September weather forecast
Rock Branch North, SC

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Weather in September

The first month of the autumn, September, is still a warm month in Rock Branch North, South Carolina, with an average temperature fluctuating between 66.2°F (19°C) and 83.8°F (28.8°C).

Temperature

In the transition from August to September, Rock Branch North reports an average high-temperature of a warm 83.8°F (28.8°C), indicating a close resemblance to the prior month. In September, Rock Branch North encounters an average low-temperature of 66.2°F (19°C) during the night.

Heat index

September's heat index is calculated to be a hot 91.4°F (33°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Heat index determinations are made taking into account the shade and light air movements. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.

Humidity

In Rock Branch North, the average relative humidity in September is 74%.

Rainfall

In Rock Branch North, in September, it is raining for 13.7 days, with typically 2.24" (57mm) of accumulated precipitation. Throughout the year, there are 157 rainfall days, and 31.54" (801mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 6:57 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

In September, the average sunshine is 8.9h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 6 in September translates into this advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Updated: Jul 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during September?

The high-temperature, in September, in Rock Branch North, records 83.8°F (28.8°C), while the low-temperature is 66.2°F (19°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 91.4°F (33°C).

What is the average humidity in September?

In September, the average relative humidity is 74%.

How much does it rain in Rock Branch North in September?

In Rock Branch North, in September, during 13.7 rainfall days, 2.24" (57mm) of precipitation is typically accumulated.

When it does not snow?

In Rock Branch North, snow does not fall in April through October.

What is the average length of the day in September?

In Rock Branch North, the average day length in September is 12h and 23min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:57 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 is 8.9h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high hazard to health 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
Rock Branch North, SC

Average temperature in September - Rock Branch North, 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
Rock Branch North, SC

Average pressure in September - Rock Branch North, 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
Rock Branch North, SC

Average wind speed in September - Rock Branch North, 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
Rock Branch North, SC

Average humidity in September - Rock Branch North, 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
Rock Branch North, SC

Average rainfall in September - Rock Branch North, 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
Rock Branch North, SC

Average rainfall days in September - Rock Branch North, 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
Rock Branch North, SC

Average snowfall in September - Rock Branch North, 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
Rock Branch North, SC

Average snowfall days in September - Rock Branch North, 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
Rock Branch North, SC

Average daylight in September / Average sunshine in September - Rock Branch North, 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
Rock Branch North, SC

Average sunshine days in September - Rock Branch North, 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
Rock Branch North, SC

Average UV index in September - Rock Branch North, 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
Rock Branch North, SC

Average cloud cover in September - Rock Branch North, 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
Rock Branch North, SC

Average visibility in September - Rock Branch North, 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).

Rock Branch North, South Carolina, USA

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