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
The arrival of September corresponds with a light shift in temperature, down from a tropical 89.6°F (32°C) in August to a moderately hot 84°F (28.9°C). During September, Dunwoody records an average temperature of 65.5°F (18.6°C) at night.Heat index
The heat index value during September is appraised at a hot 89.6°F (32°C). If exposure and activity are sustained, they might cause a feeling of weariness, resulting in heat cramps.Heat index guidelines indicate values are for light wind scenarios and shaded regions. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
In September, the average relative humidity in Dunwoody is 69%.Rainfall
In Dunwoody, in September, during 12.3 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. Throughout the year, in Dunwoody, there are 180.4 rainfall days, and 42.91" (1090mm) of precipitation is accumulated.Snowfall
In Dunwoody, snow does not fall in April through October.Daylight
In September, the average length of the day in Dunwoody is 12h and 22min.On the first day of the month, sunrise is at 7:11 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:31 am and sunset at 7:22 pm EDT.
Sunshine
The average sunshine in September in Dunwoody, Georgia, is 8.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
How hot is September in Dunwoody?
What is the average humidity in September in Dunwoody?
How much does it rain in Dunwoody in September?
When it does not snow in Dunwoody?
What is the average length of the day in September in Dunwoody?
When are sunrise and sunset in September in Dunwoody?
How long on average sun shines in September in Dunwoody?
What is the UV index reading in September in Dunwoody?
Average temperature in September
Dunwoody, GA
- Average high temperature in September: 84°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (49.6°F).
- Average low temperature in September: 65.5°F
The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average pressure in September
Dunwoody, GA
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Dunwoody, GA
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Dunwoody, GA
- Average humidity in September: 69%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are July and August (68%).
Average rainfall in September
Dunwoody, GA
- Average rainfall in September: 2.56"
The wettest month (with the highest rainfall) is August (5.16").
The driest month (with the least rainfall) is October (2.17").
Average rainfall days in September
Dunwoody, GA
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is October (9.5 days).
Average snowfall in September
Dunwoody, GA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.14").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Dunwoody, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Dunwoody, GA
- 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: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Dunwoody, GA
- Average sunshine days in September: 16 days
The month with the most sunshine days is October (20.2 days).
The month with the least sunshine days is July (7.7 days).
Average UV index in September
Dunwoody, GA
- Average UV index in September: 5
The month with the highest UV index is August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Dunwoody, GA
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Dunwoody, 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).
Dunwoody, Georgia, USA
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