Humid cities · Maine
How humid is Portland, Maine in summer?
Portland right now
44°FOvercast skies
- Today44°F / 37°FClouds
- Tomorrow47°F / 36°FClouds
- Monday46°F / 34°FClear skies
Get a job. It's dull out.
Live from OpenWeatherMap. Alerts from the National Weather Service.
Across June, July and August, the dew point in Portland, Maine averages about 57.9°F, which is a little sticky on the usual dew point scale.
July is the muggiest month, with the dew point averaging about 60.3°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 38th 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 36°F, which is dry.
Portland, Maine averages a summer dew point of about 58°F. Sea air, the cool kind, mostly.
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 | 57.9°F |
|---|---|
| Muggiest month | July, 60.3°F |
| Hours a year at a 65°F dew point or more | none |
| How summer feels | a little sticky |
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
- Burlington, Vermont: about 57.6°F
- Concord, New Hampshire: about 57.6°F
- Binghamton, New York: about 57.3°F
More about the weather here
Source: NOAA U.S. Climate Normals, hourly, 1991 to 2020, station USW00014764. Average dew points, not the stickiest days.