September weather forecast and climate
Poston, AZ

Weather in September

The first month of the autumn, September, is still a torrid month in Poston, Arizona, with average temperature ranging between max 96.8°F (36°C) and min 79.9°F (26.6°C).

Temperature

In Poston, the average high-temperature in September slightly decreases, from a torrid 103.6°F (39.8°C) in August, to a still very hot 96.8°F (36°C). The average low-temperature, in September, is 79.9°F (26.6°C).

Humidity

The average relative humidity in Poston is 25%.

Rainfall

In Poston, Arizona, during 4.8 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. In Poston, during the entire year, the rain falls for 39.4 days and collects up to 3.9" (99mm) of precipitation.

Daylight

In Poston, Arizona, the average length of the day in September is 12.4h.

Sunshine

In Poston, the average sunshine is 9.8h.

UV index

The average daily maximum UV index in Poston, Arizona, is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation 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. 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 Poston?

In September, in Poston, the average high-temperature is 96.8°F (36°C), and the average low-temperature is 79.9°F (26.6°C).

What is the average humidity in September in Poston?

In Poston, the average relative humidity in September is 25%.

How many days does it rain in September in Poston?

In Poston, in September, it is raining for 4.8 days, with typically 0.43" (11mm) of accumulated precipitation.

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

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

How many hours of sunshine does Poston have in September?

In September, the average sunshine in Poston is 9.8h.

What is the UV index intensity in September in Poston?

The average daily maximum UV index in September in Poston, Arizona, is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV radiation.

Average temperature in September
Poston, AZ

Average temperature in September - Poston, AZ
  • Average high temperature in September: 96.8°F

The warmest month (with the highest average high temperature) is July (104.2°F).
The month with the lowest average high temperature is December (61.2°F).

  • Average low temperature in September: 79.9°F

The month with the highest average low temperature is August (85.6°F).
The coldest month (with the lowest average low temperature) is December (47.1°F).

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Average pressure in September
Poston, AZ

Average pressure in September - Poston, AZ
  • Average pressure in September: 29.81"

The month with the highest atmospheric pressure is January (30.09").
The month with the lowest atmospheric pressure is June (29.74").

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Average wind speed in September
Poston, AZ

Average wind speed in September - Poston, AZ
  • Average wind speed in September: 6.5mph

The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is November (5.8mph).

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Average humidity in September
Poston, AZ

Average humidity in September - Poston, AZ
  • Average humidity in September: 25%

Months with the highest relative humidity are January and December (39%).
The month with the lowest relative humidity is June (15%).

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Average rainfall in September
Poston, AZ

Average rainfall in September - Poston, AZ
  • Average rainfall in September: 0.43"

The wettest month (with the highest rainfall) is July (0.59").
The driest months (with the least rainfall) are May and June (0.04").

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Average rainfall days in September
Poston, AZ

Average rainfall days in September - Poston, AZ
  • Average rainfall days in September: 4.8 days

The month with the highest number of rainy days is July (7.8 days).
The month with the least rainy days is May (1.2 days).

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

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

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 9.8h

The month with the most sunshine is June (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 7h).

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Average sunshine days in September
Poston, AZ

Average sunshine days in September - Poston, AZ
  • Average sunshine days in September: 23 days

The month with the most sunshine days is May (29.3 days).
The month with the least sunshine days is July (20.2 days).

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Average UV index in September
Poston, AZ

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

The month with the highest UV index is July (UV index 9).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in September
Poston, AZ

Average cloud cover in September - Poston, AZ
  • Average cloud cover in September: 7

The month with the most cloud cover is December (Cloud cover 19).
The month with the least cloud cover is June (Cloud cover 5).

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Average visibility in September
Poston, AZ

Average visibility in September - Poston, 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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