September weather forecast and climate
Casa Grande, AZ

Weather in September

The first month of the autumn, September, is also a sweltering month in Casa Grande, Arizona, with average temperature varying between 77.2°F (25.1°C) and 95.9°F (35.5°C).

Temperature

In Casa Grande, the average high-temperature in September is relatively the same as in August - a still torrid 95.9°F (35.5°C). The average low-temperature, in September, is 77.2°F (25.1°C).

Humidity

In Casa Grande, the average relative humidity in September is 33%.

Rainfall

In Casa Grande, during 7.5 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. Throughout the year, there are 59.1 rainfall days, and 7.36" (187mm) of precipitation is accumulated.

Daylight

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

Sunshine

The average sunshine in September is 9.7h.

UV index

The average daily maximum UV index in Casa Grande is 7. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 7 in September interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Casa Grande?

The average high-temperature, in September, in Casa Grande, Arizona, is 95.9°F (35.5°C), while the average low-temperature is 77.2°F (25.1°C).

What is the average humidity in September in Casa Grande?

The average relative humidity in September in Casa Grande, Arizona, is 33%.

How much does it rain in Casa Grande in September?

In Casa Grande, Arizona, in September, it is raining for 7.5 days, with typically 0.91" (23mm) of accumulated precipitation.

How many hours of daylight does Casa Grande have in September?

In September, the average length of the day in Casa Grande is 12.4h.

How many hours of sunshine does Casa Grande have in September?

In September, the average sunshine in Casa Grande is 9.7h.

How high is the UV index in September in Casa Grande?

The average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to the Sun's UV rays.

Average temperature in September
Casa Grande, AZ

Average temperature in September - Casa Grande, AZ
  • Average high temperature in September: 95.9°F

The warmest month (with the highest average high temperature) is July (102°F).
The month with the lowest average high temperature is December (62.6°F).

  • Average low temperature in September: 77.2°F

The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (46.4°F).

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Average pressure in September
Casa Grande, AZ

Average pressure in September - Casa Grande, AZ
  • Average pressure in September: 29.86"

The month with the highest atmospheric pressure is January (30.08").
The month with the lowest atmospheric pressure is June (29.81").

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Average wind speed in September
Casa Grande, AZ

Average wind speed in September - Casa Grande, AZ
  • Average wind speed in September: 5.5mph

The windiest months (with the highest average wind speed) are April and May (7.1mph).
The calmest months (with the lowest average wind speed) are January and December (4.9mph).

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Average humidity in September
Casa Grande, AZ

Average humidity in September - Casa Grande, AZ
  • Average humidity in September: 33%

The month with the highest relative humidity is December (45%).
The month with the lowest relative humidity is June (16%).

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Average rainfall in September
Casa Grande, AZ

Average rainfall in September - Casa Grande, AZ
  • Average rainfall in September: 0.91"

The wettest month (with the highest rainfall) is July (1.02").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in September
Casa Grande, AZ

Average rainfall days in September - Casa Grande, AZ
  • Average rainfall days in September: 7.5 days

The month with the highest number of rainy days is July (10.7 days).
The month with the least rainy days is June (1.8 days).

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Average daylight in September /
Average sunshine in September
Casa Grande, AZ

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

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 9.7h

The month with the most sunshine is June (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.9h).

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Average sunshine days in September
Casa Grande, AZ

Average sunshine days in September - Casa Grande, AZ
  • Average sunshine days in September: 19.5 days

The month with the most sunshine days is May (28.4 days).
The month with the least sunshine days is July (15.4 days).

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Average UV index in September
Casa Grande, AZ

Average UV index in September - Casa Grande, AZ
  • Average UV index in September: 7

Months with the highest UV index are 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
Casa Grande, AZ

Average cloud cover in September - Casa Grande, 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 6).

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Average visibility in September
Casa Grande, AZ

Average visibility in September - Casa Grande, AZ
  • Average visibility in September: 6mi

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

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