00 86.94 81.93 68.19 58.87 50.45 66.55
1966 39.68 44.25 58.45 61.83 75.90 87.30 91.03 88.48 77.33 67.74 59.57 44.45 66.34
1967 49.55 43.00 55.16 69.40 70.71 85.77 86.06 85.03 78.57 68.81 54.00 48.06 66.18
1968 40.26 43.93 61.48 69.60 74.06 84.23 88.81 88.61 83.03 70.68 57.90 44.26 67.24
1969 41.26 43.61 52.65 69.97 79.77 86.57 88.13 85.61 79.40 70.03 55.93 42.87 66.32
1970 38.29 47.00 50.61 65.50 79.42 85.40 88.61 88.52 85.23 70.90 57.07 47.26 66.98
1971 38.48 47.50 52.10 67.57 73.26 84.77 87.23 86.00 80.53 71.74 56.57 54.23 66.66
1972 46.06 45.41 54.58 64.73 73.58 78.60 85.06 84.61 79.70 65.29 54.57 50.65 65.24
1973 46.45 45.82 59.61 65.27 72.32 85.97 88.29 88.61 83.10 73.90 61.73 49.00 68.34
1974 50.58 48.25 58.97 70.10 74.90 80.37 88.68 87.00 79.43 68.58 59.97 50.77 68.13
1975 49.29 48.18 53.42 62.47 79.16 84.47 87.19 88.71 76.00 72.97 65.20 48.19 67.94
1976 41.39 57.97 61.55 72.50 74.97 86.97 87.68 85.55 79.77 63.13 52.07 43.84 67.28
1977 33.32 49.64 62.35 71.50 79.90 83.60 90.23 87.39 81.47 67.19 57.63 45.45 67.47
1978 39.42 38.32 52.26 68.10 74.52 86.37 87.03 88.71 82.03 69.13 59.93 51.65 66.46
1979 41.90 35.25 61.74 64.23 76.32 81.33 86.03 86.23 78.43 67.00 63.53 52.00 66.17
1980 43.35 43.69 55.19 69.57 79.00 84.63 91.03 92.00 86.33 68.65 56.57 47.48 68.12
1981 40.45 53.50 57.19 72.17 75.68 87.10 87.84 85.32 79.30 67.32 59.57 44.97 67.53
1982 36.06 46.43 54.45 64.93 79.00 80.43 88.45 83.87 79.23 69.39 61.17 53.03 66.37
1983 45.06 47.39 57.10 61.97 74.35 83.33 90.65 89.94 82.23 68.71 59.53 42.35 66.89
1984 39.58 51.45 49.71 64.03 74.13 86.87 83.87 85.32 76.60 72.10 54.77 53.39 65.98
1985 37.97 46.18 56.87 72.83 77.06 80.73 88.00 84.65 81.60 69.13 61.10 44.55 66.72
1986 43.68 40.54 58.23 65.60 78.87 87.43 90.10 82.52 79.13 70.03 54.03 46.77 66.41
1987 41.19 44.89 57.84 63.43 77.19 85.97 92.23 87.26 80.07 64.77 59.40 48.42 66.89
1988 38.42 45.79 57.55 63.47 75.35 85.03 92.42 89.71 77.90 63.97 58.63 46.90 66.26
1989 47.61 45.07 54.94 64.83 72.84 84.73 85.71 84.68 79.53 70.35 56.47 34.74 65.13
1990 52.29 55.14 60.10 67.33 73.13 84.80 87.87 84.19 78.10 72.45 62.37 53.10 69.24
1991 46.32 52.39 57.23 67.77 83.06 86.77 90.61 89.16 79.93 70.23 57.33 50.39 69.27
1992 46.19 49.69 53.58 65.10 71.90 81.17 87.65 82.35 77.00 64.77 56.23 46.03 65.14
1993 46.81 42.50 49.90 64.73 77.23 85.13 92.48 89.03 79.07 66.90 57.80 44.61 66.35
1994 36.29 44.75 54.55 72.77 74.06 90.03 90.61 83.84 79.27 68.52 62.90 51.61 67.43
1995 46.23 42.39 59.13 67.10 75.29 83.23 90.35 90.68 79.87 71.84 50.70 42.42 66.60
1996 40.19 44.55 51.81 66.90 72.65 86.37 85.45 85.00 78.20 68.23 51.50 49.81 65.05
1997 44.52 52.75 57.94 63.93 74.00 82.63 90.29 87.32 79.77 68.87 53.07 48.16 66.94
1998 49.90 50.11 55.13 66.93 75.84 81.13 87.87 89.03 85.17 68.61 59.43 52.00 68.43
1999 46.35 49.25 52.77 a 66.40 77.87 83.63 92.84 88.77 77.67 65.90 61.80 49.35 67.72
2000 43.23 51.00 a 61.65 64.50 77.00 82.83 82.16 82.39 75.53 69.97 55.10 38.55 65.33
2001 42.81 49.93 52.26 68.00 75.03 83.53 83.68 86.71 77.83 70.61 65.03 53.19 67.38
2002 49.74 52.54 57.32 70.27 75.35 85.80 89.71 90.39 81.73 65.58 54.70 44.23 68.11
2003 37.32 39.71 57.00 64.77 68.32 79.07 85.29 85.90 77.80 66.03 61.60 46.52 64.11
2004 37.71 46.55 58.03 66.43 80.65 81.43 85.81 82.94 79.07 65.71 58.80 48.10 65.94
2005 42.90 48.18 51.16 67.17 70.94 84.20 88.32 87.90 84.70 67.81 59.70 43.19 66.35
2006 51.19 46.61 57.42 69.67 74.90 83.33 88.84 89.19 74.87 66.16 58.43 52.84 67.79
2007 48.16 38.07 58.03 62.63 77.65 85.00 88.81 88.26 82.30 76.35 57.70 47.68 67.55
2008 47.58 49.62 58.32 67.53 74.29 87.23 89.45 86.61 81.90 67.74 53.23 47.90 67.62
2009 38.26 49.54 53.61 66.80 73.77 81.50 85.77 88.35 77.93 66.10 59.47 44.26 65.45
2010 42.55 40.14 59.84 71.67 78.35 89.80 92.26 88.39 85.37 70.26 59.20 40.74 68.21
2011 39.71 51.25 54.03 68.57 77.35 87.90 93.58 88.58 77.60 66.52 61.53 52.65 68.27
2012 49.29 52.41 66.35 68.24 a 77.89 v ----- z ----- z ----- z ----- z ----- z ----- z ----- z 59.08
Period of Record Statistics
MEAN 43.57 46.80 55.55 66.84 75.71 84.16 88.24 86.47 79.64 68.68 57.79 46.88 66.67
S.D. 4.73 4.55 3.99 3.07 2.88 2.53 2.49 2.25 2.74 2.73 3.30 4.36 1.24
SKEW 0.31 -0.24 -0.21 0.22 0.10 -0.03 -0.13 0.17 0.39 0.21 -0.01 -0.45 -0.20
MAX 56.97 57.97 66.35 72.83 83.06 90.03 93.58 92.00 86.33 76.35 65.20 54.23 69.27
MIN 33.32 35.25 42.90 61.37 68.32 78.60 82.16 82.35 74.07 63.13 50.70 34.74 63.48
NO YRS 64 64 64 64 63 63 63 64 64 64 64 64 63