United StatesAverage weather for Phoenix in September
It's hot in September in Phoenix with an average temperature of 38°C. Temperatures this month range from a low of 36°C to a high of 41°C. At night, you can expect temperatures between 23°C and 30°C.
Start of September
The month of September starts in Phoenix with hot temps, averaging around 40°C during the day and nights around 29°C. There’s little chance of precipitation. The weather’s mostly sunny and dry. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
Mid September
By mid-September, daytime temps drop to around 39°C, with nights around 27°C. Not much precipitation expected during this period. It’s mostly dry and sunny. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
End of September
By the end of September, the average daytime temperature in Phoenix is around 37°C, while nighttime temps are about 25°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
In September, there is an average of 21 mm of precipitation, spread over 3 days. The wind speed is around 4 Bft, mostly coming from the South.
Phoenix in September |
New York | ||
|---|---|---|---|
 Average temperature |
38°C | 27°C | |
 Max. temperature |
41°C | 31°C | |
| Min. temperature |
36°C | -5°C | |
 Total precipitation |
21 mm | 57 mm | |
| Rainy days |
3 days | 9 days | |
August
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Phoenix?
September isn’t a good month to be in Phoenix. The average temperature of 38°C this month is uncomfortably hot for a comfortable stay.
Temperature records
With 45°C in 2020, Phoenix reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 27°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of 16°C to a highest value of 33°C.
Check out the climate of Phoenix for all months and discover the best travel time
Daily Temperature in September in Phoenix
This chart shows the average daily high and low temperatures in September for Phoenix, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Phoenix
The chart below shows the average daily precipitation in September for Phoenix, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 3 days of precipitation in Phoenix.
Daily UV index in September in Phoenix
This chart shows the average daily UV index in September in Phoenix, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Phoenix over the years
This chart shows the average temperature in September in Phoenix, measured in degrees Celsius, over the past few years.
Total precipitation in September in Phoenix over the years
This chart shows the average precipitation in September in Phoenix, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Phoenix
Click on any day in September to get detailed info about the usual weather on that day in Phoenix. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Phoenix
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Average weather in Phoenix by month
Click on a month below to see detailed weather info for Phoenix. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
