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
Dunwoody, Georgia, records a mild change in average high-temperature during September, easing from a hot 89.6°F (32°C) in August to a warm 84°F (28.9°C). In Dunwoody, the average nighttime temperature during September is a refreshing 65.5°F (18.6°C).Heat index
The heat index in September is calculated to be a hot 89.6°F (32°C). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', evaluates the perceived heat by adding the effect of moisture in the air. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Humidity
The average relative humidity in September is 69%.Rainfall
In Dunwoody, in September, it is raining for 12.3 days, with typically 2.56" (65mm) of accumulated precipitation. In Dunwoody, during the entire year, the rain falls for 180.4 days and collects up to 42.91" (1090mm) of precipitation.Snowfall
In Dunwoody, Georgia, snow does not fall in April through October.Daylight
The average length of the day in September in Dunwoody, Georgia, is 12h and 22min.On the first day of September, sunrise is at 7:11 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 7:22 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 5 translates into these guidelines:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Around midday, solar radiation is most harmful; hence, exposure should be limited. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Dunwoody in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September in Dunwoody?
How many hours of sunshine does Dunwoody have in September?
How high is the UV index in September?
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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