Weather in Duluth: July
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Average day temperature: | 74.8°F |
| Average night temperature: | 60.5°F | |
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Sea water temperature: | 63.9°F |
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Number of sunny days: | 13 days |
| Day length: | 14.9 - 15.8 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.4 in. | |
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forecast
| Duluth |
temperature
| Duluth |
Air temperature in July, °F
The highest day temperature during July of 2026 was 91°F. At the same time the lowest night temperature was 53°F. Daily and nightly averages during July were 75.5°F and 64.0°F.
Sea water temperature in Duluth in July, °F
The average sea water temperature in July of 2026 was 64.4°F. The highest and lowest sea temperatures during the month were 73.2°F and 54.5°F.
Mostly all days in July are sunny but cloudy days are also possible.
Precipitation total in July, in.
Precipitation total value in Duluth in July is 1.4 in. Other months of the year show relatively similar values.
The average wind speed value in July is 6.1 mph It makes July lest windy month of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in July is: 9.8.
Best time for vacation in Duluth
Duluth on a weather map
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