S
M
T
W
T
F
S
31
57°
38°
1
57°
40°
2
58°
38°
3
58°
44°
4
57°
43°
5
59°
44°
6
59°
44°
7
60°
42°
8
60°
41°
9
61°
42°
10
62°
47°
11
61°
47°
12
68°
42°
13
73°
50°
14
74°
49°
15
73°
50°
16
73°
49°
17
72°
50°
18
73°
49°
19
71°
48°
20
70°
50°
21
71°
51°
22
73°
47°
23
73°
45°
24
72°
49°
25
72°
53°
26
75°
51°
27
76°
51°
28
76°
52°
29
75°
49°
30
75°
44°
1
71°
47°
2
71°
52°
3
77°
53°
4
74°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Thunder Bay
Thunder Bay's June 2026 forecast shows daily high temperatures ranging from 57° to 77°, with overnight lows between 38° and 53°. The average high for June is 68° with an average low of 47°. 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 Thunder Bay. See also: July | August | September.
