Duluth Water Temperature

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Duluth is a city close to Lake Superior. August is the month with the hottest water temperature at 73°F / 22.8°C. The coldest month is January with an ø water temperature of 32°F / -0°C. April is the month with the lowest precipitation of 0in / 1.1mm and August with the highest precipitation in a year with 2.1in / 53.3mm. 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. June, July, August, September would be the best time to visit. Warm-summer humid continental climate would be the climate here.

Duluth Summary

Description	Value
Current water temperature	/
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

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Duluth water temperature by month

°F

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

°C

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

The hottest water temperature typically reached in August with around 73°F / 22.8°C. The coldest in January with an average water temperature of 32°F / -0°C.

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Duluth weather today & 14-day weather forecast

7-day weather forecast
+9-day forecast

7-day weather forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Jul. 18	Overcast clouds	64 °F 53°F	18 °C 12°C	1mph (2km/h) east-southeast	0in (1mm) 40 %	74%
Jul. 19	Light rain	71 °F 57°F	22 °C 14°C	1mph (2km/h) east-southeast	0in (3mm) 50 %	75%
Jul. 20	Scattered clouds	70 °F 58°F	21 °C 15°C	1mph (2km/h) southeast	0in (0mm) 0 %	67%
Jul. 21	Light shower rain	68 °F 60°F	20 °C 15°C	2mph (3km/h) east	0in (3mm) 60 %	74%
Jul. 22	Thunderstorm with rain	72 °F 63°F	22 °C 17°C	2mph (3km/h) southeast	0in (6mm) 65 %	83%
Jul. 23	Thunderstorm with rain	73 °F 65°F	23 °C 18°C	2mph (3km/h) east-southeast	0in (5mm) 65 %	85%
Jul. 24	Scattered clouds	78 °F 63°F	25 °C 17°C	2mph (4km/h) west-northwest	0in (0mm) 0 %	81%

+9-day forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Jul. 25	Scattered clouds	76 °F 62°F	25 °C 17°C	2mph (3km/h) west-southwest	0in (0mm) 0 %	77%
Jul. 26	Scattered clouds	76 °F 61°F	25 °C 16°C	2mph (3km/h) southwest	0in (0mm) 0 %	71%
Jul. 27	Scattered clouds	76 °F 61°F	25 °C 16°C	2mph (3km/h) west-southwest	0in (0mm) 0 %	75%
Jul. 28	Few clouds	81 °F 61°F	27 °C 16°C	2mph (3km/h) west	0in (0mm) 0 %	71%
Jul. 29	Few clouds	84 °F 60°F	29 °C 15°C	1mph (2km/h) southeast	0in (0mm) 20 %	85%
Jul. 30	Light rain	75 °F 61°F	24 °C 16°C	2mph (3km/h) southwest	0in (3mm) 45 %	81%
Jul. 31	Few clouds	78 °F 56°F	26 °C 13°C	2mph (3km/h) southwest	0in (0mm) 0 %	77%
Aug. 01	Broken clouds	77 °F 59°F	25 °C 15°C	2mph (4km/h) southwest	0in (0mm) 20 %	76%
Aug. 02	Light rain	70 °F 62°F	21 °C 17°C	2mph (3km/h) southeast	0in (2mm) 40 %	93%

Duluth weather by month / climate table

°F

	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%

°C

	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 hottest 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 temperature. April is the month with the lowest precipitation of 0in / 1.1mm and August with the maximum 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

Lake Superior