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
September's advent presents an average high-temperature of a warm 83.3°F (28.5°C), indicating a slight variation from the conditions of the previous month. The average temperature during September nights dips to a refreshing 66.4°F (19.1°C).Heat index
For most parts of September, the heat index is evaluated at a hot 91.4°F (33°C). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.The metrics for the heat index are tailored for both shady environments and light winds. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Humidity
The months with the highest humidity are May, June, August and September, with an average relative humidity of 78%.Rainfall
In September, the rain falls for 15.2 days. Throughout September, 3.03" (77mm) of precipitation is accumulated. Throughout the year, there are 167.8 rainfall days, and 32.68" (830mm) of precipitation is accumulated.Snowfall
In Marietta, snow does not fall in April through November.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:50 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 7:01 pm EDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In Marietta, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What are the most humid months?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Marietta have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Marietta have in September?
What is the UV index intensity in September?
Average temperature in September
Marietta, NC
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (52.3°F).
- Average low temperature in September: 66.4°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 (36.7°F).
Average pressure in September
Marietta, NC
- 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 (29.96"Hg).
Average wind speed in September
Marietta, NC
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Marietta, NC
- Average humidity in September: 78%
The months with the highest relative humidity are May, June, August and September (78%).
The month with the lowest relative humidity is January (73%).
Average rainfall in September
Marietta, NC
- Average rainfall in September: 3.03"
The wettest month (with the highest rainfall) is August (3.74").
The driest month (with the least rainfall) is January (1.5").
Average rainfall days in September
Marietta, NC
- Average rainfall days in September: 15.2 days
The month with the highest number of rainy days is July (20.2 days).
The month with the least rainy days is October (8.5 days).
Average snowfall in September
Marietta, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.39").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Marietta, NC
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Marietta, NC
- 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: 9h and 54min).
- Average sunshine in September: 9h and 2min
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
Marietta, NC
- Average sunshine days in September: 12.7 days
The month with the most sunshine days is October (21 days).
The month with the least sunshine days is July (8.2 days).
Average UV index in September
Marietta, NC
- 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
Marietta, NC
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in September
Marietta, 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).
Marietta, North Carolina, USA
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