Wilmington, Delaware May 2015 Average Temperature Rankings
1991-2020
Degrees Fahrenheit
1
68.1
63.5
4.6
79
3
1967
2004
2014
2004
top-tenth
2
61.1
58.6
2.5
74
6
1967
2019
2014
2011
top-tenth
2010
3
53.3
53.5
-0.2
51
27
1950,1967
2012
2014
2012
normal
1957
4
46.2
49.0
-2.8
12
66
1934,1978
2012
2003
2014
bottom-third
1963
5
43.1
45.9
-2.8
18
60
1978
2023
2014
2012
bottom-third
6
42.6
44.6
-2.0
28
50
1978
2012
2014
2012
normal
7
42.7
44.9
-2.2
22
55
1978
2012
2014
2012
bottom-third
1959,1964,1969
8
44.7
46.4
-1.7
27
49
1978
2012
2014
2012
normal
1962,1964,2001
9
47.3
48.9
-1.6
29
47
1978
2012
2014
2012
normal
1969,1993
10
49.9
51.6
-1.7
28
48
1934
2012,2023
2014
2012
normal
11
52.2
53.9
-1.7
23
53
1963
2012
2014
2014
bottom-third
1989,2014
12
53.9
55.5
-1.6
25
51
1963,1978
2012
2014
2014
bottom-third
1971,1981,2005,2014
18
50.0
51.8
-1.8
17
56
1979
2017,2023
1997
2012
bottom-third
1951,1980,1989,1997
24
53.9
55.4
-1.5
21
50
1978
2017,2023
1994
2012
bottom-third
36
-99
55.3
-99
-99
-99
1979
2023
normal
48
-99
55.3
-99
-99
-99
1964,1966,1970
2023
normal
60
-99
55.2
-99
-99
-99
1967
2023
normal