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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Dewey Beach, DE
Content continues below
May
Average Temperature
High
20°
Feels 20
Low
13°
Feels 13
Average Precipitation
12 Days
Rain amount
74.5mm
Snow amount
0cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
18°
22
14°
23
15°
24
20°
25
18°
26
18°
27
22°
28
18°
29
18°
30
16°
31
18°
Forecast
Thursday, May 21, 2026
Day
18°
Feels 18
Wind
31 km/h NE
Gust
47 km/h
Humidity
68%
P.O.P
30%
Night
14°
Feels 11
Wind
32 km/h NE
Gust
48 km/h
Humidity
88%
P.O.P
90%
Rain
~5 mm
Historical Averages
May 21
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.