September weather forecast
Welcome, SC

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Weather in September

September, the first month of the autumn in Welcome, is still a warm month, with an average temperature varying between 82.8°F (28.2°C) and 63°F (17.2°C).

Temperature

With the beginning of September, the average high-temperature shows a small decrease, transitioning from a tropical 88.3°F (31.3°C) in August to a moderately hot 82.8°F (28.2°C). Welcome experiences a nighttime temperature average of 63°F (17.2°C) during September.

Heat index

Throughout September, the heat index is calculated to be a hot 87.8°F (31°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.

Humidity

In September, the average relative humidity is 72%.

Rainfall

The month with the least rainfall is September, when the rain falls for 10.3 days and typically collects 0.71" (18mm) of precipitation.

Snowfall

In Welcome, snow does not fall in April through November.

Daylight

In September, the average length of the day is 12h and 23min.
On the first day of September, sunrise is at 7:03 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:14 pm EDT.

Sunshine

In Welcome, the average sunshine in September is 8.7h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum UV index, 5 during September, leads to the following recommendations:
Exercise prevention - Warding off sunburn is urged. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Updated: Jun 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

In Welcome, in September, the average high-temperature is 82.8°F (28.2°C), and the average low-temperature is 63°F (17.2°C). The average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in September is calculated to be 87.8°F (31°C).

What is the average humidity in September in Welcome?

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

What is the driest month?

September is the month with the least rainfall. Rain falls for 10.3 days and accumulates 0.71" (18mm) of precipitation.

How many days does it rain in September?

In Welcome, during September, the rain falls for 10.3 days and regularly aggregates up to 0.71" (18mm) of precipitation.

When it does not snow?

In Welcome, South Carolina, snow does not fall in April through November.

What is the average length of the day in September?

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

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 7:03 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:14 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.7h.

How high is the UV index in September?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe 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
Welcome, SC

Average temperature in September - Welcome, SC
  • Average high temperature in September: 82.8°F

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (49.6°F).

  • Average low temperature in September: 63°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (33.8°F).

Average pressure in September
Welcome, SC

Average pressure in September - Welcome, SC
  • Average pressure in September: 30.03"Hg

The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

Average wind speed in September
Welcome, SC

Average wind speed in September - Welcome, SC
  • Average wind speed in September: 4.8mph

The windiest months (with the highest average wind speed) are February and April (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

Average humidity in September
Welcome, SC

Average humidity in September - Welcome, 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
Welcome, SC

Average rainfall in September - Welcome, SC
  • Average rainfall in September: 0.71"

The wettest month (with the highest rainfall) is August (2.01").
The driest month (with the least rainfall) is September (0.71").

Average rainfall days in September
Welcome, SC

Average rainfall days in September - Welcome, SC
  • Average rainfall days in September: 10.3 days

The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is October (6.5 days).

Average snowfall in September
Welcome, SC

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

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

Average snowfall days in September
Welcome, SC

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

The months with the highest number of snowfall days are January and February (0.8 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
Welcome, SC

Average daylight in September / Average sunshine in September - Welcome, SC
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

Average sunshine days in September
Welcome, SC

Average sunshine days in September - Welcome, SC
  • Average sunshine days in September: 16.6 days

The month with the most sunshine days is October (22.3 days).
The month with the least sunshine days is July (11.5 days).

Average UV index in September
Welcome, SC

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

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

Average cloud cover in September
Welcome, SC

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

The month with the most cloud cover is February (Cloud cover 42).
The months with the least cloud cover are June and July (Cloud cover 27).

Average visibility in September
Welcome, SC

Average visibility in September - Welcome, 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).

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