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
The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's hot 90.5°F (32.5°C) to a warm 85.1°F (29.5°C). Throughout September, an average nighttime temperature of 64.8°F (18.2°C) is experienced.Heat index
For September, the heat index is estimated at a hot 93.2°F (34°C). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.Observations indicate that the heat index values are for shady locations with light wind. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Humidity
The average relative humidity in September in Glymphville is 72%.Rainfall
The month with the least rainfall in Glymphville is September, when the rain falls for 10.4 days and typically collects 1.42" (36mm) of precipitation.Snowfall
In Glymphville, snow does not fall in April through November.Daylight
In Glymphville, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:59 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:10 pm EDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
In Glymphville, South Carolina, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it 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?
When is the sunrise / sunset in September?
How long on average sun shines in September in Glymphville?
How high is the UV index in September?
Average temperature in September
Glymphville, SC
- Average high temperature in September: 85.1°F
The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is January (51.4°F).
- Average low temperature in September: 64.8°F
The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is January (35.1°F).
Average pressure in September
Glymphville, 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
Glymphville, SC
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Glymphville, 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
Glymphville, SC
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is December (3.23").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in September
Glymphville, SC
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is October (8.8 days).
Average snowfall in September
Glymphville, SC
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.79").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Glymphville, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.9 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
Glymphville, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Glymphville, SC
- Average sunshine days in September: 18 days
The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is July (12.6 days).
Average UV index in September
Glymphville, SC
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Glymphville, SC
- Average cloud cover in September: 32
The months with the most cloud cover are February and December (Cloud cover 43).
The months with the least cloud cover are June, July and October (Cloud cover 30).
Average visibility in September
Glymphville, 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).
Glymphville, South Carolina, USA
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