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
1	Fresno, California	1	0	0
17	Grand Rapids, Michigan	6	6	6
12	Hartford, Connecticut	4	4	4
0	Honolulu, Hawaii	0	0	0
28	Houston, Texas	7	11	10

Sum­mer	City	June	July	Au­gust
20	Indianapolis, Indiana	7	8	6
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
31	Tucson, Arizona	3	14	14
18	Tulsa, Oklahoma	7	5	6
20	Virginia Beach, Virginia	6	8	7
18	Washington, DC	6	7	5