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The tables below display average monthly climate and weather indicators in Wilmington Delaware.
Temperature by: Fahrenheit / Centigrade
| Wilmington Temperature |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Avg. Temperature |
7.2 |
8.5 |
12.4 |
16.8 |
21.2 |
24.7 |
26.7 |
26.3 |
24.1 |
18.5 |
13.9 |
9.2 |
17.4 |
| Avg. Max Temperature |
12.9 |
14.5 |
18.7 |
23.3 |
27.1 |
29.7 |
31.4 |
30.9 |
29.6 |
24.9 |
20.6 |
15.2 |
23.2 |
| Avg. Min Temperature |
1.3 |
2.4 |
6.2 |
10.3 |
15.2 |
19.7 |
22.1 |
21.7 |
18.5 |
12.1 |
7.1 |
3.1 |
11.6 |
| Days with Max Temp of 32 C or Higher |
0.0 |
0.0 |
0.0 |
1.0 |
2.0 |
8.0 |
16.0 |
12.0 |
5.0 |
< 0.5 |
0.0 |
0.0 |
45.0 |
| Days with Min Temp Below Freezing |
13.0 |
10.0 |
4.0 |
3.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
1.0 |
3.0 |
10.0 |
41.0 |
| | |
| Wilmington Heating and Cooling |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Heating Degree Days |
631 |
496 |
338 |
115 |
10.0 |
0.0 |
0.0 |
0.0 |
0.0 |
102 |
259 |
519 |
2470 |
| Cooling Degree Days |
8.0 |
0.0 |
10.0 |
34.0 |
168 |
345 |
468 |
446 |
309 |
111 |
19.0 |
8.0 |
1926 |
| | |
| Wilmington Precipitation |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Precipitation (inches) |
3.9 |
3.7 |
3.9 |
2.9 |
4.4 |
6.0 |
8.1 |
6.9 |
5.0 |
2.7 |
3.1 |
3.6 |
54.3 |
| Days with Precipitation 0.01 inch or More |
11.0 |
10.0 |
10.0 |
8.0 |
9.0 |
10.0 |
13.0 |
12.0 |
10.0 |
7.0 |
8.0 |
9.0 |
117 |
| Monthly Snowfall (inches) |
0.4 |
0.5 |
0.4 |
0.2 |
< 0.05 |
< 0.05 |
< 0.05 |
0.0 |
0.0 |
0.0 |
0.9 |
0.6 |
1.9 |
| | |
| Other Wilmington Weather Indicators |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Average Wind Speed |
9.0 |
9.6 |
10.0 |
10.1 |
9.1 |
8.4 |
7.9 |
7.3 |
7.8 |
7.9 |
8.1 |
8.4 |
8.6 |
| Clear Days |
10.0 |
9.0 |
10.0 |
11.0 |
8.0 |
7.0 |
6.0 |
7.0 |
8.0 |
12.0 |
12.0 |
10.0 |
111 |
| Partly Cloudy Days |
6.0 |
6.0 |
8.0 |
8.0 |
11.0 |
11.0 |
12.0 |
12.0 |
10.0 |
7.0 |
7.0 |
7.0 |
104 |
| Cloudy Days |
15.0 |
13.0 |
14.0 |
11.0 |
12.0 |
12.0 |
13.0 |
12.0 |
12.0 |
11.0 |
11.0 |
14.0 |
150 |
| Percent of Possible Sunshine |
56.0 |
59.0 |
64.0 |
71.0 |
67.0 |
66.0 |
64.0 |
62.0 |
61.0 |
64.0 |
63.0 |
59.0 |
63.0 |
| Avg. Relative Humidity |
58.0 |
67.5 |
67.5 |
66.5 |
66.0 |
70.0 |
73.0 |
76.5 |
77.0 |
75.0 |
70.5 |
67.5 |
70.5 |
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