COVINGTON FILTER PLANT, VIRGINIA

Monthly Average Temperature (Degrees Fahrenheit)

(442044)

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
1960 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 56.72 h 46.12 29.74 37.93
1961 30.66 41.39 49.13 49.58 59.15 69.13 73.08 73.73 70.32 57.34 49.13 36.55 54.93
1962 35.03 41.11 43.40 51.65 67.95 70.08 72.06 d 72.26 64.23 57.71 44.05 31.60 54.26
1963 30.61 30.62 48.40 55.47 61.92 68.53 72.15 71.39 64.40 57.23 46.03 27.85 52.88
1964 34.40 33.48 45.15 55.85 64.81 71.03 73.47 71.16 64.87 51.63 47.93 38.74 54.38
1965 35.98 36.70 43.05 55.47 66.81 67.70 72.66 71.95 68.37 53.34 46.40 40.13 54.88
1966 30.02 35.00 46.18 51.73 63.34 68.90 74.52 71.69 63.53 54.10 46.58 36.31 53.49
1967 39.06 34.45 48.05 57.82 59.74 69.77 72.19 71.27 62.32 55.40 a 42.32 39.16 54.30
1968 29.39 30.76 48.31 56.25 60.77 71.17 74.44 74.58 66.12 56.68 46.30 34.02 54.06
1969 32.10 35.66 39.68 57.15 64.52 71.67 75.55 71.85 65.28 55.60 43.20 33.50 53.81
1970 30.00 36.34 43.44 56.77 65.40 70.47 73.52 72.60 70.27 57.63 45.09 a 39.16 55.06
1971 32.34 38.11 43.11 53.05 60.10 72.57 72.31 71.40 69.92 62.42 45.25 46.24 55.57
1972 38.71 34.84 46.45 55.25 60.84 66.41 a 72.85 71.85 68.22 53.45 44.85 43.10 54.74
1973 ----- z 37.36 52.16 54.20 61.13 72.40 73.89 73.95 69.63 57.40 48.77 37.98 58.08
1974 45.45 a 39.39 50.84 56.12 a 63.35 66.90 72.81 72.02 63.70 52.35 46.18 37.74 55.57
1975 38.60 40.96 43.31 52.73 66.27 70.80 73.55 74.68 65.90 59.74 49.47 38.60 56.22
1976 33.08 45.03 51.00 55.33 61.18 c 70.10 72.00 70.10 63.90 51.11 38.12 32.24 53.60
1977 22.24 35.14 50.95 ----- z 65.47 68.35 75.53 73.89 68.15 d 53.29 48.82 35.81 54.33
1978 27.11 28.79 43.63 56.28 63.48 b 70.72 74.08 76.08 69.79 f 54.68 48.03 38.77 52.88
1979 31.65 30.02 47.28 b 54.52 b 63.39 66.82 72.06 72.56 66.87 55.06 49.23 b 39.95 54.12
1980 36.71 b 33.93 a 44.11 d 55.92 64.42 68.30 75.50 74.67 a 70.40 55.31 45.13 39.13 55.29
1981 30.39 d 38.35 d 41.97 59.95 a 61.84 73.73 b 75.40 72.97 67.33 55.32 45.28 34.73 54.77
1982 28.98 k 39.27 46.60 51.85 66.63 68.82 74.56 71.19 64.95 57.13 47.10 41.37 57.22
1983 ----- z 37.38 46.68 52.07 61.27 69.95 75.32 75.48 67.33 57.44 46.50 34.29 56.70
1984 31.69 41.69 42.39 53.57 61.44 ----- z 72.29 73.31 63.13 63.24 42.58 43.82 53.56
1985 29.32 37.30 47.65 58.10 64.98 69.38 73.19 71.77 65.67 59.76 54.23 b 34.44 55.48
1986 33.37 39.59 46.34 58.05 65.40 72.90 77.47 71.37 ----- z ----- z ----- z ----- z 58.06
1987 ----- z ----- z ----- z 52.78 67.40 73.50 77.68 77.32 68.38 53.03 48.88 42.05 62.34
