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
In September, Clayton experiences a minor shift in meteorological conditions with average high-temperatures marked at a warm 81.5°F (27.5°C), closely mirroring the climate in August. Throughout September, Clayton's nights cool down to an average of 64.9°F (18.3°C).Heat index
The heat index value during September is calculated to be a hot 87.8°F (31°C). If exposure and ongoing activity persist, they might induce a state of tiredness and heat cramps.Given the heat index, its values are aligned with shaded sites and gentle winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. 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 remain especially vital for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
May, August and September, with an average relative humidity of 77%, are the most humid months in Clayton.Rainfall
In Clayton, in September, it is raining for 11.2 days, with typically 1.18" (30mm) of accumulated precipitation. In Clayton, during the entire year, the rain falls for 131 days and collects up to 13.9" (353mm) of precipitation.Snowfall
In Clayton, snow does not fall in April through November.Daylight
In September, the average length of the day in Clayton is 12h and 23min.On the first day of the month, sunrise is at 6:46 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:58 pm EDT.
Sunshine
The average sunshine in September in Clayton is 9h.UV index
The average daily maximum UV index in September in Clayton is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The average daily UV index of 5 in September transforms into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Clayton?
What are the most humid months in Clayton?
What is the average humidity in September in Clayton?
How many days does it rain in September in Clayton?
When it does not snow in Clayton?
What is the average length of the day in September in Clayton?
What time are sunrise and sunset in September in Clayton?
How long on average sun shines in September in Clayton?
What is the UV index intensity in September in Clayton?
Average temperature in September
Clayton, NC
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (48.4°F).
- Average low temperature in September: 64.9°F
The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).
Average pressure in September
Clayton, NC
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Clayton, NC
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is April (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Clayton, NC
- Average humidity in September: 77%
The months with the highest relative humidity are May, August and September (77%).
The months with the lowest relative humidity are January, March and November (73%).
Average rainfall in September
Clayton, NC
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is August (1.89").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Clayton, NC
- Average rainfall days in September: 11.2 days
The months with the highest number of rainy days are July and August (15.3 days).
The month with the least rainy days is November (6.5 days).
Average snowfall in September
Clayton, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.47").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Clayton, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 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
Clayton, NC
- 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 48min).
- Average sunshine in September: 9h and 0min
The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Clayton, NC
- Average sunshine days in September: 17.4 days
The months with the most sunshine days are October and November (22.1 days).
The month with the least sunshine days is July (13.1 days).
Average UV index in September
Clayton, NC
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Clayton, NC
- Average cloud cover in September: 36
The months with the most cloud cover are February and March (Cloud cover 42).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Clayton, 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).
Clayton, North Carolina, USA
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