September weather forecast and climate
Somerton, AZ

Weather in September

The first month of the autumn, September, is also a sweltering month in Somerton, Arizona, with temperature in the range of an average low of 81°F (27.2°C) and an average high of 99.5°F (37.5°C).

Temperature

In September, the average high-temperature marginally drops, from a scorching 105.1°F (40.6°C) in August, to a very hot 99.5°F (37.5°C). In Somerton, Arizona, the average low-temperature is 81°F (27.2°C).

Humidity

The average relative humidity in Somerton, Arizona, is 29%.

Rainfall

The wettest months are July and September, with an average 0.39" (10mm) of rainfall.

Daylight

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

Sunshine

In September, the average sunshine is 9.8h.

UV index

June through September, with an average maximum UV index of 8, are months with the highest UV index in Somerton. A UV Index estimate of 8 to 10 represents a very high health risk from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 8 interpret into the following advice:
Take special precautions, as unprotected skin can be damaged and can burn quickly. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Somerton?

In September, in Somerton, the average high-temperature is 99.5°F (37.5°C), and the average low-temperature is 81°F (27.2°C).

What is the average humidity in September in Somerton?

In Somerton, Arizona, the average relative humidity in September is 29%.

How many days does it rain in September in Somerton?

In Somerton, Arizona, in September, during 4.6 rainfall days, 0.39" (10mm) of precipitation is typically accumulated.

What is the rainiest month in Somerton?

The wettest months in Somerton are July and September, with an average 0.39" (10mm) of rainfall.

How many hours of daylight does Somerton have in September?

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

How long on average sun shines in September in Somerton?

The average sunshine in September in Somerton, Arizona, is 9.8h.

What is the month with the highest UV index in Somerton?

June through September, with an average maximum UV index of 8, are months with the highest UV index in Somerton, Arizona.

What is the UV index intensity in September in Somerton?

The average daily maximum UV index in September is 8. A UV Index value of 8 to 10 symbolizes a very high hazard to health from unprotected exposure to the UV radiation.

Average temperature in September
Somerton, AZ

Average temperature in September - Somerton, AZ
  • Average high temperature in September: 99.5°F

The warmest month (with the highest average high temperature) is July (105.3°F).
The month with the lowest average high temperature is December (66°F).

  • Average low temperature in September: 81°F

The month with the highest average low temperature is August (86.4°F).
The coldest month (with the lowest average low temperature) is December (50.5°F).

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Average pressure in September
Somerton, AZ

Average pressure in September - Somerton, AZ
  • Average pressure in September: 29.78"

The month with the highest atmospheric pressure is January (30.07").
The month with the lowest atmospheric pressure is June (29.74").

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Average wind speed in September
Somerton, AZ

Average wind speed in September - Somerton, AZ
  • Average wind speed in September: 6.9mph

The windiest months (with the highest average wind speed) are April and July (8.5mph).
The calmest month (with the lowest average wind speed) is November (6.6mph).

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Average humidity in September
Somerton, AZ

Average humidity in September - Somerton, AZ
  • Average humidity in September: 29%

The month with the highest relative humidity is December (38%).
The month with the lowest relative humidity is June (22%).

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Average rainfall in September
Somerton, AZ

Average rainfall in September - Somerton, AZ
  • Average rainfall in September: 0.39"

The wettest months (with the highest rainfall) are July and September (0.39").
The driest months (with the least rainfall) are May and June (0.04").

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Average rainfall days in September
Somerton, AZ

Average rainfall days in September - Somerton, AZ
  • Average rainfall days in September: 4.6 days

The month with the highest number of rainy days is July (5.8 days).
The month with the least rainy days is May (0.8 days).

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

Average daylight in September / Average sunshine in September - Somerton, 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: 9.8h

The month with the most sunshine is June (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 7.2h).

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Average sunshine days in September
Somerton, AZ

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

The month with the most sunshine days is May (30.2 days).
The month with the least sunshine days is July (22.1 days).

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Average UV index in September
Somerton, AZ

Average UV index in September - Somerton, AZ
  • Average UV index in September: 8

Months with the highest UV index are June, July, August and September (UV index 8).
Months with the lowest UV index are November and December (UV index 4).

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Average cloud cover in September
Somerton, AZ

Average cloud cover in September - Somerton, AZ
  • Average cloud cover in September: 8

The month with the most cloud cover is December (Cloud cover 17).
The month with the least cloud cover is June (Cloud cover 5).

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Average visibility in September
Somerton, AZ

Average visibility in September - Somerton, 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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