Total Cloudy and Foggy Days at US Cities in January





The table below gives averages for how many days in January 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 January with cloud or fog
City Cloud Fog
Atlanta, Georgia 16 14
Austin, Texas 16 14
Baltimore, Maryland 15 10
Birmingham, Alabama 18 16
Boston, Massachusetts 15 10
Buffalo, New York 24 13
Charlotte, North Carolina 16 13
Chicago, Illinois 18 10
Cincinnati, Ohio 20 12
Cleveland, Ohio 24 12
Columbus, Ohio 21 12
Dallas, Texas 16 11
Denver, Colorado 11 5
Detroit, Michigan 20 11
Hartford, Connecticut 15 11
Houston, Texas 18 18
Indianapolis, Indiana 19 14
City Cloud Fog
Jacksonville, Florida 14 18
Kansas City, Missouri 14 11
Las Vegas, Nevada 11 1
Los Angeles, California 11 9
Louisville, Kentucky 20 11
Memphis, Tennessee 17 12
Miami, Florida 9 8
Milwaukee, Wisconsin 18 11
Minneapolis, Minnesota 15 10
Nashville, Tennessee 18 14
New Orleans, Louisiana 17 19
New York, New York 14 10
Oklahoma City, Oklahoma 14 10
Orlando, Florida 12 15
Philadelphia, Pennsylvania 16 13
Phoenix, Arizona 10 2
Pittsburgh, Pennsylvania 22 13
City Cloud Fog
Portland, Oregon 24 15
Providence, Rhode Island 15 11
Raleigh, North Carolina 15 13
Richmond, Virginia 16 13
Rochester, New York 22 7
Sacramento, California 19 24
Salt Lake City, Utah 19 14
San Antonio, Texas 16 14
San Diego, California 11 10
San Francisco, California 15 19
Seattle, Washington 24 19
St. Louis, Missouri 17 14
Tampa, Florida 12 16
Virginia Beach, Virginia 16 13
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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