For September, the Average Low-Temperature Map of the US In September is 66.0°F, 1.1°F. It was above the 20th century average, ranking in the warmest one-third of the 126-year record. Temperatures this month are especially comfortable in cities such as New York and Philadelphia where the days are usually around 75 °F (24 °C) and the nights average about 60 °F (16 °C).
High °F | Low °F | City | High °C | Low °C |
---|---|---|---|---|
82 | 65 | Atlanta, Georgia | 28 | 18 |
91 | 69 | Austin, Texas | 33 | 21 |
78 | 58 | Baltimore, Maryland | 26 | 14 |
85 | 64 | Birmingham, Alabama | 30 | 18 |
72 | 57 | Boston, Massachusetts | 22 | 14 |
71 | 53 | Buffalo, New York | 22 | 12 |
81 | 60 | Charlotte, North Carolina | 27 | 16 |
75 | 54 | Chicago, Illinois | 24 | 12 |
79 | 55 | Cincinnati, Ohio | 26 | 13 |
74 | 56 | Cleveland, Ohio | 23 | 13 |
77 | 57 | Columbus, Ohio | 25 | 14 |
89 | 69 | Dallas, Texas | 32 | 21 |
77 | 48 | Denver, Colorado | 25 | 9 |
74 | 55 | Detroit, Michigan | 23 | 13 |
75 | 53 | Hartford, Connecticut | 24 | 12 |
90 | 70 | Houston, Texas | 32 | 21 |
78 | 56 | Indianapolis, Indiana | 25 | 13 |