Total Cloudy and Foggy Days at US Cities in July





The table below gives averages for how many days in July 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 July with cloud or fog
City Cloud Fog
Atlanta, Georgia 12 16
Austin, Texas 6 5
Baltimore, Maryland 10 15
Birmingham, Alabama 12 18
Boston, Massachusetts 12 12
Buffalo, New York 11 14
Charlotte, North Carolina 12 18
Chicago, Illinois 10 8
Cincinnati, Ohio 12 17
Cleveland, Ohio 11 13
Columbus, Ohio 11 17
Dallas, Texas 6 3
Denver, Colorado 6 2
Detroit, Michigan 10 13
Hartford, Connecticut 13 16
Houston, Texas 8 12
Indianapolis, Indiana 10 17
City Cloud Fog
Jacksonville, Florida 12 13
Kansas City, Missouri 7 7
Las Vegas, Nevada 3 0
Los Angeles, California 5 6
Louisville, Kentucky 10 13
Memphis, Tennessee 9 8
Miami, Florida 11 1
Milwaukee, Wisconsin 10 11
Minneapolis, Minnesota 9 5
Nashville, Tennessee 10 16
New Orleans, Louisiana 12 15
New York, New York 10 13
Oklahoma City, Oklahoma 7 3
Orlando, Florida 11 9
Philadelphia, Pennsylvania 12 17
Phoenix, Arizona 4 0
Pittsburgh, Pennsylvania 13 19
City Cloud Fog
Portland, Oregon 10 4
Providence, Rhode Island 12 17
Raleigh, North Carolina 12 22
Richmond, Virginia 12 20
Rochester, New York 11 12
Sacramento, California 1 0
Salt Lake City, Utah 4 0
San Antonio, Texas 7 5
San Diego, California 5 6
San Francisco, California 3 4
Seattle, Washington 11 7
St. Louis, Missouri 10 11
Tampa, Florida 12 7
Virginia Beach, Virginia 12 13
Washington, DC 12 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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