Duluth Water Temperature

Duluth is a city close to Lake Superior. Warm-summer humid continental climate would be the climate here. August is the month with the highest water temperature at 73°F / 22.8°C. The month with the lowest is January with an average water temperature of 32°F / 0°C. The avg. air temperature is around 69.4°F / 20.8°C, July is the month with the highest temperature. January is the coolest with 12.4°F / -10.9°C average air temperature. April is the month with the min. precipitation of 0in / 1.1mm and August with the max. precipitation in a year with 2.1in / 53.3mm. June, July, August, September would be the best time to visit this place.

Duluth Summary

Description Value
Current water temperature 30.2 °F / -1 °C
Warmest Month Water Temperature: August with 73°F / 22.8°C
Coldest Month Water Temperature: January with 32°F / 0°C
Warmest Month Air Temperature: July with 69.4°F / 20.8°C
Coldest Month Air Temperature: January with 12.4°F / -10.9°C
Wettest Month: August with 2.1in / 53.3mm
Driest Month: April with 0in / 1.1mm
Highest Humidity December with 78.1%
Lowest Humidity September with 70.4%
Best Time to Visit: June, July, August, September
Climate Classification Warm-summer humid continental climate

Duluth water temperature by month

Lake Superior water temperature by month

Max. Water

Temperature (°F)

ø. Water

Temperature (°F)

Min. Water

Temperature (°F)

January

32 32 32

February

32 32 32

March

32 32 32

April

32.5 32 32

May

42.8 36.5 32.5

June

61.7 51.6 43

July

74.1 67.5 59.4

August

74.8 70.5 66.9

September

71.2 63.7 57

October

58.3 50.9 46

November

45.9 42.4 39

December

38.7 34.3 32

Lake Superior water temperature by month

Max. Water

Temperature (°C)

ø. Water

Temperature (°C)

Min. Water

Temperature (°C)

January

0 0 0

February

0 0 0

March

0 0 0

April

0.3 0 0

May

6 2.5 0.3

June

16.5 10.9 6.1

July

23.4 19.7 15.2

August

23.8 21.4 19.4

September

21.8 17.6 13.9

October

14.6 10.5 7.8

November

7.7 5.8 3.9

December

3.7 1.3 0
August is the month with the highest water temperature at 73°F / 22.8°C. The month with the lowest is January with an average water temperature of 32°F / 0°C.

Duluth weather today & 14-day weather forecast

Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Apr. 10
Broken clouds
48 °F
40°F
9 °C
4°C
2mph (4km/h)
west-southwest
0in (0mm)
25 %
81%
Apr. 11
Light rain
46 °F
41°F
8 °C
5°C
3mph (4km/h)
west
0in (8mm)
90 %
87%
Apr. 12
Light rain
43 °F
39°F
6 °C
4°C
1mph (1km/h)
east-southeast
0in (6mm)
85 %
98%
Apr. 13
Light rain
46 °F
39°F
8 °C
4°C
2mph (4km/h)
west-northwest
0in (8mm)
90 %
91%
Apr. 14
Overcast clouds
45 °F
40°F
7 °C
4°C
1mph (2km/h)
east-southeast
0in (2mm)
60 %
94%
Apr. 15
Overcast clouds
43 °F
37°F
6 °C
3°C
1mph (2km/h)
northeast
0in (0mm)
25 %
96%
Apr. 16
Overcast clouds
43 °F
36°F
6 °C
2°C
2mph (3km/h)
east-northeast
0in (0mm)
20 %
93%
Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Apr. 17
Broken clouds
49 °F
36°F
10 °C
2°C
3mph (4km/h)
east-northeast
0in (0mm)
20 %
90%
Apr. 18
Overcast clouds
46 °F
38°F
8 °C
3°C
1mph (1km/h)
southwest
0in (2mm)
65 %
78%
Apr. 19
Overcast clouds
51 °F
34°F
11 °C
1°C
1mph (2km/h)
west-northwest
0in (0mm)
15 %
85%
Apr. 20
Few clouds
38 °F
30°F
3 °C
-1°C
2mph (4km/h)
east-northeast
0in (0mm)
20 %
64%
Apr. 21
Broken clouds
40 °F
32°F
4 °C
-0°C
1mph (1km/h)
east
0in (0mm)
0 %
52%
Apr. 22
Few clouds
59 °F
33°F
15 °C
1°C
1mph (1km/h)
east-southeast
0in (0mm)
0 %
56%
Apr. 23
Few clouds
41 °F
31°F
5 °C
-1°C
2mph (4km/h)
east
0in (0mm)
0 %
71%
Apr. 24
Clear Sky
42 °F
31°F
6 °C
-0°C
2mph (3km/h)
east-northeast
0in (0mm)
0 %
57%
Apr. 25
Few clouds
59 °F
38°F
15 °C
4°C
2mph (3km/h)
southwest
0in (0mm)
0 %
51%

Duluth weather by month / climate table

Max.

Temperature

°F

ø.

Temperature

°F

Min.

Temperature

(°F)

Precip.

(in)

Rainy Days

(d)

Rel. Humidity

(%)

January

23.2 12.4 2.1 0.6 0 75.2%

February

25.7 14.4 4.3 0.5 0 74%

March

41.4 25.7 9.9 0.3 0 74.2%

April

50 36.5 25.5 0 0 71.1%

May

64.6 48.6 37.8 0.9 1 71.1%

June

72.9 60.1 47.3 1.1 2 76.2%

July

78.1 69.4 61.2 1.7 1 72.8%

August

78.1 68.7 61.5 2.1 0 71.9%

September

75.6 61.7 49.1 1.1 0 70.4%

October

60.1 47.8 37.6 0.8 0 70.6%

November

46.2 35.1 23.5 0.8 1 72.5%

December

30.4 20.8 13.5 1.5 0 78.1%

Max.

Temperature

°C

ø.

Temperature

°C

Min.

Temperature

(°C)

Precip.

(mm)

Rainy Days

(d)

Rel. Humidity

(%)

January

-4.9 -10.9 -16.6 15.5 0 75.2%

February

-3.5 -9.8 -15.4 13.8 0 74%

March

5.2 -3.5 -12.3 6.6 0 74.2%

April

10 2.5 -3.6 1.1 0 71.1%

May

18.1 9.2 3.2 23.2 1 71.1%

June

22.7 15.6 8.5 28 2 76.2%

July

25.6 20.8 16.2 43.4 1 72.8%

August

25.6 20.4 16.4 53.3 0 71.9%

September

24.2 16.5 9.5 28.7 0 70.4%

October

15.6 8.8 3.1 19.8 0 70.6%

November

7.9 1.7 -4.7 19.4 1 72.5%

December

-0.9 -6.2 -10.3 37.5 0 78.1%
The warmest avg. temperature is around 69.4°F / 20.8°C, July is the month with the highest temperature. January is the coolest with 12.4°F / -10.9°C average air temperature. April is the month with the min. precipitation of 0in / 1.1mm and August with the max. precipitation in a year with 2.1in / 53.3mm.

Activities & POI in Duluth

Type of Activity List
Marina for Sailing, Boat adventures, fishing Minnesota Slip
Attraction Marshall W Alworth Planetariam, SS William A. Irvin, Enger Tower, Glenshhen Mansion Congdon Estate Grounds
Golf Course Enger Park Golf Course, Ridgeview Country Club