September weather forecast
Parker, AZ

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The calm Colorado River, riverside city of Parker in Arizona, and the dramatic mountainous landscape
The calm Colorado River, riverside city of Parker in Arizona, and the dramatic mountainous landscape

Weather in September

September begins the transition from summer to autumn in Parker, Arizona. A noticeable cooling trend is seen as temperatures gradually reduce, peaking at 96.8°F (36°C) for the month. As the month progresses, daylight hours begin to shorten, hinting at the impending arrival of fall. Lower wind speeds prevail and with low chances of rain, the weather remains predominantly dry. Despite nominal humidity, the lesser heat makes the weather more tolerable.

Temperature

The onset of September results in a small decrease in the average high-temperature, moderately receding from 103.6°F (39.8°C) in August to a still torrid 96.8°F (36°C). Parker experiences an average low-temperature of 79.9°F (26.6°C) in month of September.

Humidity

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

Rainfall

In Parker, in September, during 4.8 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, in Parker, there are 39.4 rainfall days, and 3.9" (99mm) of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of the month, sunrise is at 6:11 am and sunset at 7:02 pm. On the last day of September, sunrise is at 6:31 am and sunset at 6:22 pm MST.

Sunshine

The average sunshine in September is 9.8h.

UV index

In September, the average daily maximum UV index in Parker is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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Frequently asked questions

How hot is it in Parker in September?

In Parker, in September, 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 Parker?

The average relative humidity in September in Parker is 25%.

How much does it rain in Parker in September?

In Parker, in September, during 4.8 rainfall days, 0.43" (11mm) of precipitation is typically accumulated.

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

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

When is the sunrise / sunset in September in Parker?

On the first day of September in Parker, Arizona, sunrise is at 6:11 am and sunset at 7:02 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 6:22 pm MST.

How long on average sun shines in September in Parker?

The average sunshine duration in September in Parker, Arizona, is 9.8h.

What is the UV index intensity in September in Parker?

The average daily maximum UV index in September in Parker, Arizona, is 7. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Parker, AZ

Average temperature in September - Parker, 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
Parker, AZ

Average pressure in September - Parker, AZ
  • Average pressure in September: 29.81"Hg

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

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Average wind speed in September
Parker, AZ

Average wind speed in September - Parker, 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
Parker, AZ

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

The 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
Parker, AZ

Average rainfall in September - Parker, 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
Parker, AZ

Average rainfall days in September - Parker, 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
Parker, AZ

Average daylight in September / Average sunshine in September - Parker, AZ
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 9h and 5min

The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).

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Average sunshine days in September
Parker, AZ

Average sunshine days in September - Parker, 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
Parker, AZ

Average UV index in September - Parker, 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
Parker, AZ

Average cloud cover in September - Parker, 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
Parker, AZ

Average visibility in September - Parker, 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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Parker, Arizona, USA

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