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
With the arrival of September, Suwanee notices a mild change in the average high-temperature, sliding from August's tropical 88.5°F (31.4°C) to a warm 83.1°F (28.4°C). An average low-temperature of 64.2°F (17.9°C) is observed during the September nights.Heat index
For most parts of September, the heat index is estimated at a tropical 89.6°F (32°C). With extended exposure and activity, one might feel exhausted and experience heat cramps.Given the heat index, its values are aligned with shaded sites and gentle winds. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are quite important for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humidity
July through September, with an average relative humidity of 71%, are the least humid months in Suwanee.Rainfall
In Suwanee, in September, during 13.2 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. In Suwanee, during the entire year, the rain falls for 180.4 days and collects up to 43.11" (1095mm) of precipitation.Snowfall
In Suwanee, snow does not fall in April through October.Daylight
In Suwanee, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 7:10 am and sunset at 8:01 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:21 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Suwanee, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 5 during September translates into the following guidance:
Act with care - Obligation to protect against skin and eye damage is highlighted. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the least humid month in Suwanee?
What is the average humidity in September?
How many days does it rain in September in Suwanee?
When it does not snow?
How many hours of daylight does Suwanee have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September in Suwanee?
Average temperature in September
Suwanee, GA
- Average high temperature in September: 83.1°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (49.1°F).
- Average low temperature in September: 64.2°F
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (33.8°F).
Average pressure in September
Suwanee, 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
Suwanee, GA
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Suwanee, 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, August and September (71%).
Average rainfall in September
Suwanee, GA
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is August (4.49").
The driest month (with the least rainfall) is October (2.28").
Average rainfall days in September
Suwanee, GA
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is October (10 days).
Average snowfall in September
Suwanee, GA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.14").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Suwanee, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.7 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
Suwanee, 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 months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Suwanee, GA
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (8.9 days).
Average UV index in September
Suwanee, 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
Suwanee, GA
- Average cloud cover in September: 32
The months with the most cloud cover are February and December (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Suwanee, 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).
Suwanee, Georgia, USA
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