COVINGTON FILTER PLANT, VIRGINIA

Monthly Average Minimum 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 43.04 h 31.40 17.23 24.31
1961 19.13 28.96 36.42 37.90 44.68 55.77 60.29 61.35 58.10 41.74 39.13 27.29 42.56
1962 24.68 29.57 31.35 37.10 53.23 56.97 58.61 58.26 51.70 43.35 32.70 20.81 41.53
1963 17.71 18.36 33.52 39.20 47.42 56.03 57.81 57.90 48.50 37.65 34.40 18.42 38.91
1964 20.52 23.03 31.32 42.00 48.81 56.30 60.03 57.45 50.53 36.58 32.60 28.61 40.65
1965 23.74 23.29 30.35 41.23 52.77 55.77 61.19 59.19 56.27 39.71 33.83 27.90 42.10
1966 20.13 24.82 31.52 40.17 48.77 53.17 60.06 59.61 51.47 40.32 32.93 26.13 40.76
1967 27.19 22.29 33.26 42.30 46.35 55.90 60.13 58.61 47.60 41.23 a 31.13 28.61 41.22
1968 18.87 18.34 32.00 41.60 46.81 56.70 61.52 61.61 51.17 44.13 35.67 24.45 41.07
1969 21.16 26.29 26.94 41.33 48.94 58.97 63.65 59.84 53.63 40.77 31.43 26.23 41.60
1970 19.97 25.79 31.90 42.20 49.45 56.93 59.94 59.84 55.57 44.48 33.59 a 28.81 42.37
1971 22.94 26.00 29.71 33.97 45.35 60.23 59.52 59.00 59.67 52.06 32.90 33.84 42.93
1972 27.32 24.34 33.61 39.80 45.52 53.28 a 60.52 59.58 55.00 41.55 36.07 33.90 42.54
1973 ----- z 24.96 40.81 42.73 47.68 59.53 61.48 61.77 56.73 43.35 35.37 28.81 45.75
1974 35.97 a 26.50 37.48 40.24 a 49.48 55.13 59.52 60.10 50.83 34.03 33.03 27.81 42.51
1975 27.84 30.29 31.48 37.83 53.16 57.83 60.55 60.68 54.93 44.61 34.87 27.45 43.46
1976 22.42 30.55 35.68 36.47 46.71 57.40 58.84 54.81 49.37 38.71 24.77 18.77 39.54
1977 12.19 21.46 36.81 ----- z 50.13 55.07 60.71 61.06 57.58 d 41.48 40.17 25.23 41.99
1978 17.61 18.04 30.87 42.07 50.35 56.57 62.13 63.77 58.10 a 37.61 35.87 25.39 41.53
1979 22.52 19.00 32.17 b 41.10 49.29 53.33 60.13 59.74 56.33 42.06 37.21 a 26.42 41.61
1980 27.84 21.14 30.42 40.60 48.16 52.57 60.52 60.77 56.70 40.16 31.87 25.35 41.34
1981 19.37 a 25.11 28.42 43.17 a 46.39 59.86 a 63.45 58.13 52.97 41.03 30.90 26.03 41.24
1982 17.90 k 26.89 32.03 35.77 49.35 54.83 61.87 57.87 51.47 42.90 33.20 29.42 43.24
1983 ----- z 24.89 34.32 38.30 44.87 55.37 59.58 60.45 50.23 44.16 32.90 23.42 42.59
1984 19.97 27.83 29.77 39.70 46.03 ----- z 59.26 60.06 48.83 49.71 28.27 30.65 40.01
1985 19.68 25.50 32.90 40.13 48.87 53.57 59.74 58.13 49.37 46.29 43.00 23.55 41.73
1986 20.74 30.29 31.16 42.13 49.32 56.77 63.71 59.42 ----- z ----- z ----- z ----- z 44.19
1987 ----- z ----- z ----- z 39.80 52.00 59.97 63.77 62.45 55.57 36.26 34.43 31.52 48.42
1988 18.06 24.83 31.55 39.03 48.68 54.80 61.58 63.06 ----- z 36.61 32.00 25.06 39.57
