WASHINGTON NATL WSCMO A, VIRGINIA

Monthly Average Minimum 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 66.77 60.00 47.68 42.37 32.35 49.83
1949 34.68 35.21 37.81 45.57 55.71 66.83 72.81 69.68 58.07 55.03 39.17 34.23 50.40
1950 38.90 31.50 32.45 42.33 55.90 64.70 67.97 67.32 59.67 51.52 38.10 28.58 48.25
1951 30.55 29.68 36.68 45.67 54.65 64.53 69.39 68.16 61.10 53.35 35.63 33.39 48.56
1952 33.61 33.62 34.87 47.47 55.03 67.03 71.42 67.68 59.00 44.03 39.93 32.19 48.82
1953 33.32 33.82 39.06 46.60 60.81 65.60 70.00 66.74 59.63 50.10 37.83 32.55 49.67
1954 27.68 33.86 35.32 48.30 53.61 64.30 67.90 66.90 62.87 52.48 37.47 30.06 48.40
1955 28.74 28.50 37.94 48.43 57.68 61.20 73.48 70.90 62.80 49.13 36.10 26.71 48.47
1956 28.48 33.34 34.39 43.93 53.00 64.00 67.45 66.61 58.20 51.55 38.03 36.13 47.93
1957 25.71 34.04 37.94 48.90 57.03 67.40 68.81 66.06 64.13 47.26 41.97 33.94 49.43
1958 28.00 24.79 35.39 47.90 56.00 62.10 70.81 67.39 59.70 50.26 41.67 25.81 47.48
1959 26.03 29.50 35.00 47.57 60.32 66.27 70.48 72.42 64.20 54.55 37.90 34.71 49.91
1960 32.06 31.10 28.23 49.63 54.55 64.93 68.13 70.06 63.33 50.26 38.77 22.65 47.81
1961 22.45 30.64 38.29 42.57 52.71 64.00 69.74 69.71 66.10 48.94 42.87 29.58 48.13
1962 26.58 28.11 35.84 46.57 59.06 65.67 66.39 67.34 b 58.27 51.06 37.07 26.00 47.33
1963 23.55 22.61 38.10 46.63 54.58 64.17 67.68 65.19 56.33 47.97 40.57 23.68 45.92
1964 26.35 28.66 36.45 43.77 56.65 64.87 69.68 65.71 59.30 44.45 39.53 31.68 47.26
1965 25.06 26.36 32.61 42.00 57.39 62.40 68.39 67.52 63.23 46.71 40.10 32.42 47.02
1966 25.10 28.14 36.52 43.63 54.10 64.67 70.74 68.87 59.83 46.19 39.40 30.58 47.31
1967 32.39 24.93 34.71 45.70 49.26 63.60 68.32 67.26 57.30 47.00 36.03 31.58 46.51
1968 22.48 24.62 37.77 46.27 53.32 63.93 70.97 69.81 61.03 51.84 42.00 28.94 47.75
1969 27.06 30.14 33.42 47.30 57.00 67.60 70.81 67.00 60.83 47.55 38.43 29.58 48.06
1970 21.68 27.18 33.06 44.97 57.06 64.93 69.84 69.39 64.73 54.10 41.43 32.10 48.37
1971 24.10 30.61 34.26 42.40 54.13 67.03 69.42 67.35 65.50 57.61 39.67 36.77 49.07
1972 30.81 27.59 36.45 43.43 55.45 61.67 69.84 67.19 62.23 46.68 38.87 36.55 48.06
1973 28.68 28.21 42.58 46.60 53.26 68.23 70.13 71.19 65.43 52.71 41.40 34.77 50.27
1974 35.19 30.11 39.26 46.50 55.32 62.53 69.23 69.68 61.00 45.94 41.70 35.26 49.31
1975 32.55 33.00 36.90 44.67 60.16 68.20 71.29 71.39 61.00 53.29 43.60 32.81 50.74
1976 26.29 35.83 41.13 47.33 54.97 68.17 69.10 67.87 60.90 47.68 33.90 27.10 48.35
1977 17.45 27.86 42.87 48.70 58.90 64.90 71.45 70.16 66.33 50.84 45.87 30.61 49.66
1978 25.45 24.46 36.42 47.33 57.10 66.97 70.61 73.81 65.07 49.71 44.40 34.58 49.66
1979 28.32 21.54 41.32 47.80 59.00 63.50 71.13 70.71 64.73 50.10 45.30 35.35 49.90
1980 31.03 28.48 37.23 50.63 59.97 65.00 73.65 73.55 67.90 51.16 40.50 32.00 50.92
1981 25.48 33.79 38.03 51.87 56.68 70.30 72.58 68.74 62.73 49.26 43.13 31.87 50.37
1982 20.10 30.21 36.81 43.00 59.00 65.10 71.97 66.77 62.03 50.87 42.33 37.97 48.85
