Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
During the shift to September, Tega Cay records a mild decrease in average high-temperature, moving from a hot 88.9°F (31.6°C) in August to a warm 83.3°F (28.5°C). Tega Cay's nights in September experience an average temperature drop to a refreshing 64°F (17.8°C).Heat index
The heat index value for September is computed to be a hot 89.6°F (32°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.Given the heat index, its values are aligned with shaded sites and gentle winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Humidity
In Tega Cay, the average relative humidity in September is 71%.Rainfall
September is the month with the least rainfall. Rain falls for 11.2 days and accumulates 1.97" (50mm) of precipitation.Snowfall
April through November are months without snowfall in Tega Cay.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:57 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:09 pm EDT.
Sunshine
In Tega Cay, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: An average maximum UV index of 5 in September leads to these recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. To protect against the Sun's most potent rays, avoid direct exposure around midday. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Tega Cay have in September?
What is the UV index intensity in September?
Average temperature in September
Tega Cay, 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).
Average pressure in September
Tega Cay, 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).
Average wind speed in September
Tega Cay, 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).
Average humidity in September
Tega Cay, 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%).
Average rainfall in September
Tega Cay, 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").
Average rainfall days in September
Tega Cay, 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).
Average snowfall in September
Tega Cay, 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").
Average snowfall days in September
Tega Cay, 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).
Average daylight in September /
Average sunshine in September
Tega Cay, 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 48min).
- Average sunshine in September: 8h and 4min
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).
Average sunshine days in September
Tega Cay, 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).
Average UV index in September
Tega Cay, 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).
Average cloud cover in September
Tega Cay, 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).
Average visibility in September
Tega Cay, 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).
Tega Cay, South Carolina, USA
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