September weather forecast
Rock Hill, SC

This iconic arc within the Fountain Park in Rock Hill, South Carolina, is a major tourist spot in the city and has been set in a scenic natural park garden
This iconic arc within the Fountain Park in Rock Hill, South Carolina, is a major tourist spot in the city and has been set in a scenic natural park garden

Weather in September

September, the first month of the autumn in Rock Hill, is still a warm month, with an average temperature fluctuating between 64°F (17.8°C) and 83.3°F (28.5°C).

Temperature

In September, the average high-temperature marginally drops from a tropical 88.9°F (31.6°C) in August to a warm 83.3°F (28.5°C). In September, the average low-temperature is 64°F (17.8°C).

Heat index

The average heat index in September is calculated to be a tropical 89.6°F (32°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like pregnancy, differences in body mass, height, and shape, wind, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in September in Rock Hill is 71%.

Rainfall

September is the month with the least rainfall in Rock Hill, South Carolina. Rain falls for 11.2 days and accumulates 1.97" (50mm) of precipitation.

Snowfall

April through November are months without snowfall.

Daylight

The average length of the day in September in Rock Hill is 12h and 23min.
On the first day of September, sunrise is at 6:57 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:09 pm EDT.

Sunshine

The average sunshine in September is 8.6h.

UV index

In Rock Hill, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Rock Hill?

The average high-temperature, in September, in Rock Hill, is 83.3°F (28.5°C), while the average low-temperature is 64°F (17.8°C). in September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is calculated to be 89.6°F (32°C).

What is the average humidity in September in Rock Hill?

In Rock Hill, South Carolina, the average relative humidity in September is 71%.

What is the driest month in Rock Hill?

September is the month with the least rainfall in Rock Hill. Rain falls for 11.2 days and accumulates 1.97" (50mm) of precipitation.

How much does it rain in Rock Hill in September?

In Rock Hill, South Carolina, during September, the rain falls for 11.2 days and regularly aggregates up to 1.97" (50mm) of precipitation.

When it does not snow in Rock Hill?

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

What is the average length of the day in September in Rock Hill?

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

When are sunrise and sunset in September in Rock Hill?

In September, on the first day of the month, sunrise is at 6:57 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:09 pm EDT.

How many hours of sunshine does Rock Hill have in September?

The average sunshine duration in September is 8.6h.

How high is the UV index in September in Rock Hill?

In September, the average daily maximum UV index in Rock Hill, South Carolina, is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Rock Hill, SC

Average temperature in September - Rock Hill, SC
  • Average high temperature in September: 83.3°F

The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is January (49.6°F).

  • Average low temperature in September: 64°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (34.2°F).

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Average pressure in September
Rock Hill, SC

Average pressure in September - Rock Hill, SC
  • Average pressure in September: 30.03"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).

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Average wind speed in September
Rock Hill, SC

Average wind speed in September - Rock Hill, SC
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is April (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in September
Rock Hill, SC

Average humidity in September - Rock Hill, SC
  • Average humidity in September: 71%

The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is July (69%).

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Average rainfall in September
Rock Hill, SC

Average rainfall in September - Rock Hill, SC
  • Average rainfall in September: 1.97"

The wettest month (with the highest rainfall) is December (3.46").
The driest month (with the least rainfall) is September (1.97").

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Average rainfall days in September
Rock Hill, SC

Average rainfall days in September - Rock Hill, SC
  • Average rainfall days in September: 11.2 days

The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is November (9.6 days).

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Average snowfall in September
Rock Hill, SC

Average snowfall in September - Rock Hill, SC
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.34").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
Rock Hill, SC

Average snowfall days in September - Rock Hill, SC
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in September /
Average sunshine in September
Rock Hill, SC

Average daylight in September / Average sunshine in September - Rock Hill, SC
  • Average daylight in September: 12h and 23min

The month with the longest days is June (Average daylight: 14h and 28min).
The month with the shortest days is December (Average daylight: 9h and 52min).

  • Average sunshine in September: 8h and 36min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

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Average sunshine days in September
Rock Hill, SC

Average sunshine days in September - Rock Hill, SC
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is October (20.3 days).
The month with the least sunshine days is July (10.8 days).

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Average UV index in September
Rock Hill, SC

Average UV index in September - Rock Hill, SC
  • Average UV index in September: 5

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

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Average cloud cover in September
Rock Hill, SC

Average cloud cover in September - Rock Hill, SC
  • Average cloud cover in September: 34

The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is June (Cloud cover 30).

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Average visibility in September
Rock Hill, SC

Average visibility in September - Rock Hill, 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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