Humid cities · South Carolina
How humid is Columbia in summer?
Across June, July and August, the dew point in Columbia averages about 68.5°F, which is muggy on the usual dew point scale.
July is the muggiest month, with the dew point averaging about 69.8°F. On NOAA’s hour by hour normals, about 2,281 hours, about 26% of the year, average a dew point of 65°F or more. That makes it the 18th most humid summer of the 124 US cities we track.
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Summer humidity at a glance
| Dew point, June to August | 68.5°F |
|---|---|
| Muggiest month | July, 69.8°F |
| Hours a year at a 65°F dew point or more | 2,281 (26%) |
| How summer feels | muggy |
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
- Memphis, Tennessee: about 68.6°F
- Birmingham, Alabama: about 68.3°F
- Norfolk, Virginia: about 68°F
More about the weather here
Source: NOAA U.S. Climate Normals, hourly, 1991 to 2020, station USW00013883. Average dew points, not the stickiest days.