Total Cloudy and Foggy Days at US Cities in December





The table below gives averages for how many days in December that major cities in the United States have cloud and fog.

The figure for cloud counts the days when cloud covers at least 80 percent of the sky during daylight hours. The number averages measurements for most of the years that each city's main weather station has collected data.

The totals listed for foggy days includes days with mist. This monthly average is based on weather data collected from 1961 to 1990.

Average number of days in December with cloud or fog
City Cloud Fog
Atlanta, Georgia 15 13
Austin, Texas 15 13
Baltimore, Maryland 16 11
Birmingham, Alabama 16 15
Boston, Massachusetts 15 11
Buffalo, New York 24 14
Charlotte, North Carolina 15 13
Chicago, Illinois 19 12
Cincinnati, Ohio 20 14
Cleveland, Ohio 24 13
Columbus, Ohio 21 14
Dallas, Texas 14 11
Denver, Colorado 10 6
Detroit, Michigan 22 14
Hartford, Connecticut 17 13
Houston, Texas 18 17
Indianapolis, Indiana 20 16
City Cloud Fog
Jacksonville, Florida 14 18
Kansas City, Missouri 15 12
Las Vegas, Nevada 10 1
Los Angeles, California 10 11
Louisville, Kentucky 19 12
Memphis, Tennessee 16 11
Miami, Florida 9 6
Milwaukee, Wisconsin 19 13
Minneapolis, Minnesota 18 12
Nashville, Tennessee 17 14
New Orleans, Louisiana 16 18
New York, New York 13 10
Oklahoma City, Oklahoma 13 11
Orlando, Florida 12 16
Philadelphia, Pennsylvania 15 13
Phoenix, Arizona 9 2
Pittsburgh, Pennsylvania 23 15
City Cloud Fog
Portland, Oregon 26 17
Providence, Rhode Island 15 13
Raleigh, North Carolina 14 14
Richmond, Virginia 15 13
Rochester, New York 23 11
Sacramento, California 17 24
Salt Lake City, Utah 18 14
San Antonio, Texas 16 13
San Diego, California 10 11
San Francisco, California 14 19
Seattle, Washington 25 20
St. Louis, Missouri 17 16
Tampa, Florida 11 14
Virginia Beach, Virginia 15 12
Washington, DC 16 11
References

NOAA National Climatic Data Center. Comparative Climatic Data Publication.

World Data Center for Meteorology. Climate of the World.

US City Cloud
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