Humid cities · Minnesota
How humid is Duluth in summer?
Across June, July and August, the dew point in Duluth averages about 54.1°F, which is comfortable on the usual dew point scale.
July is the muggiest month, with the dew point averaging about 56.4°F. On NOAA’s hour by hour normals, no hour of the year averages a dew point of 65°F or more, though a muggy spell can still turn up. That makes it the 31st driest summer air of the 124 US cities we track.
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The highest dew point in the forecast for the next 48 hours is about 32°F, which is dry.
Duluth averages a summer dew point of about 54°F. Lake Superior air: crisp, cool, and not interested in your sweat.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Summer humidity at a glance
| Dew point, June to August | 54.1°F |
|---|---|
| Muggiest month | July, 56.4°F |
| Hours a year at a 65°F dew point or more | none |
| How summer feels | comfortable |
The dew point is the temperature the air would have to cool to for dew to form, so the higher it is, the more water the air holds. Forecasters usually call under 55°F comfortable, 55 to 65°F sticky and 65°F or more muggy; 70°F or more feels tropical.
Cities with about the same summer air
- Astoria, Oregon: about 53.5°F
- Sacramento, California: about 53.2°F
- Bismarck, North Dakota: about 55.3°F
More about the weather here
Source: NOAA U.S. Climate Normals, hourly, 1991 to 2020, station USW00014913. Average dew points, not the stickiest days.