Total Cloudy and Foggy Days at US Cities in October





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