September weather forecast
Scottsdale, AZ

A scenic waterfront canal running through Scottsdale, Arizona
A scenic waterfront canal running through Scottsdale, Arizona

Weather in September

The first month of the autumn, September, is also a sweltering month in Scottsdale, Arizona, with an average temperature varying between 95.9°F (35.5°C) and 77.9°F (25.5°C).

Temperature

In September, the average high-temperature marginally drops from a very hot 101.8°F (38.8°C) in August to a still torrid 95.9°F (35.5°C). In Scottsdale, in September, the average low-temperature is 77.9°F (25.5°C).

Humidity

The average relative humidity in September is 30%.

Rainfall

In Scottsdale, it is raining for 7.3 days, with typically 0.94" (24mm) of accumulated precipitation. In Scottsdale, during the entire year, the rain falls for 57.7 days and collects up to 7.72" (196mm) of precipitation.

Daylight

In Scottsdale, Arizona, the average length of the day in September is 12h and 22min.
On the first day of September, sunrise is at 6:01 am and sunset at 6:53 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 6:13 pm MST.

Sunshine

In Scottsdale, the average sunshine in September is 9.6h.

UV index

In September, the average daily maximum UV index in Scottsdale is 7. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 7 in September interpret into the following advice:
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 the 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.
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FAQ

What is the average humidity in September in Scottsdale?

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

How much does it rain in Scottsdale in September?

In Scottsdale, Arizona, during September, the rain falls for 7.3 days and regularly aggregates up to 0.94" (24mm) of precipitation.

How many hours of daylight does Scottsdale have in September?

In Scottsdale, the average day length in September is 12h and 22min.

What time are sunrise and sunset in September in Scottsdale?

On the first day of September in Scottsdale, sunrise is at 6:01 am and sunset at 6:53 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 6:13 pm MST.

How many hours of sunshine does Scottsdale have in September?

In September, the average sunshine duration is 9.6h.

What is the UV index reading in September in Scottsdale?

The average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Scottsdale, AZ

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).

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Average pressure in September
Scottsdale, AZ

Average pressure in September - Scottsdale, AZ
  • Average pressure in September: 29.87"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).

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Average wind speed in September
Scottsdale, AZ

Average wind speed in September - Scottsdale, AZ
  • Average wind speed in September: 5.1mph

The windiest months (with the highest average wind speed) are April and May (6.3mph).
The calmest month (with the lowest average wind speed) is December (4.4mph).

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Average humidity in September
Scottsdale, AZ

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%).

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Average rainfall in September
Scottsdale, AZ

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 least rainfall) is June (0.08").

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Average rainfall days in September
Scottsdale, AZ

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 least rainy days is June (1 days).

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Average daylight in September /
Average sunshine in September
Scottsdale, AZ

Average daylight in September / Average sunshine in September - Scottsdale, AZ
  • Average daylight in September: 12h and 22min

The month with the longest days is June (Average daylight: 14h and 20min).
The month with the shortest days is December (Average daylight: 9h and 59min).

  • Average sunshine in September: 9h and 36min

The months with the most sunshine are June and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).

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Average sunshine days in September
Scottsdale, AZ

Average sunshine days in September - Scottsdale, AZ
  • Average sunshine days in September: 20.9 days

The month with the most sunshine days is May (28.7 days).
The month with the least sunshine days is July (16.8 days).

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Average UV index in September
Scottsdale, AZ

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

The 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).

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Average cloud cover in September
Scottsdale, AZ

Average cloud cover in September - Scottsdale, AZ
  • Average cloud cover in September: 11

The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 5).

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Average visibility in September
Scottsdale, AZ

Average visibility in September - Scottsdale, AZ
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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