1989 28.19 26.37 a 33.19 39.13 47.55 61.13 65.13 62.90 57.80 42.65 34.07 16.84 42.91
1990 30.55 31.50 36.48 40.00 51.61 57.27 61.65 62.23 54.60 43.55 32.87 28.74 44.25
1991 26.48 26.75 35.10 41.60 55.87 56.40 62.13 58.58 50.90 37.32 30.00 28.29 42.45
1992 26.48 ----- z 33.13 40.17 48.32 56.57 62.03 59.00 55.23 38.84 35.67 27.32 43.89
1993 29.74 23.43 31.68 39.40 49.55 55.73 62.97 59.84 55.17 40.35 33.60 ----- z 43.77
1994 19.94 ----- z 31.65 41.67 44.06 59.33 62.39 58.55 49.67 37.97 33.57 26.94 42.34
1995 26.81 23.32 31.74 38.67 48.97 57.43 60.55 61.45 49.73 41.35 30.00 21.26 40.94
1996 21.16 24.24 28.03 41.03 50.26 58.97 59.00 59.94 53.03 43.13 27.73 29.19 41.31
1997 22.06 29.68 35.35 34.97 41.32 55.27 60.48 55.61 49.97 39.00 28.20 25.90 39.82
1998 26.94 29.50 29.61 37.47 52.10 56.63 58.19 56.23 49.80 37.77 29.13 28.35 40.98
1999 24.52 24.64 26.32 41.07 43.55 55.20 60.19 56.74 51.00 40.61 35.63 25.97 40.45
2000 19.94 28.48 33.03 40.70 49.55 60.20 60.29 60.74 55.03 40.50 a 30.47 19.06 41.50
2001 21.32 27.89 28.35 40.27 48.97 57.23 59.71 63.10 52.93 37.58 32.23 30.94 41.71
2002 26.32 25.25 28.90 43.00 46.23 58.67 63.94 61.42 57.53 49.10 34.47 26.13 43.41
2003 21.90 26.07 35.19 40.80 52.00 56.03 61.77 64.71 56.10 41.13 37.57 26.90 43.35
2004 21.45 24.62 33.45 41.83 54.58 59.07 62.81 59.32 56.87 48.55 38.73 25.52 43.90
2005 27.55 27.18 30.10 39.27 43.42 58.57 65.29 65.39 55.33 46.26 32.10 24.42 42.91
2006 28.87 24.54 30.58 41.30 44.19 56.40 61.74 62.19 53.93 41.16 33.97 28.06 42.25
2007 28.29 18.21 33.42 39.40 49.00 57.70 58.84 63.97 53.50 48.55 32.33 31.45 42.89
2008 22.97 27.34 31.74 43.33 44.94 57.87 58.90 57.26 56.00 39.77 30.70 28.71 41.63
2009 21.52 23.36 33.52 39.00 51.52 59.13 58.26 63.42 55.63 41.77 38.00 26.06 42.60
2010 22.35 21.82 33.48 38.40 51.84 60.53 62.03 63.42 51.77 41.00 29.80 20.87 41.44
2011 21.52 25.64 31.13 42.62 a 50.42 55.83 63.16 60.84 55.77 41.58 32.70 29.39 42.55
2012 25.87 27.72 38.13 39.93 53.91 t ----- z ----- z ----- z ----- z ----- z ----- z ----- z 32.91
Period of Record Statistics
MEAN 23.34 25.22 32.37 40.06 48.60 56.92 61.01 60.22 53.58 41.64 33.32 26.27 41.86
S.D. 4.30 3.38 2.87 2.08 3.06 2.08 1.80 2.34 3.09 3.74 3.32 3.91 1.15
SKEW 0.32 -0.41 0.46 -0.82 -0.01 0.03 0.42 0.04 -0.11 0.67 0.32 -0.62 -0.27
MAX 35.97 31.50 40.81 43.33 55.87 61.13 65.29 65.39 59.67 52.06 43.00 33.90 44.25
MIN 12.19 18.04 26.32 33.97 41.32 52.57 57.81 54.81 47.60 34.03 24.77 16.84 38.91
NO YRS 48 49 51 51 51 50 51 51 49 50 51 50 40