S
M
T
W
T
F
S
31
45°
36°
1
46°
37°
2
46°
37°
3
47°
38°
4
48°
40°
5
52°
41°
6
52°
42°
7
52°
42°
8
51°
41°
9
54°
43°
10
53°
42°
11
52°
43°
12
50°
42°
13
51°
42°
14
53°
43°
15
53°
43°
16
50°
42°
17
53°
43°
18
54°
41°
19
52°
45°
20
56°
45°
21
56°
44°
22
55°
46°
23
55°
46°
24
53°
45°
25
53°
46°
26
57°
46°
27
55°
45°
28
57°
46°
29
55°
47°
30
57°
46°
1
58°
48°
2
58°
48°
3
59°
47°
4
59°
47°
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 45° to 59°, with overnight lows between 36° and 48°. The average high for June is 53° with an average low of 43°. 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.