S
M
T
W
T
F
S
31
73°
33°
1
68°
37°
2
79°
36°
3
84°
40°
4
61°
51°
5
76°
49°
6
74°
48°
7
70°
42°
8
66°
53°
9
70°
54°
10
64°
52°
11
82°
52°
12
74°
52°
13
65°
53°
14
69°
42°
15
73°
40°
16
62°
45°
17
60°
48°
18
68°
49°
19
68°
46°
20
68°
45°
21
67°
46°
22
64°
48°
23
66°
49°
24
65°
48°
25
68°
49°
26
68°
52°
27
69°
52°
28
69°
50°
29
68°
48°
30
67°
51°
1
66°
52°
2
66°
52°
3
67°
50°
4
67°
52°
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 60° to 69°, with overnight lows between 45° and 52°. The average high for June is 66° with an average low of 49°. 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.
