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 September, the average high-temperature is a warm 83.8°F (28.8°C), maintaining a close resemblance to that of the preceding month. Alcolu observes an average nighttime temperature of 67.1°F (19.5°C) during September.Heat index
In September, the average heat index is computed to be a hot 93.2°F (34°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.Heat index specifics point out values are for conditions of shade and a slight breeze. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', integrates the air's temperature and its humidity to showcase the felt temperature by people. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
In Alcolu, South Carolina, the average relative humidity in September is 77%.Rainfall
In Alcolu, during September, the rain falls for 13.9 days and regularly aggregates up to 2.44" (62mm) of precipitation. Throughout the year, there are 158.1 rainfall days, and 30.28" (769mm) of precipitation is accumulated.Snowfall
In Alcolu, snow does not fall in March through November.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:55 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:06 pm EDT.
Sunshine
In Alcolu, the average sunshine in September is 9h.UV index
The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 6 during September translates into these guidelines:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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?
How much does it rain in Alcolu 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?
What is the UV index intensity in September?
Average temperature in September
Alcolu, SC
- Average high temperature in September: 83.8°F
The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (53.6°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (38.1°F).
Average pressure in September
Alcolu, 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 (29.97"Hg).
Average wind speed in September
Alcolu, SC
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Alcolu, SC
- Average humidity in September: 77%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January and November (72%).
Average rainfall in September
Alcolu, SC
- Average rainfall in September: 2.44"
The wettest months (with the highest rainfall) are August and December (3.23").
The driest month (with the least rainfall) is January (1.65").
Average rainfall days in September
Alcolu, SC
- Average rainfall days in September: 13.9 days
The months with the highest number of rainy days are July and August (18.8 days).
The month with the least rainy days is November (8 days).
Average snowfall in September
Alcolu, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Alcolu, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.6 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Alcolu, 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: 10h and 0min).
- Average sunshine in September: 9h and 0min
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 36min).
Average sunshine days in September
Alcolu, SC
- Average sunshine days in September: 14 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (9.2 days).
Average UV index in September
Alcolu, SC
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Alcolu, SC
- Average cloud cover in September: 32
The months with the most cloud cover are February and December (Cloud cover 40).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in September
Alcolu, 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).
Alcolu, South Carolina, USA
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