Total Days With Thunderstorms at US Cities in Summer





Information on how often thunderstorms occur during summer at major cities in the United States is given in the table below. The table lists averages for the number of days that each city has thunder and lightning.

The total days with electrical storms during summer is for the months of June, July and August.

The monthly and seasonal averages are based on weather data collected from 1961 to 1990.

Average number of days in summer with thunderstorms
Sum­mer City June July Au­gust
26 Atlanta, Georgia 8 10 8
14 Austin, Texas 5 4 5
16 Baltimore, Maryland 5 6 5
30 Birmingham, Alabama 8 12 9
11 Boston, Massachusetts 4 4 3
18 Buffalo, New York 6 6 7
21 Charlotte, North Carolina 6 9 6
19 Chicago, Illinois 7 6 6
20 Cincinnati, Ohio 7 7 6
17 Cleveland, Ohio 6 6 5
22 Columbus, Ohio 8 8 6
16 Dallas, Texas 6 5 5
29 Denver, Colorado 10 11 9
17 Detroit, Michigan 6 6 5
12 Hartford, Connecticut 4 4 4
28 Houston, Texas 7 11 10
20 Indianapolis, Indiana 7 8 6
Sum­mer City June July Au­gust
41 Jacksonville, Florida 12 16 14
24 Kansas City, Missouri 9 7 8
9 Las Vegas, Nevada 1 4 4
1 Los Angeles, California 0 0 0
22 Louisville, Kentucky 7 8 7
22 Memphis, Tennessee 7 8 6
43 Miami, Florida 12 15 16
18 Milwaukee, Wisconsin 6 6 6
22 Minneapolis, Minnesota 8 8 7
25 Nashville, Tennessee 8 9 7
36 New Orleans, Louisiana 9 14 13
12 New York, New York 4 4 4
20 Oklahoma City, Oklahoma 8 5 6
52 Orlando, Florida 15 19 18
16 Philadelphia, Pennsylvania 6 6 5
15 Phoenix, Arizona 1 6 7
19 Pittsburgh, Pennsylvania 7 6 5
Sum­mer City June July Au­gust
3 Portland, Oregon 1 1 1
12 Providence, Rhode Island 4 4 4
25 Raleigh, North Carolina 7 10 8
21 Richmond, Virginia 7 8 6
17 Rochester, New York 6 6 6
1 Sacramento, California 0 0 0
21 Salt Lake City, Utah 6 7 8
12 San Antonio, Texas 5 3 4
1 San Diego, California 0 0 0
0 San Francisco, California 0 0 0
2 Seattle, Washington 1 1 1
21 St. Louis, Missouri 7 7 6
55 Tampa, Florida 14 20 21
20 Virginia Beach, Virginia 6 8 7
18 Washington, DC 6 7 5
Reference

World Data Center for Meteorology. Climate of the World.

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