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 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
A minor adjustment in Wheaton's average high-temperature is noted with the start of September, touching a warm 85.3°F (29.6°C) from August's 89.8°F (32.1°C). Wheaton's temperature drops to an average low of 69.1°F (20.6°C) during the nights of September.Heat index
In September, the heat index is evaluated at a very hot 96.8°F (36°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.When assessing, remember that heat index measurements are for light winds and shaded spots. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.
Humidity
The months with the highest humidity are August, September and December, with an average relative humidity of 77%.Rainfall
In September, the rain falls for 11.6 days. Throughout September, 0.59" (15mm) of precipitation is accumulated. Throughout the year, there are 115.3 rainfall days, and 10.35" (263mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
In Wheaton, the average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 7:05 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:14 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 6 suggests this advice:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
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 in Wheaton?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Wheaton have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Wheaton, GA
- Average high temperature in September: 85.3°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 (57.7°F).
- Average low temperature in September: 69.1°F
The month with the highest average low temperature is August (73.6°F).
The coldest month (with the lowest average low temperature) is January (41°F).
Average pressure in September
Wheaton, GA
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in September
Wheaton, GA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Wheaton, GA
- Average humidity in September: 77%
The months with the highest relative humidity are August, September and December (77%).
The months with the lowest relative humidity are January and November (72%).
Average rainfall in September
Wheaton, GA
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is August (1.54").
The driest months (with the least rainfall) are January and November (0.47").
Average rainfall days in September
Wheaton, GA
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is August (15.9 days).
The month with the least rainy days is November (4.9 days).
Average snowfall days in September
Wheaton, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Wheaton, GA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 4min
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 24min).
Average sunshine days in September
Wheaton, GA
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is November (23.5 days).
The month with the least sunshine days is August (9.3 days).
Average UV index in September
Wheaton, GA
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Wheaton, GA
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in September
Wheaton, GA
- 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).
Wheaton, Georgia, USA
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