The USA enjoys a beautiful climate in September with plenty of warm sunshine and clear blue skies for most of the month. According to the latest monthly summary from NOAA National Centers for Environmental Information (NCEI), The average Low Temperature & average high Temperature for the month of September range from a high of 72.7 degrees Fahrenheit (22.6 degrees Celsius) in Florida to a low of 26.7 °F (-2.9 °C) in Alaska. For the entire United States, excluding Hawaii and Alaska, the season averages 53.9 °F (12.2 °C).
The weather fluctuates slightly depending on where you are in the USA. On average, most regions have an average temperature of 30°C, which is perfect weather for sunbathing and relaxing on the beach. Winds reach speeds of up to 7mph and help to control the humidity, which can reach highs of 67% in September. There are 12 hours of sunshine per day with an average rainfall of 125mm spread over the month.
Average Low & High Temperature of US September
| 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 |
| High °F | Low °F | City | High °C | Low °C |
|---|---|---|---|---|
| 87 | 70 | Jacksonville, Florida | 31 | 21 |
| 80 | 61 | Kansas City, Missouri | 27 | 16 |
| 94 | 71 | Las Vegas, Nevada | 34 | 22 |
| 83 | 63 | Los Angeles, California | 28 | 17 |
| 82 | 61 | Louisville, Kentucky | 28 | 16 |
| 85 | 65 | Memphis, Tennessee | 30 | 18 |
| 89 | 77 | Miami, Florida | 32 | 25 |
| 71 | 55 | Milwaukee, Wisconsin | 22 | 13 |
| 72 | 52 | Minneapolis, Minnesota | 22 | 11 |
| 82 | 61 | Nashville, Tennessee | 28 | 16 |
| 88 | 72 | New Orleans, Louisiana | 31 | 22 |
| 75 | 61 | New York, New York | 24 | 16 |
| 85 | 63 | Oklahoma City, Oklahoma | 29 | 17 |
| 90 | 73 | Orlando, Florida | 32 | 23 |
| 78 | 60 | Philadelphia, Pennsylvania | 26 | 16 |
| 100 | 75 | Phoenix, Arizona | 38 | 24 |
| 74 | 54 | Pittsburgh, Pennsylvania | 24 | 12 |
The US Temperature Map September is based on data collected by weather stations throughout each state during the years 1971 to 2000 and made available by the NOAA National Climatic Data Center of the United States.