Duluth Water Temperature

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

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 warmest water temperature at 73°F / 22.8°C. The month with the coldest is January with an average water temperature of 32°F / 0°C.

Duluth Weather Forecast for the next 14 Days

Date Weather High Temp. Low Temp. Rain? Windspeed Precipitation Humidity
Dec 04.
Partly Cloudy
41 °F
5 °C
23 °F
-5 °C
0 %
9.9 mph
16 km/h
0 inch
0 mm
79%
Dec 05.
Overcast
36 °F
2 °C
34 °F
1 °C
0 %
14.9 mph
24 km/h
0 inch
0 mm
84%
Dec 06.
Partly Cloudy
39 °F
4 °C
32 °F
0 °C
0 %
15.5 mph
25 km/h
0 inch
0 mm
59%
Dec 07.
Partly Cloudy
37 °F
3 °C
25 °F
-4 °C
0 %
16.8 mph
27 km/h
0 inch
0 mm
55%
Dec 08.
Partly Cloudy
34 °F
1 °C
27 °F
-3 °C
0 %
6.2 mph
10 km/h
0 inch
0 mm
80%
Dec 09.
Light snow
30 °F
-1 °C
21 °F
-6 °C
0 %
10.6 mph
17 km/h
0 inch
0 mm
77%
Dec 10.
Overcast
34 °F
1 °C
25 °F
-4 °C
0 %
13 mph
21 km/h
0 inch
0.1 mm
76%
Date Weather High Temp. Low Temp. Rain? Windspeed Precipitation Humidity
Dec 11.
Light freezing rain
16 °F
-9 °C
5 °F
-15 °C
78 %
16.8 mph
27 km/h
0 inch
0.2 mm
65%
Dec 12.
Moderate or heavy snow showers
27 °F
-3 °C
16 °F
-9 °C
79 %
18.6 mph
30 km/h
0.2 inch
3.9 mm
77%
Dec 13.
Moderate or heavy snow showers
37 °F
3 °C
30 °F
-1 °C
88 %
16.8 mph
27 km/h
0.1 inch
2 mm
76%
Dec 14.
Partly Cloudy
28 °F
-2 °C
23 °F
-5 °C
0 %
13 mph
21 km/h
0 inch
0 mm
78%
Dec 15.
Partly Cloudy
23 °F
-5 °C
18 °F
-8 °C
0 %
9.9 mph
16 km/h
0 inch
0 mm
71%
Dec 16.
Partly Cloudy
36 °F
2 °C
30 °F
-1 °C
0 %
13 mph
21 km/h
0 inch
0.1 mm
84%
Dec 17.
Overcast
32 °F
0 °C
19 °F
-7 °C
0 %
16.8 mph
27 km/h
0 inch
0 mm
56%

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%
April is the most draught at 0in / 1.1mm and August the month with the most rain around 2.1in / 53.3mm. The avg. temperature is around 69.4°F / 20.8°C, July is the hottest month in a year. January is the coolest with 12.4°F / -10.9°C avg. temperature.

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