WILMINGTON WSO ARPT, DELAWARE

Monthly Average Maximum 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 83.77 78.07 64.03 58.97 44.61 65.89
1949 46.84 47.75 53.13 62.33 74.13 83.60 88.35 85.68 74.60 69.84 54.60 46.87 65.64
1950 52.58 40.89 47.58 59.33 69.61 81.17 84.45 82.97 71.90 68.23 55.80 41.00 62.96
1951 44.00 44.29 51.06 63.10 73.74 80.30 86.19 84.39 78.20 68.65 51.03 46.45 64.28
1952 44.97 45.66 48.84 63.97 71.39 84.00 a 89.52 83.68 79.07 65.10 54.37 44.48 64.59
1953 44.87 47.43 52.32 61.77 74.52 82.87 88.42 86.06 79.67 69.90 55.70 47.90 65.95
1954 40.03 50.32 50.74 67.47 70.84 83.63 88.55 82.35 78.52 a 69.71 52.67 42.58 64.78
1955 38.61 44.04 53.23 65.00 76.42 78.63 91.55 86.97 77.03 69.10 52.77 38.06 64.28
1956 38.55 45.55 47.03 60.30 71.87 82.27 82.32 83.10 74.00 66.35 54.53 49.55 62.95
1957 36.26 45.07 50.35 64.80 74.16 83.97 87.84 84.26 77.50 63.00 55.10 45.35 63.97
1958 37.68 34.29 45.97 63.00 70.42 77.66 a 84.74 81.61 76.80 65.00 55.03 37.29 60.79
1959 40.77 42.18 51.55 65.27 76.84 82.83 84.19 84.68 80.10 68.26 53.93 46.03 64.72
1960 41.71 43.83 40.81 68.37 70.81 80.97 82.94 83.39 76.63 65.42 56.73 38.06 62.47
1961 34.48 42.79 51.16 58.73 68.97 80.57 84.81 82.81 82.17 68.13 55.43 41.23 62.61
1962 39.68 38.50 51.16 62.67 74.97 80.83 82.97 82.58 73.67 67.00 51.20 38.35 61.96
1963 36.39 36.29 53.74 64.33 72.19 81.73 87.29 81.42 73.47 71.13 57.00 35.90 62.57
1964 42.26 39.17 53.61 58.57 76.06 83.23 84.45 81.45 78.10 64.23 59.23 44.90 63.77
1965 37.55 43.43 46.97 58.77 77.06 80.73 83.71 83.06 78.87 64.81 54.30 46.81 63.01
1966 36.52 40.21 53.13 56.97 70.39 83.93 88.29 85.16 74.57 64.68 56.37 42.74 62.75
1967 44.16 38.25 48.00 62.53 64.94 81.67 82.48 80.52 75.47 65.74 49.40 44.65 61.48
1968 36.19 40.21 54.68 65.53 69.10 81.53 85.65 86.90 80.83 68.42 54.80 41.58 63.79
1969 37.84 39.68 48.32 65.60 74.68 81.90 82.97 84.35 77.57 67.58 53.77 39.39 62.80
1970 32.32 42.46 47.00 62.03 76.00 81.23 84.77 86.32 82.37 69.32 56.83 43.19 63.66
1971 35.39 43.39 49.55 63.47 70.29 82.80 85.97 83.26 78.33 70.68 54.43 50.39 64.00
1972 44.13 41.28 50.32 61.03 72.94 77.40 85.10 85.06 79.07 63.65 53.13 47.81 63.41
1973 44.42 44.39 58.23 63.83 70.29 83.90 86.74 86.06 80.33 70.48 58.27 45.84 66.07
1974 43.71 41.82 53.71 67.27 72.77 79.00 86.90 84.94 75.67 64.55 56.00 47.26 64.47
1975 45.45 43.71 49.45 57.30 74.90 80.00 84.26 85.16 74.23 69.68 61.33 44.61 64.17
1976 35.81 51.83 56.16 66.30 69.74 81.93 83.16 83.29 77.27 61.29 50.00 39.23 63.00
1977 28.94 42.71 57.55 65.90 75.03 78.60 86.35 83.97 77.53 62.81 53.33 41.32 62.84
1978 34.71 31.57 45.94 61.30 69.39 80.97 82.39 85.19 76.93 66.23 55.57 46.94 61.43
1979 39.55 29.71 56.84 60.43 73.23 77.50 84.23 83.84 77.33 64.35 59.40 47.13 62.80
1980 40.00 39.17 49.32 64.70 75.68 80.07 87.77 87.94 82.10 64.71 52.50 41.94 63.82
1981 33.94 47.86 50.00 65.73 73.45 81.73 86.32 82.97 76.43 63.87 54.50 41.65 63.20
1982 32.55 42.50 51.19 62.50 75.84 78.87 86.94 82.45 76.90 66.90 57.73 50.10 63.71
