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 is marked by a minor reduction in average high-temperature, sliding from a tropical 87.6°F (30.9°C) in August to a moderately hot 82.2°F (27.9°C). West Union witnesses a consistent average low-temperature of 61.7°F (16.5°C) throughout September.Heat index
The heat index value during September is evaluated at a tropical 87.8°F (31°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', blends air temperature and moisture content to represent the felt temperature to humans. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
The average relative humidity in September is 73%.Rainfall
The month with the least rainfall in West Union is September, when the rain falls for 12.2 days and typically collects 1.77" (45mm) of precipitation.Snowfall
In West Union, snow does not fall in April through November.Daylight
In West Union, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 7:05 am and sunset at 7:58 pm. On the last day of September, sunrise is at 7:26 am and sunset at 7:17 pm EDT.
Sunshine
In West Union, the average sunshine in September is 8.7h.UV index
In West Union, South Carolina, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The Sun's radiation is especially intense around midday; try to stay in shade during this period. 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
What is the temperature in September in West Union?
What is the average humidity in September in West Union?
What is the driest month in West Union?
How much does it rain in West Union in September?
When it does not snow in West Union?
How many hours of daylight does West Union have in September?
When are sunrise and sunset in September in West Union?
How many hours of sunshine does West Union have in September?
What is the UV index intensity in September in West Union?
Average temperature in September
West Union, SC
- Average high temperature in September: 82.2°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (48.7°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).
Average pressure in September
West Union, SC
- Average pressure in September: 30.03"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
West Union, SC
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is February (6.1mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
West Union, SC
- Average humidity in September: 73%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (71%).
Average rainfall in September
West Union, SC
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
West Union, SC
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is October (8.5 days).
Average snowfall in September
West Union, SC
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.28").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
West Union, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1 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
West Union, 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 4min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
West Union, SC
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is October (21.4 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in September
West Union, SC
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
West Union, SC
- Average cloud cover in September: 30
The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and July (Cloud cover 27).
Average visibility in September
West Union, SC
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
West Union, South Carolina, USA
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