September weather forecastCobb, GA
September
Weather in September
September, the first month of the autumn in Cobb, is also a moderately hot month, with an average temperature fluctuating between 84.9°F (29.4°C) and 67.8°F (19.9°C).Temperature
The dawn of September sees an average high-temperature of a warm 84.9°F (29.4°C), subtly contrasting with August's 89.2°F (31.8°C). Cobb anticipates an average minimum temperature of 67.8°F (19.9°C) in the month of September.Heat index
Throughout September, the heat index is appraised at a very hot 95°F (35°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.Heat index readings emphasize conditions of light breezes and shaded spots. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. The body is at risk of dehydration and related complications when it fails to shed excessive heat.
Humidity
In September, the average relative humidity in Cobb is 75%.Rainfall
In Cobb, in September, it is raining for 14.2 days, with typically 2.13" (54mm) of accumulated precipitation. Throughout the year, in Cobb, there are 166.8 rainfall days, and 34.61" (879mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall in Cobb.Daylight
In September, the average length of the day in Cobb is 12h and 21min.On the first day of September in Cobb, Georgia, sunrise is at 7:11 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:21 pm EDT.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 6 during September leads to these advisories:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cobb, GA
- Average high temperature in September: 84.9°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 (56.8°F).
- Average low temperature in September: 67.8°F
The months with the highest average low temperature are July and August (72.9°F).
The coldest month (with the lowest average low temperature) is January (40.1°F).
Average pressure in September
Cobb, GA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in September
Cobb, GA
- Average wind speed in September: 6.3mph
The windiest months (with the highest average wind speed) are February and March (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in September
Cobb, GA
- Average humidity in September: 75%
The months with the highest relative humidity are August and December (76%).
The months with the lowest relative humidity are October and November (70%).
Average rainfall in September
Cobb, GA
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is December (3.82").
The driest month (with the least rainfall) is November (1.97").
Average rainfall days in September
Cobb, GA
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is August (22.1 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in September
Cobb, GA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Cobb, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Cobb, GA
- Average daylight in September: 12h and 24min
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 42min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Cobb, GA
- Average sunshine days in September: 12.6 days
The month with the most sunshine days is November (20.5 days).
The months with the least sunshine days are July and August (6.3 days).
Average UV index in September
Cobb, GA
- Average UV index in September: 6
The months with the highest UV index are May, June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Cobb, GA
- Average cloud cover in September: 30
The month with the most cloud cover is December (Cloud cover 41).
The months with the least cloud cover are May, June and October (Cloud cover 28).
Average visibility in September
Cobb, 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).
