S
M
T
W
T
F
S
31
49°
38°
1
49°
40°
2
48°
40°
3
49°
39°
4
49°
44°
5
54°
44°
6
55°
43°
7
55°
44°
8
54°
44°
9
55°
43°
10
55°
44°
11
54°
44°
12
55°
43°
13
55°
44°
14
54°
45°
15
55°
45°
16
54°
43°
17
55°
44°
18
53°
44°
19
52°
43°
20
53°
44°
21
54°
45°
22
55°
45°
23
56°
44°
24
55°
46°
25
54°
46°
26
56°
45°
27
56°
40°
28
55°
46°
29
57°
47°
30
57°
47°
1
56°
46°
2
57°
47°
3
57°
48°
4
56°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Port William
Port William's June 2026 forecast shows daily high temperatures ranging from 48° to 57°, with overnight lows between 38° and 48°. The average high for June is 54° with an average low of 44°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Port William. See also: July | August | September.