September weather forecast
Thunderwoods, SC

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Weather in September

September, the first month of the autumn in Thunderwoods, is also a moderately hot month, with an average temperature varying between 83.8°F (28.8°C) and 66.2°F (19°C).

Temperature

In September, the average high-temperature registers at a warm 83.8°F (28.8°C), nearly identical to August's 88.9°F (31.6°C). Throughout September, Thunderwoods anticipates an average low-temperature of 66.2°F (19°C).

Heat index

September's mean heat index is estimated at a tropical 91.4°F (33°C). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Consider that heat index readings are for situations in the shade and light wind. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', arises from combining readings of air temperature and relative moisture content. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.

Humidity

In September, the average relative humidity is 74%.

Rainfall

In September, the rain falls for 13.7 days. Throughout September, 2.24" (57mm) of precipitation is accumulated. In Thunderwoods, during the entire year, the rain falls for 157 days and collects up to 31.54" (801mm) of precipitation.

Snowfall

In Thunderwoods, South Carolina, snow does not fall in April through October.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 6:56 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:08 pm EDT.

Sunshine

The average sunshine in September is 8.9h.

UV index

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: In September, the maximum UV index of 6 transforms into these recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Updated: Aug 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September?

In September, the average high-temperature and low-temperature in Thunderwoods are 83.8°F (28.8°C) and 66.2°F (19°C) respectively. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in September is estimated at 91.4°F (33°C).

What is the average humidity in September in Thunderwoods?

The average relative humidity in September is 74%.

How much does it rain in September?

In Thunderwoods, during September, the rain falls for 13.7 days and regularly aggregates up to 2.24" (57mm) of precipitation.

When it does not snow?

In Thunderwoods, snow does not fall in April through October.

What is the average length of the day in September?

In Thunderwoods, the average day length in September is 12h and 23min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:56 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:08 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration in Thunderwoods is 8.9h.

How high is the UV index in September?

In Thunderwoods, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's 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
Thunderwoods, SC

Average temperature in September - Thunderwoods, SC
  • Average high temperature in September: 83.8°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (52.2°F).

  • Average low temperature in September: 66.2°F

The month with the highest average low temperature is July (72.5°F).
The coldest month (with the lowest average low temperature) is January (37.6°F).

Average pressure in September
Thunderwoods, SC

Average pressure in September - Thunderwoods, SC
  • Average pressure in September: 30.01"Hg

The months with the highest atmospheric pressure are January, November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

Average wind speed in September
Thunderwoods, SC

Average wind speed in September - Thunderwoods, SC
  • Average wind speed in September: 6mph

The windiest months (with the highest average wind speed) are February and April (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in September
Thunderwoods, SC

Average humidity in September - Thunderwoods, SC
  • Average humidity in September: 74%

The month with the highest relative humidity is May (75%).
The months with the lowest relative humidity are January and November (70%).

Average rainfall in September
Thunderwoods, SC

Average rainfall in September - Thunderwoods, SC
  • Average rainfall in September: 2.24"

The wettest month (with the highest rainfall) is August (3.66").
The driest months (with the least rainfall) are January and November (1.97").

Average rainfall days in September
Thunderwoods, SC

Average rainfall days in September - Thunderwoods, SC
  • Average rainfall days in September: 13.7 days

The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is October (8.2 days).

Average snowfall in September
Thunderwoods, SC

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

The month with the highest snowfall is February (0.31").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Thunderwoods, SC

Average snowfall days in September - Thunderwoods, 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 and October (0 days).

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

Average daylight in September / Average sunshine in September - Thunderwoods, 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 5min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

Average sunshine days in September
Thunderwoods, SC

Average sunshine days in September - Thunderwoods, SC
  • Average sunshine days in September: 13.8 days

The month with the most sunshine days is October (21.8 days).
The month with the least sunshine days is July (8.9 days).

Average UV index in September
Thunderwoods, SC

Average UV index in September - Thunderwoods, SC
  • Average UV index in September: 6

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

Average cloud cover in September
Thunderwoods, SC

Average cloud cover in September - Thunderwoods, SC
  • Average cloud cover in September: 30

The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 27).

Average visibility in September
Thunderwoods, SC

Average visibility in September - Thunderwoods, 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).

Thunderwoods, South Carolina, USA

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