Scottsdale
Arizona, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Scottsdale, AZ

A scenic waterfront canal running through Scottsdale, Arizona
A scenic waterfront canal running through Scottsdale, Arizona
September, the first month of the autumn, in Scottsdale, is also a sweltering month, with temperature in the range of an average high of 95.9°F (35.5°C) and an average low of 77.9°F (25.5°C).

Temperature

In Scottsdale, the average high-temperature slightly decreases, from a torrid 101.8°F (38.8°C) in August, to a still sweltering 95.9°F (35.5°C). In September, in Scottsdale, Arizona, the average low-temperature is 77.9°F (25.5°C).

Humidity

The average relative humidity in September is 30%.

Rainfall

In September, in Scottsdale, the rain falls for 7.3 days. Throughout September, 0.94" (24mm) of precipitation is accumulated. Throughout the year, there are 57.7 rainfall days, and 7.72" (196mm) of precipitation is accumulated.

Daylight

The average length of the day is 12.4h.

Sunshine

In Scottsdale, the average sunshine is 9.6h.

UV index

The average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Scottsdale?

In Scottsdale, Arizona, in September, the average high-temperature is 95.9°F (35.5°C), and the average low-temperature is 77.9°F (25.5°C).

What is the average humidity in September in Scottsdale?

In Scottsdale, the average relative humidity in September is 30%.

How many days does it rain in September in Scottsdale?

In September, the rain falls for 7.3 days. Throughout September, 0.94" (24mm) of precipitation is accumulated.

What is the average length of the day in September in Scottsdale?

The average length of the day in September is 12.4h.

How many hours of sunshine does Scottsdale have in September?

The average sunshine in September in Scottsdale is 9.6h.

What is the UV index intensity in September in Scottsdale?

In September, the average daily maximum UV index in Scottsdale is 7. A UV Index estimate of 6 to 7 represents a high health threat from the exposure to the Sun's UV radiation.
Average temperature in September - Scottsdale, AZ
  • Average high temperature in September: 95.9°F

The warmest month (with the highest average high temperature) is July (102.6°F).
The month with the lowest average high temperature is December (62.8°F).

  • Average low temperature in September: 77.9°F

The month with the highest average low temperature is August (84.4°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).

Average humidity in September - Scottsdale, AZ
  • Average humidity in September: 30%

The month with the highest relative humidity is December (44%).
The month with the lowest relative humidity is June (16%).

Average rainfall in September - Scottsdale, AZ
  • Average rainfall in September: 0.94"

The wettest month (with the highest rainfall) is July (1.14").
The driest month (with the lowest rainfall) is June (0.08").

Average rainfall days in September - Scottsdale, AZ
  • Average rainfall days in September: 7.3 days

The month with the highest number of rainy days is July (10.2 days).
The month with the lowest number of rainy days is June (1 days).

Average daylight in September / Average sunshine in September - Scottsdale, AZ
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 9.6h

Months with most sunshine are June and August (Average sunshine: 12.1h).
The month with least sunshine is December (Average sunshine: 6.8h).

Average UV index in September - Scottsdale, AZ
  • Average UV index in September: 7

Months with the highest UV index are May, June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).