1988 30.74 38.03 46.90 55.28 63.89 71.58 76.82 76.60 ----- z 51.15 47.50 38.00 54.23
1989 41.21 39.22 a 48.08 54.60 61.48 73.53 76.05 74.44 68.32 58.85 47.05 28.39 55.94
1990 42.24 45.91 51.24 55.60 65.24 71.58 75.81 75.02 67.97 58.74 50.07 42.10 58.46
1991 37.85 40.71 47.71 56.57 69.82 71.40 76.08 72.61 66.80 55.69 44.57 40.50 56.69
1992 37.89 ----- z 46.31 54.62 61.77 69.07 75.77 71.90 68.65 55.34 46.78 37.24 56.85
1993 41.02 36.32 43.06 55.85 65.11 71.87 78.15 75.19 68.75 55.65 47.13 ----- z 58.01
1994 29.68 ----- z 45.77 59.93 60.00 73.75 75.74 71.77 64.47 55.19 49.92 39.61 56.89
1995 37.00 35.77 48.27 54.77 63.26 69.98 74.77 75.47 64.10 57.58 41.70 32.53 54.60
1996 31.81 36.03 41.61 56.55 65.92 72.63 73.44 73.32 65.90 57.48 39.47 40.34 54.54
1997 33.24 40.61 48.44 49.38 56.95 68.95 74.92 70.81 65.15 54.58 40.02 35.89 53.24
1998 36.74 39.62 42.06 54.02 65.66 70.73 73.40 71.76 68.47 55.32 44.88 40.71 55.28
1999 36.66 38.21 40.23 56.12 61.85 70.15 75.68 72.94 64.85 54.60 50.80 38.27 55.03
2000 32.58 40.71 48.19 53.03 65.31 72.57 71.45 71.55 65.30 56.93 a 42.40 28.89 54.08
2001 32.61 40.11 39.66 55.62 62.39 70.13 71.85 74.90 65.13 53.95 49.87 42.42 54.89
2002 38.26 39.20 43.56 56.75 61.00 72.67 75.52 74.58 70.33 57.92 44.02 35.45 55.77
2003 30.74 33.88 48.29 54.73 61.87 67.37 73.76 76.00 66.80 54.42 50.93 36.11 54.58
2004 31.87 35.74 46.94 54.40 68.39 69.88 74.03 71.27 68.13 58.58 49.50 36.47 55.43
2005 37.60 38.57 41.00 53.90 58.35 70.93 76.06 75.39 68.98 58.11 46.72 33.48 54.93
2006 40.77 35.64 44.21 57.57 59.37 69.17 74.19 74.66 64.12 53.50 47.48 41.13 55.15
2007 37.85 28.50 48.03 51.77 64.31 70.95 71.84 78.27 68.98 62.19 45.17 40.98 55.74
2008 33.90 38.24 45.26 56.47 59.69 72.33 72.68 71.00 68.33 54.23 42.53 38.48 54.43
2009 31.92 36.91 45.77 53.83 63.81 71.67 69.98 74.45 66.52 53.97 49.40 35.11 54.45
2010 30.63 30.64 45.92 56.80 65.42 74.62 76.08 75.27 68.03 56.66 45.08 28.69 54.49
2011 31.45 38.95 43.93 a 56.79 a 64.00 70.86 a 76.63 73.82 67.15 54.40 47.40 40.89 55.52
2012 37.10 40.16 53.29 54.52 66.64 t ----- z ----- z ----- z ----- z ----- z ----- z ----- z 46.26
Period of Record Statistics
MEAN 34.19 37.15 45.94 55.04 63.29 70.57 74.21 73.34 66.76 56.05 46.31 37.17 54.89
S.D. 4.44 3.80 3.25 2.25 2.77 1.95 1.82 1.90 2.19 2.70 3.13 4.25 1.00
SKEW 0.15 -0.34 0.06 -0.31 0.03 -0.11 0.04 0.49 -0.07 0.57 -0.32 -0.43 1.20
MAX 45.45 45.91 53.29 59.95 69.82 74.62 78.15 78.27 70.40 63.24 54.23 46.24 58.46
MIN 22.24 28.50 39.66 49.38 56.95 66.41 69.98 70.10 62.32 51.11 38.12 27.85 52.88
NO YRS 48 49 51 51 51 50 51 51 48 50 51 50 39