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Temperatures in September
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Temperature in The United States of America in September

September in the United States of America has maximum daytime temperatures ranging from very low in Denali National Park and Preserve with 1°C to extremely high temperatures in Furnace Creek with 42°C. Nighttime temperatures generally drop to 25°C in Furnace Creek and -5°C in Denali National Park and Preserve.

What is the temperature of the different cities in the United States of America in September?

Find the average daytime temperatures in September for the most popular destinations in the United States of America on the map below. Click on a destination dot for more detailed information.

Weather conditions Weather
Temperatures
Precipitation
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Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

  • What is the warmest city in September in the United States of America?
    • Furnace Creek tops the warmest city list in our database with average maximum daytime temperatures around 42°C and a minimum nighttime temperature of around 25°C.

  • What is the coldest city in September in the United States of America?
    • The coldest city in September in the United States of America is Denali National Park and Preserve when we check our database. The maximum daytime temperatures are around 1°C and minimum nighttime temperatures fall around -5°C.

  • How much sun does the United States of America get in September?
    • New York City enjoys close to 218 hours of sunlight. This not only brightens the days but also uplifts the atmosphere during the month.

  • What is the water's temperature in September?
    • The water temperature averages approximately 30°C in Key West this month, which is a bit warm water for swimming. For many people, water temperatures around 30°C might feel quite warm. Especially when compared to average swimming pool temperatures which are typically between 25°C and 28°C.

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    • Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.