September weather forecast
Phoenix, SC

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Phoenix, South Carolina, with an average temperature varying between 84.9°F (29.4°C) and 65.1°F (18.4°C).

Temperature

The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a tropical 90.3°F (32.4°C) in August to a moderately hot 84.9°F (29.4°C). During the month of September, the nighttime temperature falls to an average of 65.1°F (18.4°C).

Heat index

Throughout September, the heat index is appraised at a tropical 93.2°F (34°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Note that heat index values are valued for light wind and location in the shade. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', evaluates the perceived heat by adding the effect of moisture in the air. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.

Humidity

In Phoenix, the average relative humidity in September is 72%.

Rainfall

The month with the least rainfall is September, when the rain falls for 11.4 days and typically collects 1.5" (38mm) of precipitation.

Snowfall

In Phoenix, snow does not fall in April through December.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of the month, sunrise is at 7:02 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:13 pm EDT.

Sunshine

In Phoenix, the average sunshine in September is 8.5h.

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 5 during September leads to these instructions:
Take precautions - Protection against sun damage is advised. When the Sun is at its strongest around midday, find shade and limit exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Updated: Jul 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during September?

In September, the average high-temperature and low-temperature are 84.9°F (29.4°C) and 65.1°F (18.4°C) respectively. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, in September is appraised at 93.2°F (34°C).

What is the average humidity in September?

The average relative humidity in September is 72%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 11.4 days and typically collects 1.5" (38mm) of precipitation.

How much does it rain in September?

In September, the rain falls for 11.4 days. Throughout September, 1.5" (38mm) of precipitation is accumulated.

When it does not snow?

April through December are months without snowfall.

How many hours of daylight does Phoenix have in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 7:02 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:13 pm EDT.

How long on average sun shines in September in Phoenix?

In Phoenix, the average sunshine duration in September is 8.5h.

How high is the UV index in September?

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Phoenix, SC

Average temperature in September - Phoenix, SC
  • Average high temperature in September: 84.9°F

The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (51.8°F).

  • Average low temperature in September: 65.1°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).

Average pressure in September
Phoenix, SC

Average pressure in September - Phoenix, SC
  • Average pressure in September: 30.02"Hg

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed in September
Phoenix, SC

Average wind speed in September - Phoenix, SC
  • Average wind speed in September: 5.4mph

The windiest months (with the highest average wind speed) are February and April (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in September
Phoenix, SC

Average humidity in September - Phoenix, SC
  • Average humidity in September: 72%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).

Average rainfall in September
Phoenix, SC

Average rainfall in September - Phoenix, SC
  • Average rainfall in September: 1.5"

The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is September (1.5").

Average rainfall days in September
Phoenix, SC

Average rainfall days in September - Phoenix, SC
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is October (8.3 days).

Average snowfall in September
Phoenix, SC

Average snowfall in September - Phoenix, SC
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").

Average snowfall days in September
Phoenix, SC

Average snowfall days in September - Phoenix, SC
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (0.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average daylight in September /
Average sunshine in September
Phoenix, SC

Average daylight in September / Average sunshine in September - Phoenix, SC
  • 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: 8h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

Average sunshine days in September
Phoenix, SC

Average sunshine days in September - Phoenix, SC
  • Average sunshine days in September: 17 days

The month with the most sunshine days is October (21.4 days).
The month with the least sunshine days is July (12.1 days).

Average UV index in September
Phoenix, SC

Average UV index in September - Phoenix, SC
  • Average UV index in September: 5

The months with the highest UV index are June and August (UV index 7).
The month with the lowest UV index is January (UV index 2).

Average cloud cover in September
Phoenix, SC

Average cloud cover in September - Phoenix, SC
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 43).
The months with the least cloud cover are June and October (Cloud cover 29).

Average visibility in September
Phoenix, SC

Average visibility in September - Phoenix, SC
  • 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).

Phoenix, South Carolina, USA

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