Average Sunshine for US Cities in September





The tables below pull together figures on the amount of sunshine each of the largest cities in the United States usually has in September.

The % Sun number measures the percentage of time between sunrise and sunset that sunshine reaches the ground. Total Hours is the average number of sunny hours the city normally has this month. Clear Days is the average number of days this month when cloud covers at most 30 percent of the sky during daylight hours.

Hours of sunshine are the means calculated for 1961 to 1990. The other data are averages taken from years of weather watching.

Average sunshine in September
% Sun City Total Hours Clear Days
62 Atlanta, Georgia 228 10
66 Austin, Texas 234 11
60 Baltimore, Maryland 222 11
61 Birmingham, Alabama 224 9
63 Boston, Massachusetts 237 10
57 Buffalo, New York 208 6
64 Charlotte, North Carolina 241 9
59 Chicago, Illinois 227 9
61 Cincinnati, Ohio 234 10
60 Cleveland, Ohio 219 8
61 Columbus, Ohio 212 9
67 Dallas, Texas 246 13
74 Denver, Colorado 272 13
61 Detroit, Michigan 228 8
59 Hartford, Connecticut 224 8
66 Houston, Texas 237 9
65 Indianapolis, Indiana 233 11
% Sun City Total Hours Clear Days
58 Jacksonville, Florida 228 5
66 Kansas City, Missouri 241 12
91 Las Vegas, Nevada 337 22
79 Los Angeles, California 13
64 Louisville, Kentucky 234 10
69 Memphis, Tennessee 251 12
70 Miami, Florida 262 2
59 Milwaukee, Wisconsin 215 9
62 Minneapolis, Minnesota 233 10
62 Nashville, Tennessee 226 11
61 New Orleans, Louisiana 229 10
62 New York, New York 219 11
72 Oklahoma City, Oklahoma 264 13
59 Philadelphia, Pennsylvania 219 10
89 Phoenix, Arizona 329 22
55 Pittsburgh, Pennsylvania 197 7
% Sun City Total Hours Clear Days
62 Portland, Oregon 236 10
62 Providence, Rhode Island 233 9
58 Raleigh, North Carolina 218 10
65 Richmond, Virginia 238 9
59 Rochester, New York 212 7
93 Sacramento, California 348 24
82 Salt Lake City, Utah 301 16
67 San Antonio, Texas 235 9
69 San Diego, California 253 15
72 San Francisco, California 18
62 Seattle, Washington 222 8
63 St. Louis, Missouri 236 11
62 Tampa, Florida 223 5
61 Virginia Beach, Virginia 231 9
61 Washington, DC 225 10
Reference

National Climatic Data Center. Comparative Climatic Data.

World Data Center for Meteorology. Climate of the World.

US City Sunshine
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