RICHMOND WSO AIRPORT, VIRGINIA

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(447201)

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 ----- z ----- z ----- z ----- z ----- z 9999.00
1949 35.90 35.79 36.74 44.33 54.06 64.80 71.19 67.45 56.83 52.32 36.93 31.23 48.97
1950 38.87 30.86 32.65 42.27 54.71 62.27 67.19 65.00 59.30 50.45 35.47 26.90 47.16
1951 30.10 29.75 36.52 44.00 52.23 63.53 67.81 66.06 58.80 51.42 33.96 b 27.48 h 48.56
1952 32.74 32.34 35.10 47.03 53.77 65.40 68.87 66.45 58.27 42.58 38.57 29.94 47.59
1953 33.48 32.57 37.94 45.43 60.35 64.33 67.94 65.61 58.00 47.77 35.30 31.94 48.39
1954 27.65 32.68 35.00 48.17 51.61 62.60 66.10 66.19 61.03 50.00 36.03 28.16 47.10
1955 25.97 27.39 38.87 48.70 54.97 58.87 71.32 70.29 62.07 47.65 34.23 24.94 47.10
1956 27.16 33.28 34.71 43.33 52.27 a 63.17 67.48 66.35 58.03 51.87 37.37 38.52 47.79
1957 25.94 34.07 36.68 48.97 56.65 66.50 66.52 64.23 63.30 44.68 40.07 33.55 48.43
1958 24.58 24.68 34.03 46.53 55.10 60.77 70.84 67.16 57.30 48.55 40.10 22.94 46.05
1959 26.39 30.43 35.06 46.83 57.65 63.30 69.68 69.42 60.70 51.90 36.40 31.55 48.28
1960 30.45 29.31 26.16 47.97 53.23 61.13 65.16 67.94 58.77 46.32 36.93 22.71 45.51
1961 22.06 31.46 39.61 40.73 50.97 61.40 67.23 66.81 62.33 44.32 39.33 27.81 46.17
1962 26.58 30.43 34.45 44.10 57.81 63.43 64.19 62.90 54.67 47.26 36.73 26.81 45.78
1963 26.39 22.96 38.61 45.73 51.74 61.37 63.84 63.29 54.40 43.10 37.77 22.55 44.31
1964 25.77 26.62 35.26 43.87 53.68 59.97 66.29 63.97 55.77 40.81 37.40 32.71 45.18
1965 24.58 27.79 33.13 42.80 57.35 60.47 66.13 64.97 59.97 44.10 36.07 29.61 45.58
1966 22.03 29.18 35.94 41.97 51.87 59.63 64.10 65.00 56.43 41.77 36.63 28.19 44.40
1967 29.61 23.68 33.74 45.43 48.16 59.30 66.32 65.52 53.40 43.06 30.67 31.13 44.17
1968 22.65 21.79 38.26 45.23 52.77 63.13 69.26 67.87 57.77 49.32 40.03 26.87 46.25
1969 24.77 29.82 30.42 44.53 52.52 65.53 69.19 64.87 57.53 46.58 35.57 26.97 45.69
1970 19.26 24.11 32.10 45.70 56.52 63.23 68.00 66.45 62.03 52.23 38.90 30.06 46.55
1971 24.90 29.11 33.45 39.27 51.68 65.17 66.74 65.65 62.13 56.94 37.13 37.19 47.45
1972 30.87 27.97 35.94 42.90 54.61 60.03 68.23 65.32 60.30 45.26 38.53 37.29 47.27
1973 26.03 27.46 42.61 46.53 53.65 66.30 67.26 67.39 60.93 47.16 37.37 30.26 47.75
1974 36.61 28.93 38.03 45.83 55.19 59.67 64.87 66.61 56.73 40.74 36.23 30.84 46.69
1975 29.74 30.96 34.35 40.63 55.77 62.73 66.29 67.68 59.93 50.68 39.80 28.55 47.26
1976 23.48 34.14 39.00 43.77 52.35 63.53 64.81 63.16 55.57 42.87 29.43 24.84 44.75
1977 15.29 26.36 40.32 46.13 54.94 59.90 69.06 68.42 63.37 45.52 43.30 29.74 46.86
1978 23.71 19.43 34.45 44.20 54.55 62.20 66.45 70.06 61.93 45.29 42.13 30.61 46.25
1979 26.94 18.89 37.39 46.40 56.39 59.43 68.03 68.13 63.17 46.45 41.53 30.77 46.96
1980 30.16 25.52 36.58 49.20 56.42 60.40 68.52 69.32 63.67 45.97 34.63 28.35 47.39
1981 20.19 30.21 32.00 47.93 52.87 67.53 69.87 65.35 57.53 44.13 37.90 29.77 46.28
1982 23.03 33.54 38.32 43.60 58.84 65.30 69.97 65.90 59.87 48.65 40.63 37.74 48.78
