S
M
T
W
T
F
S
26
54°
46°
27
59°
46°
28
55°
46°
29
63°
45°
30
64°
48°
1
54°
50°
2
55°
50°
3
59°
46°
4
57°
45°
5
55°
46°
6
52°
43°
7
55°
41°
8
57°
50°
9
57°
45°
10
55°
41°
11
50°
43°
12
55°
43°
13
54°
46°
14
54°
46°
15
53°
45°
16
53°
44°
17
55°
46°
18
54°
46°
19
55°
50°
20
57°
52°
21
55°
52°
22
57°
54°
23
57°
50°
24
61°
52°
25
73°
50°
26
73°
57°
27
70°
57°
28
63°
55°
29
63°
52°
30
N/A
31
61°
53°
1
58°
54°
2
60°
52°
3
58°
51°
4
58°
50°
5
57°
50°
6
59°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Port William
Port William's May 2026 forecast shows daily high temperatures ranging from 57° to 61°, with overnight lows between 50° and 54°. The average high for May is 59° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Port William. See also: June | July | August.
