September weather forecast
Mesa, AZ

The scenic city of Mesa in Arizona, with a view of the famous well-manicured golf course near the Red Mountain range
The scenic city of Mesa in Arizona, with a view of the famous well-manicured golf course near the Red Mountain range

Weather in September

The first month of the autumn, September, is still a very hot month in Mesa, Arizona, with an average temperature fluctuating between 95.4°F (35.2°C) and 77.4°F (25.2°C).

Temperature

In Mesa, the average high-temperature in September slightly decreases from 100.9°F (38.3°C) in August to a still sweltering 95.4°F (35.2°C). In Mesa, the average low-temperature is 77.4°F (25.2°C).

Humidity

In Mesa, the average relative humidity in September is 31%.

Rainfall

In Mesa, during September, the rain falls for 7.4 days and regularly aggregates up to 0.79" (20mm) of precipitation. Throughout the year, in Mesa, there are 60.2 rainfall days, and 7.91" (201mm) of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of September, sunrise is at 6:01 am and sunset at 6:52 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 6:13 pm MST.

Sunshine

In September, the average sunshine in Mesa is 9.7h.

UV index

The average daily maximum UV index in September in Mesa is 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
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. 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 Mesa?

In Mesa, in September, the average high-temperature is 95.4°F (35.2°C), and the average low-temperature is 77.4°F (25.2°C).

What is the average humidity in September in Mesa?

In September, the average relative humidity in Mesa is 31%.

How much does it rain in Mesa in September?

In Mesa, Arizona, during September, the rain falls for 7.4 days and regularly aggregates up to 0.79" (20mm) of precipitation.

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

The average day length in September is 12h and 22min.

When is the sunrise / sunset in September in Mesa?

In September, on the first day of the month, sunrise is at 6:01 am and sunset at 6:52 pm. On the last day of the month, in Mesa, sunrise is at 6:21 am and sunset at 6:13 pm MST.

How many hours of sunshine does Mesa have in September?

The average sunshine duration in September in Mesa is 9.7h.

What is the UV index intensity in September in Mesa?

In September, the average daily maximum UV index in Mesa is 7. A UV Index of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Mesa, AZ

Average temperature in September - Mesa, AZ
  • Average high temperature in September: 95.4°F

The warmest month (with the highest average high temperature) is July (101.8°F).
The month with the lowest average high temperature is December (62.4°F).

  • Average low temperature in September: 77.4°F

The month with the highest average low temperature is August (83.8°F).
The coldest month (with the lowest average low temperature) is January (46.4°F).

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Average pressure in September
Mesa, AZ

Average pressure in September - Mesa, AZ
  • Average pressure in September: 29.88"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).

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Average wind speed in September
Mesa, AZ

Average wind speed in September - Mesa, AZ
  • Average wind speed in September: 5.2mph

The windiest months (with the highest average wind speed) are April and May (6.4mph).
The calmest month (with the lowest average wind speed) is December (4.5mph).

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Average humidity in September
Mesa, AZ

Average humidity in September - Mesa, AZ
  • Average humidity in September: 31%

The month with the highest relative humidity is December (44%).
The month with the lowest relative humidity is June (17%).

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Average rainfall in September
Mesa, AZ

Average rainfall in September - Mesa, AZ
  • Average rainfall in September: 0.79"

The wettest month (with the highest rainfall) is July (1.1").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in September
Mesa, AZ

Average rainfall days in September - Mesa, AZ
  • Average rainfall days in September: 7.4 days

The month with the highest number of rainy days is July (10.6 days).
The month with the least rainy days is June (1.2 days).

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

Average daylight in September / Average sunshine in September - Mesa, 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 42min

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

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Average sunshine days in September
Mesa, AZ

Average sunshine days in September - Mesa, AZ
  • Average sunshine days in September: 20 days

The month with the most sunshine days is May (28.4 days).
The month with the least sunshine days is July (17.6 days).

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Average UV index in September
Mesa, AZ

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

The 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
Mesa, AZ

Average cloud cover in September - Mesa, AZ
  • Average cloud cover in September: 10

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
Mesa, AZ

Average visibility in September - Mesa, 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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