September weather forecastWinston-Salem, NC
September
Weather in September
September in Winston-Salem witnesses a mixture of summer's end and the onset of autumn. With a noticeable dip in temperatures down to 81°F (27.2°C), the days become cooler and more comfortable. Rainfall also sees a further decline, marking one of the dry periods in the city. Humidity levels fluctuate incredibly during this time, adding to the transitional nature of this month. The decrease in daylight hours and the temperature drop signal the approaching winter, preparing the city for the cooler season.Temperature
Winston-Salem's progression into September involves a minor drop in the average high-temperature, slightly receding from a hot 87.4°F (30.8°C) in August to a moderately hot 81°F (27.2°C). Winston-Salem's average low-temperature is measured at an enjoyable 61.3°F (16.3°C) during September.Heat index
The heat index value for September is appraised at a hot 86°F (30°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.Realize that the values for the heat index are set for shaded places and light winds. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Humidity
In Winston-Salem, the average relative humidity in September is 74%.Rainfall
In Winston-Salem, in September, during 13.3 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. Throughout the year, there are 159 rainfall days, and 30.83" (783mm) of precipitation is accumulated.Snowfall
In Winston-Salem, snow does not fall in April through October.Daylight
In Winston-Salem, the average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 6:53 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:05 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In September, the UV index of 5 transforms into the following advice:
Be vigilant - Suggestions to stave off sun damage are provided. Around midday, solar radiation is most harmful; hence, exposure should be limited. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Winston-Salem, NC
- Average high temperature in September: 81°F
The warmest month (with the highest average high temperature) is July (89.8°F).
The month with the lowest average high temperature is January (45.9°F).
- Average low temperature in September: 61.3°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).
Average pressure in September
Winston-Salem, NC
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Winston-Salem, NC
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Winston-Salem, NC
- Average humidity in September: 74%
The months with the highest relative humidity are May and December (75%).
The month with the lowest relative humidity is July (69%).
Average rainfall in September
Winston-Salem, NC
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is October (2.05").
Average rainfall days in September
Winston-Salem, NC
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (9.2 days).
Average snowfall in September
Winston-Salem, NC
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.24").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Winston-Salem, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.7 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
Winston-Salem, NC
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Winston-Salem, NC
- Average sunshine days in September: 15 days
The months with the most sunshine days are October and November (19.7 days).
The month with the least sunshine days is July (11.1 days).
Average UV index in September
Winston-Salem, NC
- 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, February and December (UV index 2).
Average cloud cover in September
Winston-Salem, NC
- Average cloud cover in September: 35
The months with the most cloud cover are February and March (Cloud cover 42).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility in September
Winston-Salem, NC
- 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).
