September weather forecast
South Tucson, AZ

Weather in September

September, the first month of the autumn in South Tucson, is also a hot month, with an average temperature ranging between max 88.7°F (31.5°C) and min 70.7°F (21.5°C).

Temperature

In South Tucson, Arizona, the average high-temperature in September is relatively the same as in August - a still tropical 88.7°F (31.5°C). In September, the average low-temperature is 70.7°F (21.5°C).

Heat index

The average heat index in September is appraised at a hot 89.6°F (32°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, metabolic differences, pregnancy, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the 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

In September, the average relative humidity in South Tucson is 40%.

Rainfall

In September, in South Tucson, the rain falls for 8.6 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. Throughout the year, in South Tucson, Arizona, there are 66.1 rainfall days, and 7.95" (202mm) of precipitation is accumulated.

Snowfall

February through December are months without snowfall in South Tucson.

Daylight

In South Tucson, the average length of the day in September is 12h and 21min.
On the first day of September in South Tucson, sunrise is at 5:59 am and sunset at 6:48 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 6:10 pm MST.

Sunshine

In September, the average sunshine in South Tucson is 9.8h.

UV index

In September, the average daily maximum UV index in South Tucson is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against 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 South Tucson?

The average high-temperature, in September, in South Tucson, is 88.7°F (31.5°C), while the average low-temperature is 70.7°F (21.5°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in September is appraised at 89.6°F (32°C).

What is the average humidity in September in South Tucson?

The average relative humidity in September is 40%.

How many days does it rain in September in South Tucson?

In South Tucson, in September, it is raining for 8.6 days, with typically 0.98" (25mm) of accumulated precipitation.

When it does not snow in South Tucson?

In South Tucson, snow does not fall in February through December.

How many hours of daylight does South Tucson have in September?

The average day length in September in South Tucson is 12h and 21min.

When are sunrise and sunset in September in South Tucson?

On the first day of September, sunrise is at 5:59 am and sunset at 6:48 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 6:10 pm MST.

How many hours of sunshine does South Tucson have in September?

In September, the average sunshine duration in South Tucson is 9.8h.

How high is the UV index in September in South Tucson?

In September, the average daily maximum UV index in South Tucson is 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
South Tucson, AZ

Average temperature in September - South Tucson, AZ
  • Average high temperature in September: 88.7°F

The warmest month (with the highest average high temperature) is June (96.6°F).
The month with the lowest average high temperature is December (60.8°F).

  • Average low temperature in September: 70.7°F

The month with the highest average low temperature is July (77°F).
The coldest months (with the lowest average low temperature) are January and December (43°F).

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Average pressure in September
South Tucson, AZ

Average pressure in September - South Tucson, AZ
  • Average pressure in September: 29.88"Hg

The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

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Average wind speed in September
South Tucson, AZ

Average wind speed in September - South Tucson, AZ
  • Average wind speed in September: 6.1mph

The windiest months (with the highest average wind speed) are April and May (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in September
South Tucson, AZ

Average humidity in September - South Tucson, AZ
  • Average humidity in September: 40%

The month with the highest relative humidity is December (45%).
The month with the lowest relative humidity is June (19%).

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Average rainfall in September
South Tucson, AZ

Average rainfall in September - South Tucson, AZ
  • Average rainfall in September: 0.98"

The wettest month (with the highest rainfall) is July (1.42").
The driest month (with the least rainfall) is May (0.08").

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Average rainfall days in September
South Tucson, AZ

Average rainfall days in September - South Tucson, AZ
  • Average rainfall days in September: 8.6 days

The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is May (1.3 days).

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Average snowfall in September
South Tucson, AZ

Average snowfall in September - South Tucson, AZ
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in September
South Tucson, AZ

Average snowfall days in September - South Tucson, AZ
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in September /
Average sunshine in September
South Tucson, AZ

Average daylight in September / Average sunshine in September - South Tucson, AZ
  • Average daylight in September: 12h and 21min

The month with the longest days is June (Average daylight: 14h and 14min).
The month with the shortest days is December (Average daylight: 10h and 5min).

  • Average sunshine in September: 9h and 48min

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

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Average sunshine days in September
South Tucson, AZ

Average sunshine days in September - South Tucson, AZ
  • Average sunshine days in September: 19.5 days

The month with the most sunshine days is May (29.3 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in September
South Tucson, AZ

Average UV index in September - South Tucson, AZ
  • Average UV index in September: 7

The month with the highest UV index is June (UV index 8).
The months with the lowest UV index are November and December (UV index 3).

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Average cloud cover in September
South Tucson, AZ

Average cloud cover in September - South Tucson, AZ
  • Average cloud cover in September: 13

The month with the most cloud cover is December (Cloud cover 19).
The months with the least cloud cover are May and June (Cloud cover 7).

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Average visibility in September
South Tucson, AZ

Average visibility in September - South Tucson, 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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