September weather forecast
Chappells, SC

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Weather in September

September, the first month of the autumn in Chappells, is still a warm month, with an average temperature fluctuating between 65.1°F (18.4°C) and 84.9°F (29.4°C).

Temperature

The start of September comes with a small reduction in the average high-temperature, subtly receding from a hot 90.3°F (32.4°C) in August to a warm 84.9°F (29.4°C). Chappells reports an average low-temperature of 65.1°F (18.4°C) during the nights of September.

Heat index

During September, the heat index is appraised at a hot 93.2°F (34°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.

Humidity

In Chappells, 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

April through December are months without snowfall in Chappells.

Daylight

The average length of the day in September is 12h and 22min.
On the first day of September, sunrise is at 7:01 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:12 pm EDT.

Sunshine

The average sunshine in September is 8.5h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. To avoid the Sun's strongest rays, limit exposure around the mid-day period. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Updated: Jul 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September?

In Chappells, in September, the average high-temperature is 84.9°F (29.4°C), and the average low-temperature is 65.1°F (18.4°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, 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 Chappells, during September, the rain falls for 11.4 days and regularly aggregates up to 1.5" (38mm) of precipitation.

When it does not snow in Chappells?

April through December are months without snowfall.

How many hours of daylight does Chappells have in September?

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

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 7:01 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:12 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.5h.

What is the UV index intensity in September?

In Chappells, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
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
Chappells, SC

Average temperature in September - Chappells, 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
Chappells, SC

Average pressure in September - Chappells, 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
Chappells, SC

Average wind speed in September - Chappells, 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
Chappells, SC

Average humidity in September - Chappells, 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
Chappells, SC

Average rainfall in September - Chappells, 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
Chappells, SC

Average rainfall days in September - Chappells, 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
Chappells, SC

Average snowfall in September - Chappells, 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
Chappells, SC

Average snowfall days in September - Chappells, 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
Chappells, SC

Average daylight in September / Average sunshine in September - Chappells, 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
Chappells, SC

Average sunshine days in September - Chappells, 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
Chappells, SC

Average UV index in September - Chappells, 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
Chappells, SC

Average cloud cover in September - Chappells, 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
Chappells, SC

Average visibility in September - Chappells, 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).

Chappells, South Carolina, USA

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