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 coincides with an average high-temperature of a warm 82.9°F (28.3°C), indicating a minimal shift from August's 87.6°F (30.9°C). During September, the temperature tends to dip to an average of 66°F (18.9°C) at night.Heat index
The heat index for September is appraised at a hot 91.4°F (33°C). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.The heat index's values are generally associated with conditions in shade and light breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. 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
May and September, with an average relative humidity of 78%, are the most humid months.Rainfall
In Dillon, in September, it is raining for 14 days, with typically 2.83" (72mm) of accumulated precipitation. Throughout the year, there are 159.1 rainfall days, and 32.17" (817mm) of precipitation is accumulated.Snowfall
In Dillon, snow does not fall in April through November.Daylight
In September, the average length of the day is 12h and 23min.On the first day of the month, sunrise is at 6:51 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:11 am and sunset at 7:02 pm EDT.
Sunshine
The average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily UV index of 6 turns into the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the most humid month?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Dillon, SC
- Average high temperature in September: 82.9°F
The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (52.2°F).
- Average low temperature in September: 66°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (36.1°F).
Average pressure in September
Dillon, SC
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Dillon, SC
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Dillon, SC
- Average humidity in September: 78%
The months with the highest relative humidity are May and September (78%).
The months with the lowest relative humidity are January and November (73%).
Average rainfall in September
Dillon, SC
- Average rainfall in September: 2.83"
The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is January (1.54").
Average rainfall days in September
Dillon, SC
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is October (7.8 days).
Average snowfall in September
Dillon, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.02").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Dillon, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 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
Dillon, 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: 9h and 1min
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 30min).
Average sunshine days in September
Dillon, SC
- Average sunshine days in September: 13.7 days
The month with the most sunshine days is October (21.6 days).
The month with the least sunshine days is July (9.6 days).
Average UV index in September
Dillon, 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
Dillon, SC
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 30).
Average visibility in September
Dillon, 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).
Dillon, South Carolina, USA
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