September weather forecastWallace, SC
September
Weather in September
The first month of the autumn, September, is still a warm month in Wallace, South Carolina, with an average temperature fluctuating between 65.5°F (18.6°C) and 83.3°F (28.5°C).Temperature
Wallace's shift from August to September is accompanied by an average high-temperature of a warm 83.3°F (28.5°C), a slight deviation from 88.3°F (31.3°C). During the month of September, the nighttime temperature falls to an average of 65.5°F (18.6°C).Heat index
The heat index value during September is appraised at a tropical 89.6°F (32°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.For clarity, heat index numbers account for light winds and areas under shade. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are quite important for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
May, September and December, with an average relative humidity of 75%, are the most humid months.Rainfall
In Wallace, in September, during 13.8 rainfall days, 2.95" (75mm) of precipitation is typically accumulated. In Wallace, during the entire year, the rain falls for 159.8 days and collects up to 32.36" (822mm) of precipitation.Snowfall
In Wallace, South Carolina, snow does not fall in April through October.Daylight
In Wallace, South Carolina, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:52 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:04 pm EDT.
Sunshine
In Wallace, South Carolina, the average sunshine in September is 9.2h.UV index
In Wallace, South Carolina, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The average daily UV index of 6 in September transforms into the following instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Wallace, SC
- Average high temperature in September: 83.3°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 (50.9°F).
- Average low temperature in September: 65.5°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 (35.8°F).
Average pressure in September
Wallace, SC
- Average pressure in September: 30.02"Hg
The months with the highest atmospheric pressure are January, November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Wallace, SC
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Wallace, SC
- Average humidity in September: 75%
The months with the highest relative humidity are May, September and December (75%).
The months with the lowest relative humidity are January, March, July and November (72%).
Average rainfall in September
Wallace, SC
- Average rainfall in September: 2.95"
The wettest month (with the highest rainfall) is August (3.62").
The driest month (with the least rainfall) is January (1.81").
Average rainfall days in September
Wallace, SC
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is November (8.2 days).
Average snowfall in September
Wallace, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Wallace, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.1 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
Wallace, SC
- Average daylight in September: 12h and 24min
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 12min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in September
Wallace, SC
- Average sunshine days in September: 14 days
The month with the most sunshine days is November (21.2 days).
The months with the least sunshine days are July and August (9.9 days).
Average UV index in September
Wallace, 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
Wallace, SC
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 41).
The months with the least cloud cover are June and October (Cloud cover 29).
Average visibility in September
Wallace, 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).
