World Resorts

USA

Duluth Weather

Duluth 14 Days Forecast

19.09
sat

Day

57°F

SW 14 mph

Precip.
26%

Night

54°F

SW 8 mph

Precip.
17%

20.09
sun

Day

55°F

SW 22 mph

Precip.
29%

Night

50°F

W 15 mph

Precip.
20%

21.09
mon

Day

55°F

SW 17 mph

Precip.
9%

Night

50°F

W 14 mph

Precip.
12%

22.09
tue

Day

55°F

SW 12 mph

Precip.
2%

Night

50°F

W 6 mph

Precip.
11%

23.09
wed

Day

54°F

SW 6 mph

Precip.
5%

Night

52°F

SW 6 mph

Precip.
11%

24.09
thu

Day

57°F

W 2 mph

Precip.
4%

Night

54°F

SW 2 mph

Precip.
11%

25.09
fri

Day

61°F

NW 2 mph

Precip.
4%

Night

55°F

SW 4 mph

Precip.
13%

26.09
sat

Day

63°F

N 12 mph

Precip.
9%

Night

64°F

NE 7 mph

Precip.
18%

27.09
sun

Day

61°F

N 6 mph

Precip.
23%

Night

54°F

W 9 mph

Precip.
79%

28.09
mon

Day

55°F

W 7 mph

Precip.
5%

Night

52°F

SW 4 mph

Precip.
10%

29.09
tue

Day

54°F

SW 17 mph

Precip.
17%

Night

48°F

W 12 mph

Precip.
11%

30.09
wed

Day

52°F

SW 15 mph

Precip.
6%

Night

48°F

SW 12 mph

Precip.
20%

01.10
thu

Day

54°F

SW 14 mph

Precip.
9%

Night

52°F

SW 9 mph

Precip.
10%

02.10
fri

Day

55°F

SW 7 mph

Precip.
3%

Night

52°F

SW 8 mph

Precip.
8%

sea water
temperature

Duluth

monthly
weather

Duluth

current
weather

Duluth

7 days
forecast

Duluth

January
February
March
April

May
June
July
August

September
October
November
December

Show year:

2026

2025

2024

The average sea water temperature in September of 2026 was 64.2°F. The highest and lowest sea temperatures during the month were 67.8°F and 60.4°F.

Show year:

2025

2024

2023

The average sea water temperature in October of 2025 was 56.9°F. The highest and lowest sea temperatures during the month were 62.4°F and 50.0°F.