Average Temperatures for Large US Cities in September

Average temperatures for the month of September in the largest US cities are listed below in degrees Fahrenheit and Celsius.

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Average high temperatures for major US cities during September range from 70 degrees Fahrenheit (21 degrees Celsius) in San Francisco to 100 °F (38 °C) in Phoenix. Temperatures this month are especially comfortable in cities such as New York and Providence where the days are usually around 75 °F (24 °C) and the nights average about 60 °F (16 °C).

Average September temperatures for US cities.
High °F	Low °F	City	High °C	Low °C
84	66	Atlanta, Georgia	29	19
91	70	Austin, Texas	33	21
80	59	Baltimore, Maryland	27	15
86	65	Birmingham, Alabama	30	19
73	58	Boston, Massachusetts	23	15
72	55	Buffalo, New York	22	13
83	63	Charlotte, North Carolina	28	17
77	59	Chicago, Illinois	25	15
79	57	Cincinnati, Ohio	26	14
76	57	Cleveland, Ohio	24	14
78	57	Columbus, Ohio	25	14
90	70	Dallas, Texas	32	21
80	48	Denver, Colorado	27	9
74	56	Detroit, Michigan	24	13
91	63	Fresno, California	33	17
74	53	Grand Rapids, Michigan	23	12
76	54	Hartford, Connecticut	24	12
88	75	Honolulu, Hawaii	31	24
89	73	Houston, Texas	32	23

High °F	Low °F	City	High °C	Low °C
78	57	Indianapolis, Indiana	26	14
88	74	Jacksonville, Florida	31	23
79	58	Kansas City, Missouri	26	14
95	72	Las Vegas, Nevada	35	22
83	64	Los Angeles, California	28	18
82	62	Louisville, Kentucky	28	17
86	66	Memphis, Tennessee	30	19
89	77	Miami, Florida	32	25
74	56	Milwaukee, Wisconsin	23	14
73	54	Minneapolis, Minnesota	23	12
84	62	Nashville, Tennessee	29	17
88	74	New Orleans, Louisiana	31	23
76	62	New York, New York	25	17
84	62	Oklahoma City, Oklahoma	29	16
90	74	Orlando, Florida	32	23
79	61	Philadelphia, Pennsylvania	26	16
100	78	Phoenix, Arizona	38	26
75	55	Pittsburgh, Pennsylvania	24	13

High °F	Low °F	City	High °C	Low °C
76	53	Portland, Oregon	24	12
75	57	Providence, Rhode Island	24	14
83	63	Raleigh, North Carolina	28	17
81	61	Richmond, Virginia	27	16
91	62	Riverside, California	33	17
74	54	Rochester, New York	23	12
89	59	Sacramento, California	32	15
81	56	Salt Lake City, Utah	27	14
90	70	San Antonio, Texas	32	21
77	66	San Diego, California	25	19
70	56	San Francisco, California	21	13
81	57	San Jose, California	27	14
72	54	Seattle, Washington	22	12
81	61	St. Louis, Missouri	27	16
90	75	Tampa, Florida	32	24
95	70	Tucson, Arizona	35	21
85	63	Tulsa, Oklahoma	29	17
81	67	Virginia Beach, Virginia	27	19
81	64	Washington, DC	27	18

Average Temperatures for Large US Cities in September

Reference

More US City Weather Information