1983 43.26 44.61 54.52 62.87 71.84 82.57 88.90 87.42 81.27 66.58 56.90 40.77 65.12
1984 33.61 47.07 43.97 60.70 71.23 84.27 84.16 84.13 74.97 70.26 53.97 51.03 63.28
1985 35.94 46.57 57.87 70.67 76.71 80.47 86.55 82.94 79.27 67.74 58.23 41.55 65.37
1986 41.03 37.46 55.19 61.97 76.81 82.67 86.26 81.55 76.67 66.48 52.93 44.94 63.66
1987 38.10 39.86 55.35 61.50 73.29 83.43 88.84 83.55 76.87 63.06 57.10 46.65 63.97
1988 35.90 43.07 54.61 59.60 72.26 83.03 89.19 86.03 75.27 61.42 56.70 44.16 63.44
1989 44.00 41.61 51.19 62.30 71.65 82.53 84.23 82.29 77.67 68.77 53.63 32.48 62.70
1990 49.10 51.43 56.19 63.90 70.68 82.13 86.13 83.23 76.27 70.52 59.17 50.65 66.61
1991 43.10 49.14 53.87 64.53 80.74 84.73 85.77 86.10 77.20 68.10 55.73 47.97 66.42
1992 43.94 45.69 49.71 61.93 71.00 79.67 85.00 81.48 75.93 63.77 54.93 45.65 63.23
1993 45.10 39.96 46.87 63.13 75.87 83.10 88.71 87.61 78.20 65.35 57.93 44.13 64.66
1994 33.61 40.07 50.19 69.73 71.42 86.10 88.55 82.32 76.90 65.35 59.30 48.71 64.36
1995 43.58 38.57 55.94 62.63 72.71 81.43 88.45 87.35 78.17 70.39 49.80 37.94 63.91
1996 37.39 40.97 47.55 62.73 69.48 82.23 81.97 82.55 76.33 64.71 48.53 45.84 61.69
1997 39.26 47.50 52.87 60.43 68.94 80.20 86.61 82.16 75.63 66.32 51.00 45.35 63.02
1998 47.32 48.50 53.10 64.40 74.65 79.37 84.77 85.29 81.07 66.74 57.37 49.39 66.00
1999 42.57 a 45.89 51.00 62.93 73.87 a 80.83 91.00 85.13 76.33 64.13 58.33 46.71 64.89
2000 39.48 44.86 57.97 61.27 73.29 81.07 80.97 80.81 74.13 67.42 52.77 37.45 62.62
2001 38.90 44.71 47.77 63.73 72.58 82.37 82.03 86.35 75.73 68.45 62.47 50.47 a 64.63
2002 45.94 49.57 53.90 66.37 72.06 81.53 87.48 87.94 79.47 63.26 52.17 41.61 65.11
2003 35.55 35.32 52.68 60.83 65.94 76.87 84.16 84.45 76.87 64.06 58.17 43.55 61.54
2004 31.84 43.07 53.42 63.17 77.19 79.20 82.61 81.26 77.77 63.32 55.97 45.10 62.83
2005 38.87 43.50 47.26 64.83 68.23 81.83 85.48 86.94 83.33 66.06 58.67 41.06 63.84
2006 48.61 43.25 54.03 66.67 73.84 79.97 87.03 86.16 74.00 64.58 57.53 50.84 65.54
2007 46.32 35.14 54.06 60.17 76.42 82.60 86.42 85.32 81.87 73.48 54.23 44.39 65.04
2008 43.61 46.34 54.61 64.57 70.97 85.33 88.19 83.42 78.80 66.35 52.77 46.58 65.13
2009 35.42 46.14 51.29 64.53 73.03 78.87 83.32 85.00 74.90 63.97 57.60 42.55 63.05
2010 39.87 37.04 57.42 67.50 75.35 87.03 89.65 86.16 81.63 67.26 55.87 38.61 65.28
2011 35.26 45.50 51.52 65.50 76.00 84.20 91.19 84.00 77.33 65.35 59.80 50.74 65.53
2012 45.87 48.90 61.39 65.03 a 70.22 v ----- z ----- z ----- z ----- z ----- z ----- z ----- z 55.30
Period of Record Statistics
MEAN 40.08 42.87 51.81 63.29 72.87 81.61 85.97 84.23 77.52 66.50 55.40 44.19 63.83
S.D. 4.90 4.57 3.86 2.82 2.95 2.13 2.50 1.91 2.47 2.64 2.93 4.18 1.31
SKEW 0.12 -0.49 -0.17 0.12 -0.13 0.03 0.14 0.16 0.29 0.27 -0.10 -0.39 0.11
MAX 52.58 51.83 61.39 70.67 80.74 87.03 91.55 87.94 83.33 73.48 62.47 51.03 66.61
MIN 28.94 29.71 40.81 56.97 64.94 76.87 80.97 80.52 71.90 61.29 48.53 32.48 60.79
NO YRS 64 64 64 64 63 63 63 64 64 64 64 64 63