WILMINGTON WSO ARPT, DELAWARE

Monthly Average Temperature (Degrees Fahrenheit)

(079595)

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 73.60 66.72 54.21 49.43 36.19 56.03
1949 39.16 38.55 43.16 51.97 62.94 72.90 78.66 75.11 64.23 60.35 44.50 37.47 55.75
1950 42.69 33.61 37.60 48.25 60.05 69.60 73.73 a 72.50 63.37 57.61 44.97 32.40 53.03
1951 34.19 34.80 41.50 51.58 61.92 70.42 75.84 73.73 66.93 59.10 41.52 37.56 54.09
1952 36.97 37.53 40.52 54.58 61.05 73.03 a 78.40 74.23 67.38 52.35 45.43 37.40 54.91
1953 37.53 38.36 44.42 52.27 64.98 72.12 76.98 74.47 68.18 57.95 45.15 38.63 55.92
1954 31.24 40.36 41.45 55.60 60.56 72.03 76.21 72.89 68.55 a 59.61 43.77 35.10 54.78
1955 31.48 34.12 43.47 54.82 64.74 68.72 81.21 77.90 67.22 58.10 43.22 29.84 54.57
1956 31.82 37.50 38.61 49.87 59.87 71.65 73.37 73.42 64.53 56.77 45.15 41.27 53.65
1957 28.60 37.39 42.11 54.12 62.87 74.15 75.94 73.11 68.63 53.24 46.53 37.82 54.54
1958 30.73 27.25 38.92 53.38 60.71 67.48 a 76.52 72.95 65.82 55.42 45.83 28.53 51.96
1959 30.89 32.98 41.08 54.25 65.56 71.95 75.42 76.00 70.33 59.44 44.65 37.95 55.04
1960 35.06 35.84 32.79 56.35 60.56 70.93 73.11 74.84 67.97 55.31 45.93 28.34 53.09
1961 25.60 34.57 42.55 48.87 58.90 70.42 75.60 74.00 72.48 56.92 46.65 33.23 53.31
1962 31.15 31.23 41.19 52.18 64.11 71.53 72.53 72.82 63.53 56.66 42.43 30.23 52.47
1963 28.32 27.46 44.06 52.58 60.27 70.78 76.23 71.68 63.67 58.39 48.02 28.34 52.48
1964 33.15 31.60 43.13 49.35 64.27 72.13 75.73 71.45 67.17 52.74 47.63 37.24 53.80
1965 28.98 33.62 38.39 49.23 65.95 70.20 74.50 73.26 69.37 53.56 45.00 37.66 53.31
1966 29.24 31.84 42.94 47.88 60.23 72.48 77.15 74.73 65.30 53.53 46.52 34.76 53.05
1967 36.15 29.34 39.35 51.52 55.35 71.20 74.39 72.76 65.02 54.74 40.72 36.79 52.28
1968 27.94 30.50 44.56 54.07 59.61 71.35 76.69 77.08 69.68 58.98 47.00 34.16 54.30
1969 30.81 33.52 39.55 55.08 64.15 73.38 75.63 75.35 68.13 56.00 44.53 32.68 54.07
1970 24.45 33.43 38.87 51.85 64.79 71.68 76.55 76.69 72.08 60.35 48.52 35.90 54.60
1971 27.35 35.46 40.74 51.03 60.35 73.37 75.89 73.95 71.12 62.85 45.73 42.08 55.00
1972 36.11 32.52 41.24 49.95 62.47 68.55 76.84 75.48 69.58 53.53 45.20 41.56 54.42
1973 35.63 35.48 49.37 54.68 61.40 75.80 78.10 78.02 70.38 59.87 49.05 37.66 57.12
1974 36.18 33.12 44.27 55.48 62.37 70.35 76.66 76.10 66.42 53.16 46.57 38.82 54.96
1975 37.45 35.93 40.52 47.47 65.23 71.45 75.61 76.24 65.38 59.94 51.03 36.16 55.20
1976 27.68 41.17 46.45 54.63 59.85 72.38 74.19 73.66 66.82 52.48 40.35 30.97 53.39
1977 20.84 33.25 47.24 54.37 63.89 68.85 76.39 75.32 69.30 53.40 46.63 33.34 53.57
1978 27.16 22.71 37.55 50.32 60.23 70.55 73.37 77.10 66.67 54.10 46.73 37.24 51.98
1979 31.35 22.07 45.37 50.63 63.74 67.83 75.26 75.02 68.23 54.95 49.57 38.06 53.51
1980 32.39 29.90 40.02 54.58 64.87 68.88 77.69 78.24 71.32 54.77 43.27 33.11 54.09
1981 25.44 37.89 40.21 55.03 62.44 72.28 77.05 73.47 66.90 52.92 45.23 34.24 53.59
1982 24.16 34.20 41.81 50.58 65.02 69.82 77.34 71.97 67.35 55.98 47.48 41.32 53.92
