Lake Superior Region Weather Statistics
 ° F ° C
  LAKE SUPERIOR CLIMATE INFORMATION
Average High Temperature (°F)
City 
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Duluth 
16
22
32
48
62
71
76
74
64
53
35
22
Grand Marais
17
24
35
51
66
74
79
77
66
54
35
22
Thunder Bay
17
20
31
44
56
67
74
71
62
50
34
22
Marathon
17
21
33
44
53
60
64
64
57
48
35
23
Wawa
15
21
30
42
57
64
69
68
59
48
33
23
Sault Ste. Marie
22
24
33
47
62
70
76
74
64
54
39
27
Marquette
21
24
34
47
62
71
76
73
64
52
36
25
Hancock-Houghton
20
22
32
46
61
70
76
73
63
52
37
25
Ashland
22
27
38
52
65
75
81
78
69
58
40
26
Bayfield
21
26
37
50
63
72
78
75
66
55
39
25
Average Low Temperature (°F)
City 
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Duluth 
-1
3
15
29
40
48
54
53
45
35
21
6
Grand Marais
-5
0
13
28
40
49
54
52
44
33
18
3
Thunder Bay
-4
-2
10
26
37
47
52
49
44
34
19
5
Marathon
-2
3
12
28
35
41
48
50
42
35
24
6
Wawa
-4
1
12
24
37
42
50
50
42
33
23
5
Sault Ste. Marie
5
6
15
29
38
46
52
52
45
37
26
13
Marquette
4
4
14
27
39
48
54
52
44
35
23
11
Hancock-Houghton
8
8
17
30
40
49
56
54
47
38
26
14
Ashland
0
3
16
28
38
48
55
53
45
35
23
8
Bayfield
2
4
16
29
39
48
55
54
46
36
24
10
Average Precipitation (Inches)
City 
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Duluth 
1.2
0.8
1.8
2.4
3.2
4.1
4.0
3.9
3.6
2.4
1.9
1.3
Grand Marais 
0.9
0.7
1.2
1.9
2.7
4.1
3.8
3.6
3.2
2.2
1.5
0.9
Thunder Bay
0.9
0.8
1.0
1.5
2.1
2.8
3.6
2.8
3.4
2.5
1.5
1.0
Marathon
2.7
1.9
2.3
2.2
2.6
3.2
2.9
3.2
3.6
3.0
2.6
2.4
Wawa
2.1
1.9
2.8
2.3
2.6
3.5
3.9
4.0
4.7
4.7
3.9
3.2
Sault Ste. Marie
2.3
1.6
2.1
2.5
2.6
3.2
2.9
3.3
3.8
3.1
3.4
2.7
Marquette
2.1
1.7
2.8
2.7
3.1
3.4
3.0
3.4
4.0
3.7
3.1
2.5
Hancock-Houghton
3.8
2.3
2.3
1.9
2.6
2.9
2.8
2.9
3.3
2.7
2.8
3.6
Ashland
1.1
0.8
1.8
2.3
3.3
3.3
3.5
4.2
3.8
2.5
2.2
1.4
Bayfield
1.6
0.9
2.2
2.1
3.3
3.5
3.5
4.2
4.1
2.9
2.3
1.8

LAKE SUPERIOR HISTORY AND OTHER INFORMATION