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 advent of September brings a subtle shift in temperature, with the average high moving from 103.6°F (39.8°C) in August to a still torrid 96.8°F (36°C). Parker in September anticipates an average nighttime temperature of 79.9°F (26.6°C).

Humidity

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

Rainfall

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

Daylight

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

Sunshine

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

UV index

The average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: An average maximum UV index of 7 in September leads to these recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Updated: Aug 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

The high-temperature, in September, in Parker, records 96.8°F (36°C), while the low-temperature is 79.9°F (26.6°C).

What is the average humidity in September?

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

How many days does it rain in September?

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

How many hours of daylight does Parker have in September?

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

What time are sunrise and sunset in September?

On the first day of September, 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?

The average sunshine duration in September is 9.8h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.
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).

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).

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).

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%).

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").

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).

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).

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).

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).

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).

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).

Parker, Arizona, USA

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