1983 31.10 30.04 40.39 44.50 55.35 66.73 71.74 72.03 63.03 52.16 41.07 29.58 49.81
1984 24.84 36.07 33.94 45.67 55.58 66.90 69.06 70.32 59.90 58.16 37.23 37.77 49.62
1985 23.52 29.36 38.48 50.27 59.06 63.90 69.97 68.84 62.13 53.16 47.50 28.23 49.53
1986 27.00 30.00 36.55 46.80 57.19 65.83 72.00 66.68 62.73 52.19 38.93 32.68 49.05
1987 28.19 29.07 37.58 46.17 57.16 66.73 72.87 70.06 64.00 43.87 40.30 34.48 49.21
1988 23.48 28.79 36.90 45.23 56.23 63.77 71.32 71.58 59.93 44.77 41.17 30.45 47.80
1989 32.06 30.46 37.26 45.90 55.32 68.87 70.84 69.35 63.17 50.45 39.40 21.00 48.67
1990 34.84 35.25 40.32 46.27 55.35 65.10 70.81 68.77 61.07 53.00 41.63 35.87 50.69
1991 30.77 33.54 40.29 48.60 62.84 66.80 72.23 70.84 62.03 50.52 40.27 34.19 51.08
1992 30.19 32.69 36.39 45.73 52.68 62.20 71.32 65.48 61.30 47.06 41.37 33.19 48.30
1993 32.55 26.07 34.55 44.77 57.55 65.40 73.71 70.06 62.77 49.16 39.73 31.61 48.99
1994 21.23 27.82 36.16 51.13 52.03 68.70 73.00 67.10 61.07 49.61 43.80 36.71 49.03
1995 32.87 26.25 39.16 45.47 56.29 66.00 72.52 71.84 62.00 52.71 35.53 28.84 49.12
1996 25.45 29.90 34.00 46.70 55.13 67.97 69.71 68.03 62.87 50.55 36.73 36.10 48.59
1997 29.42 36.57 39.45 43.97 51.77 63.60 70.42 67.90 61.07 50.29 39.20 33.84 48.96
1998 36.03 36.61 38.65 47.93 59.13 64.77 69.90 69.84 65.63 51.45 41.13 36.84 51.49
1999 29.90 32.61 35.55 46.63 56.71 65.67 73.06 70.45 62.27 48.39 44.43 34.55 50.02
2000 28.45 33.66 41.68 46.70 58.65 66.53 67.13 67.77 59.70 50.32 38.17 25.03 48.65
2001 28.23 31.79 35.23 47.13 56.74 66.83 66.77 71.10 60.03 48.74 44.60 37.71 49.58
2002 33.55 32.68 37.97 49.63 55.03 66.40 72.13 71.77 64.33 51.68 39.47 30.23 50.41
2003 24.84 27.57 37.16 45.43 55.10 63.57 70.19 71.61 63.10 48.87 44.60 31.81 48.65
2004 23.39 29.66 39.55 48.27 62.90 65.40 71.26 68.81 64.13 50.81 43.17 31.97 49.94
2005 29.19 30.93 34.87 47.43 52.84 67.13 72.61 72.29 65.27 53.06 40.73 29.58 49.66
2006 34.87 30.61 38.29 49.27 55.23 65.73 72.03 71.87 60.67 48.39 43.00 35.58 50.46
2007 33.23 23.64 37.39 44.57 58.03 67.17 69.68 71.13 63.53 57.74 41.83 35.87 50.32
2008 32.39 32.38 39.68 50.23 55.13 68.50 72.03 69.10 66.00 50.00 40.03 32.65 50.68
2009 24.97 30.11 36.74 47.17 57.16 65.80 67.97 71.32 62.50 50.84 44.93 31.45 49.25
2010 27.97 28.29 42.55 50.00 60.32 71.30 73.87 71.87 65.60 52.77 41.70 28.52 51.23
2011 27.58 32.21 37.23 49.00 59.26 69.60 75.39 71.29 64.93 50.19 43.33 37.42 51.45
2012 32.19 36.28 47.16 48.52 a 60.11 v ----- z ----- z ----- z ----- z ----- z ----- z ----- z 41.04
Period of Record Statistics
MEAN 28.44 30.20 37.28 46.67 56.37 65.70 70.59 69.25 62.21 50.31 40.59 32.01 49.11
S.D. 4.35 3.53 2.96 2.27 2.65 2.10 1.93 2.11 2.46 3.06 2.79 3.83 1.23
SKEW -0.04 -0.20 0.28 -0.01 0.16 0.19 -0.01 0.05 -0.05 0.21 0.03 -0.69 -0.17
MAX 38.90 36.61 47.16 51.87 62.90 71.30 75.39 73.81 67.90 58.16 47.50 37.97 51.49
MIN 17.45 21.54 28.23 42.00 49.26 61.20 66.39 65.19 56.33 43.87 33.90 21.00 45.92
NO YRS 64 64 64 64 63 63 63 64 64 64 64 64 63