September weather forecastShannon Hill, SC
September
Weather in September
September, the first month of the autumn in Shannon Hill, is still a warm month, with an average temperature varying between 66.2°F (19°C) and 83.3°F (28.5°C).Temperature
At the onset of September, Shannon Hill records an average high-temperature of a moderately hot 83.3°F (28.5°C), showing little deviation from the preceding month. The average low-temperature of 66.2°F (19°C) is witnessed during September.Heat index
The heat index value for September is estimated at a tropical 91.4°F (33°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.Note that heat index values are valued for light wind and location in the shade. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', arises from combining readings of air temperature and relative moisture content. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
May and September, with an average relative humidity of 76%, are the most humid months.Rainfall
In Shannon Hill, during September, the rain falls for 14.5 days and regularly aggregates up to 2.52" (64mm) of precipitation. In Shannon Hill, during the entire year, the rain falls for 158.4 days and collects up to 31.38" (797mm) of precipitation.Snowfall
In Shannon Hill, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September, sunrise is at 6:54 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:05 pm EDT.
Sunshine
The average sunshine in September is 9.1h.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 radiation for the average person.Note: The daily high UV index of 6 in September translates into this advice:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Shannon Hill, SC
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is July (90.1°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 (72.7°F).
The coldest month (with the lowest average low temperature) is January (37°F).
Average pressure in September
Shannon Hill, 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
Shannon Hill, SC
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Shannon Hill, SC
- Average humidity in September: 76%
The months with the highest relative humidity are May and September (76%).
The months with the lowest relative humidity are January, March and November (71%).
Average rainfall in September
Shannon Hill, SC
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is January (1.73").
Average rainfall days in September
Shannon Hill, SC
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is November (7.9 days).
Average snowfall in September
Shannon Hill, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Shannon Hill, SC
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.7 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
Shannon Hill, SC
- Average daylight in September: 12h and 24min
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: 9h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Shannon Hill, SC
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is October (21.6 days).
The month with the least sunshine days is August (9 days).
Average UV index in September
Shannon Hill, 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
Shannon Hill, SC
- Average cloud cover in September: 31
The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and October (Cloud cover 28).
Average visibility in September
Shannon 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).
