September weather forecast and climate
Lowell, AZ

Weather in September

The first month of the autumn, September, is still a warm month in Lowell, Arizona, with average temperature varying between 64°F (17.8°C) and 83.1°F (28.4°C).

Temperature

In September, the average high-temperature is practically the same as in August - a moderately hot 83.1°F (28.4°C). In September, in Lowell, the average low-temperature is 64°F (17.8°C).

Heat index

The average heat index in September is evaluated at 83.7°F (28.7°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, pregnancy, wind), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in Lowell is 48%.

Rainfall

In Lowell, Arizona, during September, the rain falls for 10.6 days and regularly aggregates up to 1.65" (42mm) of precipitation. In Lowell, Arizona, during the entire year, the rain falls for 82 days and collects up to 11.85" (301mm) of precipitation.

Snowfall

In Lowell snow does not fall in April through October.

Daylight

In September, the average length of the day is 12.3h.

Sunshine

In Lowell, the average sunshine is 10.1h.

UV index

In Lowell, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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 Lowell?

In Lowell, in September, the average high-temperature is 83.1°F (28.4°C), and the average low-temperature is 64°F (17.8°C). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that represents influence of the relative humidity to air temperaure, is appraised at 83.7°F (28.7°C).

What is the average humidity in September in Lowell?

The average relative humidity in September is 48%.

How many days does it rain in September in Lowell?

In September, in Lowell, Arizona, the rain falls for 10.6 days. Throughout September, 1.65" (42mm) of precipitation is accumulated.

When it does not snow in Lowell?

In Lowell, Arizona, snow does not fall in April through October.

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

In Lowell, the average length of the day in September is 12.3h.

How long on average sun shines in September in Lowell?

In September, the average sunshine is 10.1h.

How high is the UV index in September in Lowell?

The average daily maximum UV index in September in Lowell is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Lowell, AZ

Average temperature in September - Lowell, AZ
  • Average high temperature in September: 83.1°F

The warmest month (with the highest average high temperature) is June (91°F).
The month with the lowest average high temperature is December (56.1°F).

  • Average low temperature in September: 64°F

The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).

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Average pressure in September
Lowell, AZ

Average pressure in September - Lowell, AZ
  • Average pressure in September: 29.91"

The month with the highest atmospheric pressure is January (30.08").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in September
Lowell, AZ

Average wind speed in September - Lowell, AZ
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in September
Lowell, AZ

Average humidity in September - Lowell, AZ
  • Average humidity in September: 48%

The month with the highest relative humidity is December (49%).
The month with the lowest relative humidity is May (22%).

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Average rainfall in September
Lowell, AZ

Average rainfall in September - Lowell, AZ
  • Average rainfall in September: 1.65"

The wettest month (with the highest rainfall) is July (3.23").
The driest months (with the least rainfall) are April and May (0.08").

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Average rainfall days in September
Lowell, AZ

Average rainfall days in September - Lowell, AZ
  • Average rainfall days in September: 10.6 days

The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is May (2 days).

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Average snowfall in September
Lowell, AZ

Average snowfall in September - Lowell, AZ
  • Average snowfall in September: 0"

The month with the highest snowfall is December (1.3").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Lowell, AZ

Average snowfall days in September - Lowell, AZ
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (1.2 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Lowell, AZ
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.2h).
The month with the shortest days is December (Average daylight: 10.1h).

  • Average sunshine in September: 10.1h

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

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Average sunshine days in September
Lowell, AZ

Average sunshine days in September - Lowell, AZ
  • Average sunshine days in September: 14.9 days

The month with the most sunshine days is May (28.6 days).
The month with the least sunshine days is July (7.8 days).

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Average UV index in September
Lowell, AZ

Average UV index in September - Lowell, AZ
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
Lowell, AZ

Average cloud cover in September - Lowell, AZ
  • Average cloud cover in September: 16

The month with the most cloud cover is July (Cloud cover 22).
The month with the least cloud cover is May (Cloud cover 7).

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Average visibility in September
Lowell, AZ

Average visibility in September - Lowell, 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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