1983 35.13 35.32 45.89 53.08 61.02 71.80 77.60 76.95 69.23 56.82 46.70 32.10 55.14
1984 24.79 38.57 35.58 50.68 61.15 73.73 75.11 75.23 63.65 61.13 43.30 42.13 53.75
1985 27.53 37.39 47.08 57.97 65.85 70.55 76.60 74.40 69.10 58.29 51.02 32.87 55.72
1986 32.16 31.54 43.60 52.33 65.69 72.02 77.02 72.48 67.47 57.18 44.13 37.34 54.41
1987 31.42 31.86 44.53 52.25 63.03 73.48 79.13 74.27 68.27 51.63 47.37 38.65 54.66
1988 27.37 34.72 44.18 50.77 62.85 71.55 79.35 77.31 65.72 50.95 46.68 35.02 53.87
1989 36.02 34.25 42.03 51.53 62.13 74.32 75.87 74.34 68.38 57.60 44.63 24.98 53.84
1990 40.52 41.09 45.98 53.72 61.48 72.12 77.44 74.55 66.62 60.00 48.33 40.98 56.90
1991 34.29 39.70 44.87 54.70 69.10 73.62 77.29 76.68 67.15 57.56 46.83 39.42 56.77
1992 35.19 37.19 41.44 51.98 60.63 69.57 76.27 72.16 67.32 53.18 47.15 38.34 54.20
1993 37.56 30.95 38.98 52.75 65.23 72.73 79.35 77.76 68.72 55.65 47.40 36.37 55.29
1994 26.26 31.54 41.77 58.42 59.95 75.80 79.81 73.15 67.15 53.82 49.65 39.95 54.77
1995 36.60 30.27 45.39 51.53 62.19 72.07 78.71 77.08 68.25 59.35 41.33 31.31 54.51
1996 29.90 33.29 38.42 52.62 60.06 72.95 74.11 73.98 67.68 55.03 40.05 39.16 53.11
1997 31.73 38.88 43.13 50.25 58.61 69.60 75.90 72.74 65.47 55.63 43.58 37.53 53.59
1998 39.82 40.93 44.63 54.18 65.27 70.42 75.08 75.52 70.83 57.03 46.88 40.97 56.80
1999 34.40 a 36.82 41.68 52.68 62.92 a 71.57 79.98 75.79 68.13 53.82 49.35 38.76 55.49
2000 31.47 36.57 47.23 51.83 63.79 71.95 72.87 72.68 64.95 56.34 44.12 30.05 53.65
2001 31.55 36.18 39.74 53.27 62.66 72.95 72.65 77.29 65.62 56.68 50.77 41.87 a 55.10
2002 37.76 39.38 44.31 55.65 61.39 71.78 77.52 77.77 69.30 55.44 43.58 34.27 55.68
2003 28.71 28.66 42.74 51.03 58.11 68.78 75.61 76.44 68.50 54.16 49.27 35.82 53.15
2004 25.39 34.00 44.63 53.67 68.19 70.03 74.73 73.10 68.77 54.61 47.00 36.65 54.23
2005 31.73 35.07 38.60 53.83 57.50 72.93 76.92 77.94 71.80 57.68 47.85 33.66 54.63
2006 39.73 34.86 44.11 55.57 62.68 71.30 78.10 76.73 65.50 54.85 49.62 41.58 56.22
2007 38.26 28.12 43.56 50.55 64.79 73.08 76.56 76.35 70.48 63.47 45.38 37.61 55.69
2008 35.68 36.88 44.48 54.67 60.15 75.08 78.06 73.15 69.63 55.60 45.28 38.48 55.60
2009 28.48 36.50 42.27 54.50 63.42 70.48 73.45 76.68 66.62 55.31 49.68 35.39 54.40
2010 32.35 30.91 47.89 56.28 65.55 76.68 79.65 76.97 70.80 57.15 46.43 31.56 56.02
2011 28.44 35.91 42.27 55.93 66.23 74.02 80.77 74.95 69.77 56.10 49.57 41.31 56.27
2012 37.16 39.95 51.39 53.48 a 62.22 v ----- z ----- z ----- z ----- z ----- z ----- z ----- z 45.49
Period of Record Statistics
MEAN 32.11 34.32 42.46 52.81 62.49 71.70 76.45 74.90 67.76 56.27 46.14 36.07 54.43
S.D. 4.72 4.06 3.28 2.38 2.63 1.92 2.01 1.86 2.21 2.73 2.60 3.94 1.22
SKEW -0.01 -0.68 -0.07 -0.08 0.00 0.17 0.09 0.13 -0.02 0.43 -0.26 -0.55 0.09
MAX 42.69 41.17 51.39 58.42 69.10 76.68 81.21 78.24 72.48 63.47 51.03 42.13 57.12
MIN 20.84 22.07 32.79 47.47 55.35 67.48 72.53 71.45 63.37 50.95 40.05 24.98 51.96
NO YRS 64 64 64 64 63 63 63 64 64 64 64 64 63