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 shift from August to September is characterized by an average high-temperature of a still warm 77.9°F (25.5°C), not significantly different from the 82.9°F (28.3°C) of August. In the month of September, Sunset records a consistent average low-temperature of 57.4°F (14.1°C).Humidity
The average relative humidity in September is 76%.Rainfall
September is the month with the least rainfall. Rain falls for 15.5 days and accumulates 2.2" (56mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 7:04 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:16 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 5 during September translates into the following guidance:
Take necessary precautions - Defending against sun damage is advocated. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Sunset have in September?
What time 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
Sunset, SC
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (45.3°F).
- Average low temperature in September: 57.4°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).
Average pressure in September
Sunset, SC
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Sunset, SC
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in September
Sunset, SC
- Average humidity in September: 76%
The months with the highest relative humidity are May and December (77%).
The month with the lowest relative humidity is November (73%).
Average rainfall in September
Sunset, SC
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is December (4.53").
The driest month (with the least rainfall) is September (2.2").
Average rainfall days in September
Sunset, SC
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is July (20.8 days).
The month with the least rainy days is November (9.9 days).
Average snowfall in September
Sunset, SC
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.57").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Sunset, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sunset, 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 54min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Sunset, SC
- Average sunshine days in September: 11.8 days
The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is July (7.5 days).
Average UV index in September
Sunset, SC
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Sunset, SC
- Average cloud cover in September: 33
The months with the most cloud cover are February, March and December (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Sunset, SC
- Average visibility in September: 5mi
The months with the highest visibility are February, June, July, August, October and November (6mi).
The months with the lowest visibility are January, March, April, May, September and December (5mi).
Sunset, South Carolina, USA
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