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
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a tropical 89.6°F (32°C) in August to a moderately hot 84°F (28.9°C). Nightly temperatures drop to an average low of 65.5°F (18.6°C) in September.Heat index
In September, the average heat index is estimated at a tropical 91.4°F (33°C). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.One should consider that heat index numbers are for shaded settings and light wind. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Humidity
In Chamblee, the average relative humidity in September is 70%.Rainfall
In September, the rain falls for 13.5 days. Throughout September, 2.76" (70mm) of precipitation is accumulated. Throughout the year, there are 187.2 rainfall days, and 44.13" (1121mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September 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
In September, the average sunshine is 8.6h.UV index
In Chamblee, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Act with care - The need to guard against sun damage is communicated. Direct Sun exposure should be minimized especially during midday when radiation is most intense. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during 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?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Chamblee, GA
- Average high temperature in September: 84°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (49.8°F).
- Average low temperature in September: 65.5°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 (34.3°F).
Average pressure in September
Chamblee, 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
Chamblee, 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 (4.5mph).
Average humidity in September
Chamblee, GA
- Average humidity in September: 70%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (68%).
Average rainfall in September
Chamblee, GA
- Average rainfall in September: 2.76"
The wettest month (with the highest rainfall) is August (5.63").
The driest month (with the least rainfall) is October (2.28").
Average rainfall days in September
Chamblee, GA
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (21.6 days).
The month with the least rainy days is October (10.4 days).
Average snowfall in September
Chamblee, GA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Chamblee, 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
Chamblee, 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 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Chamblee, GA
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (6.9 days).
Average UV index in September
Chamblee, GA
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Chamblee, GA
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Chamblee, 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).
Chamblee, Georgia, USA
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