1983 30.16 30.43 40.97 45.80 54.84 65.37 67.19 65.55 56.60 48.26 37.57 27.87 47.55
1984 24.13 34.62 33.52 45.47 53.68 65.43 66.55 66.13 55.33 55.84 34.03 36.55 47.61
1985 23.29 29.71 37.55 47.20 55.84 62.87 67.87 67.39 59.40 52.94 47.70 27.35 48.26
1986 25.84 32.07 37.19 46.30 54.48 64.10 70.26 65.16 60.50 50.87 40.47 31.48 48.23
1987 25.84 26.46 34.87 43.97 55.48 64.50 70.19 67.58 62.77 39.06 39.07 33.71 46.96
1988 22.84 28.07 35.74 44.20 53.68 60.37 68.84 69.58 58.13 40.87 38.33 28.13 45.73
1989 31.19 29.82 37.90 44.10 52.74 66.10 68.39 67.13 61.60 48.55 38.07 22.23 47.32
1990 35.32 36.54 41.26 45.60 55.00 62.43 69.29 67.65 58.57 50.90 39.07 35.81 49.79
1991 30.68 32.00 40.06 48.77 60.06 63.77 71.32 68.35 59.80 46.97 38.17 33.23 49.43
1992 30.61 32.00 35.65 45.27 50.71 59.83 69.35 64.29 60.70 44.35 40.87 32.19 47.15
1993 32.45 27.18 35.42 43.83 55.65 63.50 70.87 67.48 62.03 46.84 39.60 30.06 47.91
1994 24.87 29.11 37.39 49.63 51.00 66.53 71.32 65.03 57.17 45.77 41.23 35.65 47.89
1995 32.52 28.89 37.87 44.70 54.77 64.20 69.39 68.00 58.60 49.03 34.07 26.00 47.34
1996 25.52 28.72 32.74 45.87 55.23 64.30 67.45 65.48 61.03 48.32 33.57 35.16 46.95
1997 28.10 34.21 37.94 42.27 50.29 60.20 67.32 64.94 59.10 47.84 37.30 30.71 46.68
1998 34.94 35.29 38.97 47.10 57.90 64.40 68.10 67.00 62.87 48.23 37.20 34.97 49.75
1999 31.48 30.86 34.32 45.73 53.39 62.67 69.84 67.77 59.97 46.10 41.30 32.23 47.97
2000 26.53 a 32.03 39.35 45.83 56.71 66.27 65.68 66.03 58.43 46.90 35.10 23.68 46.88
2001 26.74 31.39 34.61 45.55 a 53.93 a 65.07 64.00 68.19 57.23 45.77 42.10 35.39 47.50
2002 31.94 30.14 37.74 47.90 53.52 63.50 69.00 68.29 62.27 52.19 37.90 29.58 48.66
2003 25.87 28.32 37.87 46.03 54.81 63.53 68.81 69.97 61.03 47.16 42.67 29.68 47.98
2004 24.90 28.69 38.97 48.03 62.45 65.73 69.87 67.29 63.27 51.35 42.67 32.39 49.63
2005 30.84 31.82 35.29 46.37 52.68 66.23 72.48 71.23 63.67 52.03 41.10 29.13 49.41
2006 34.68 29.46 37.65 47.47 53.29 65.13 71.48 70.39 61.10 49.16 43.97 35.97 49.98
2007 33.90 25.54 39.13 45.23 56.45 65.03 67.48 69.87 60.83 55.71 38.40 35.55 49.43
2008 30.13 32.59 38.81 49.17 53.77 66.50 68.52 66.42 62.70 47.26 39.73 34.74 49.19
2009 26.00 30.43 36.61 47.07 57.87 65.97 66.61 70.32 60.27 49.06 43.83 30.77 48.73
2010 26.90 26.89 41.03 48.50 59.68 70.03 70.71 69.94 62.53 49.65 38.83 25.13 49.15
2011 25.87 33.11 38.42 49.90 58.23 67.17 71.13 68.35 64.47 49.35 41.93 35.52 50.29
2012 31.84 33.41 46.65 46.83 a 59.67 v ----- z ----- z ----- z ----- z ----- z ----- z ----- z 39.68
Period of Record Statistics
MEAN 27.81 29.58 36.64 45.62 54.69 63.45 68.16 66.95 59.74 47.68 38.33 30.51 47.41
S.D. 4.52 3.68 3.12 2.27 2.66 2.47 2.10 1.96 2.63 3.78 3.21 4.10 1.46
SKEW 0.08 -0.72 -0.11 -0.39 0.44 -0.01 -0.17 0.12 -0.32 0.07 -0.01 -0.08 -0.15
MAX 38.87 36.54 46.65 49.90 62.45 70.03 72.48 71.23 64.47 56.94 47.70 38.52 50.29
MIN 15.29 18.89 26.16 39.27 48.16 58.87 63.84 62.90 53.40 39.06 29.43 22.23 44.17
NO YRS 64 64 64 64 63 63 63 63 63 63 63 62 62