September weather forecastKennesaw, GA
September
Weather in September
The transition from August to September marks the commencement of the autumn season in Kennesaw. A noticeable drop in the average temperatures compared to August characteristics defines September’s weather. Rainfall is less frequent, with September recording 2.99" (76mm). The shorter daylight hours and reduced sunshine hours imply the start of shorter days. Coupled with the gradual drop in temperature, these factors collectively herald the arrival of autumn.Temperature
September in Kennesaw is characterized by a slight reduction in average high-temperature, easing from a tropical 89.1°F (31.7°C) in August to a warm 83.7°F (28.7°C). Throughout the month of September, Kennesaw observes an average nighttime temperature of 64.9°F (18.3°C).Heat index
Throughout September, the heat index is estimated at a tropical 89.6°F (32°C). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
In Kennesaw, the average relative humidity in September is 71%.Rainfall
In Kennesaw, in September, it is raining for 13.5 days, with typically 2.99" (76mm) of accumulated precipitation. Throughout the year, in Kennesaw, there are 186.9 rainfall days, and 45.59" (1158mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Kennesaw is 12h and 22min.On the first day of the month, sunrise is at 7:12 am and sunset at 8:03 pm. On the last day of September, sunrise is at 7:32 am and sunset at 7:23 pm EDT.
Sunshine
The average sunshine in September is 8.4h.UV index
In Kennesaw, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: A daily high UV index of 5 in September leads to these guidelines:
Guard yourself - An obligation to protect skin and eyes from harm exists. Around midday, solar radiation is most harmful; hence, exposure should be limited. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Kennesaw, GA
- Average high temperature in September: 83.7°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (49.1°F).
- Average low temperature in September: 64.9°F
The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is January (33.6°F).
Average pressure in September
Kennesaw, GA
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Kennesaw, GA
- Average wind speed in September: 4.8mph
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
Kennesaw, GA
- Average humidity in September: 71%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are July and August (70%).
Average rainfall in September
Kennesaw, GA
- Average rainfall in September: 2.99"
The wettest month (with the highest rainfall) is August (5.47").
The driest month (with the least rainfall) is October (2.44").
Average rainfall days in September
Kennesaw, GA
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (21.8 days).
The month with the least rainy days is November (10.2 days).
Average snowfall in September
Kennesaw, GA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Kennesaw, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.6 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
Kennesaw, GA
- Average daylight in September: 12h and 24min
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 24min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Kennesaw, GA
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is July (8.1 days).
Average UV index in September
Kennesaw, GA
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Kennesaw, GA
- Average cloud cover in September: 32
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Kennesaw, 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).
