STERLING R & D CENTER, VIRGINIA

Monthly Average Temperature (Degrees Fahrenheit)

(448084)

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
1977 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 68.70 53.24 47.25 32.03 50.31
1978 26.56 24.80 38.11 51.43 60.37 69.98 72.40 75.45 67.22 52.98 45.82 37.21 51.86
1979 30.03 22.42 b 44.55 51.62 62.31 67.25 72.82 73.10 67.21 a 53.87 49.12 38.13 52.70
1980 31.66 29.72 39.66 53.60 63.66 68.03 75.48 75.40 70.17 53.52 41.97 33.39 53.02
1981 26.39 36.29 39.76 56.35 60.02 71.95 73.58 69.98 64.87 51.35 44.97 32.19 52.31
1982 ----- z 34.43 40.98 49.85 64.08 68.58 74.27 69.63 65.23 54.90 47.73 41.02 55.52
1983 32.71 32.80 44.50 49.73 60.24 70.17 74.94 76.23 66.55 54.90 45.10 31.10 53.25
1984 25.90 39.17 37.29 50.53 61.08 71.33 73.24 74.02 63.13 60.89 42.63 42.69 53.49
1985 27.56 34.54 44.44 55.85 63.16 68.22 74.58 72.61 66.53 57.26 51.02 32.32 54.01
1986 31.61 31.50 42.87 53.32 62.92 72.00 a 77.85 71.48 67.13 57.03 42.00 35.85 53.80
1987 30.16 31.59 43.55 51.18 62.77 71.95 77.50 74.71 67.62 49.79 46.57 38.11 53.79
1988 25.71 34.34 43.24 51.80 62.37 69.55 76.65 76.27 64.12 a 49.85 45.37 34.60 52.82
1989 35.74 34.88 42.19 51.45 61.05 72.93 74.94 72.24 66.50 55.90 43.98 23.61 52.95
1990 39.81 41.88 46.84 54.07 ----- z 71.10 75.52 72.26 66.00 58.60 47.62 39.85 55.78
1991 33.19 38.41 46.02 55.50 68.26 70.82 76.35 75.10 66.60 55.81 44.73 38.26 55.75
1992 34.16 36.98 40.52 51.83 58.76 67.00 74.85 70.06 66.08 52.26 44.98 35.24 52.73
1993 36.15 32.07 38.69 51.83 63.95 70.37 77.61 75.16 67.00 52.85 43.52 33.52 53.56
1994 25.05 32.04 40.97 57.25 58.24 73.67 76.35 71.03 63.95 52.32 48.93 40.02 53.32
1995 36.39 30.27 45.95 52.33 61.56 70.68 76.87 75.68 66.02 57.87 39.80 31.81 53.77
1996 29.79 33.24 37.97 53.57 60.45 72.38 73.06 72.31 66.92 55.40 40.38 38.03 52.79
1997 32.18 39.89 44.69 49.97 58.55 68.02 74.23 71.73 64.62 53.27 40.82 36.18 52.84
1998 38.71 38.70 42.76 52.92 64.90 69.83 74.37 74.58 70.27 54.79 43.18 39.60 55.38
1999 33.68 a 35.07 39.03 51.57 60.32 69.12 76.34 73.31 65.80 51.34 49.08 36.53 53.43
2000 30.48 37.02 46.06 51.82 62.63 70.95 70.53 71.89 64.12 55.34 40.30 b 26.37 52.29
2001 29.56 36.25 38.08 52.77 61.40 70.33 70.68 74.84 64.03 53.66 47.75 39.48 53.24
2002 36.77 36.96 42.10 54.80 60.45 71.43 76.21 76.00 66.83 53.40 41.27 31.26 53.96
2003 27.61 29.29 42.42 49.90 59.60 68.60 74.55 75.45 66.20 51.76 48.63 34.10 52.34
2004 26.95 31.48 43.79 53.47 68.53 69.38 74.23 72.58 67.37 53.58 46.62 34.90 53.57
2005 33.37 34.80 38.19 52.95 57.18 71.48 76.35 74.70 f 69.03 58.46 e 45.35 31.13 51.66
2006 38.71 33.52 42.56 55.13 60.00 70.50 76.48 76.19 63.70 52.79 46.27 39.71 54.63
2007 36.63 25.62 43.08 49.70 63.24 72.00 74.34 76.08 68.42 60.85 44.08 35.76 54.15
2008 32.94 35.22 42.35 53.78 58.66 73.02 75.40 71.87 69.20 e 53.92 43.23 36.56 53.85
2009 28.26 36.29 41.92 53.78 62.68 70.93 73.40 77.13 66.83 53.92 48.08 33.45 53.89
2010 31.74 29.57 46.72 f 57.02 65.05 76.70 79.65 76.42 70.52 57.58 44.78 30.16 56.29
2011 28.35 35.75 42.43 a 56.55 65.78 a 74.48 80.52 75.90 68.82 54.65 47.92 39.69 55.90
2012 35.77 39.41 b 52.10 52.52 b 65.00 t ----- z ----- z ----- z ----- z ----- z ----- z ----- z 44.95
Period of Record Statistics
MEAN 31.77 33.89 42.34 52.91 61.95 70.73 75.18 73.84 66.67 54.57 45.17 35.25 53.51
S.D. 4.15 4.32 3.13 2.16 2.68 2.08 2.16 2.16 1.93 2.72 2.90 4.18 0.97
SKEW 0.16 -0.66 0.65 0.36 0.59 0.53 0.14 -0.35 0.19 0.56 -0.12 -0.62 0.72
MAX 39.81 41.88 52.10 57.25 68.53 76.70 80.52 77.13 70.52 60.89 51.02 42.69 55.90
MIN 25.05 22.42 37.29 49.70 57.18 67.00 70.53 69.63 63.13 49.79 39.80 23.61 51.86
NO YRS 34 35 34 35 33 34 34 33 35 35 35 35 30