Lake Superior Region Weather Statistics
 
Average High Temperature (°C)
City 
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Duluth 
-8
-5
0
8
16
21
24
23
17
11
1
-5
Grand Marais
-8
-4
1
9
17
22
25
24
18
11
1
-5
Thunder Bay
-8
-6
0
6
13
19
23
21
16
10
1
-5
Marathon
-8
-6
-1
6
12
16
18
18
14
9
2
-5
Wawa
-9
-6
-1
6
14
18
21
20
15
9
1
-5
Sault Ste. Marie
-5
-4
0
8
16
21
24
23
17
12
3
-2
Marquette
-6
-4
1
8
16
21
24
22
17
11
2
-3
Hancock-Houghton
-6
-5
0
7
15
21
24
22
17
11
2
-4
Ashland
-5
-2
3
11
18
23
27
25
20
14
4
-3
Bayfield
-6
-3
2
10
17
22
25
24
18
12
4
-3
Average Low Temperature (°C)
City 
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Duluth 
-18
-16
-9
-1
4
8
12
11
7
1
-6
-14
Grand Marais
-19
-17
-10
-2
4
8
12
11
7
1
-7
-16
Thunder Bay
-20
-18
-12
-3
2
8
11
9
6
1
-7
-15
Marathon
-19
-16
-11
-2
2
5
9
10
6
2
-4
-14
Wawa
-20
-17
-11
-4
3
6
10
10
6
1
-5
-15
Sault Ste. Marie
-15
-14
-9
-1
3
7
11
11
7
2
-3
-10
Marquette
-15
-15
-10
-2
3
8
12
11
6
1
-5
-11
Hancock-Houghton
-13
-13
-8
-1
4
9
13
12
8
3
-3
-10
Ashland
-17
-15
-8
-2
3
8
12
11
7
1
-4
-13
Bayfield
-16
-15
-8
-1
3
8
13
12
7
2
-4
-12
Average Precipitation (cm)
City 
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Duluth (77)
3
2
4
6
8
10
10
9
9
6
4
3
Grand Marais (67)
2
2
3
5
7
10
10
9
8
6
3
2
Thunder Bay (60)
2
1
2
3
5
7
9
7
8
6
3
2
Marathon (83)
7
5
6
6
7
8
7
8
9
8
7
6
Wawa (101)
5
5
7
6
7
9
10
10
12
12
10
8
Sault Ste.Marie(84)
5
4
5
6
6
8
7
8
9
7
8
6
Marquette (90)
5
4
7
6
7
8
7
8
10
9
7
6
Hancock-Houghton(86)
9
5
5
4
6
7
7
7
8
6
7
9
Ashland (76)
2
1
4
5
8
8
8
10
9
6
5
3
Bayfield (82)
3
2
5
5
8
8
8
10
10
7
5
4