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
The shift from August to September is characterized by an average high-temperature of a still warm 80.4°F (26.9°C), not significantly different from the 85.6°F (29.8°C) of August. In Sumac, September nights witness a steady temperature drop to a mild 59.9°F (15.5°C).Humidity
In Sumac, the average relative humidity in September is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 14.5 days and typically collects 2.91" (74mm) of precipitation.Snowfall
In Sumac, snow does not fall in April through September.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September, sunrise is at 7:12 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:24 pm EDT.
Sunshine
In Sumac, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September in Sumac?
What is the driest month in Sumac?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Sumac have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Sumac have in September?
How high is the UV index in September?
Average temperature in September
Sumac, GA
- Average high temperature in September: 80.4°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (46°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).
Average pressure in September
Sumac, 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 (29.98"Hg).
Average wind speed in September
Sumac, GA
- Average wind speed in September: 4.1mph
The windiest month (with the highest average wind speed) is February (6.7mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Sumac, GA
- Average humidity in September: 77%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are August, October and November (76%).
Average rainfall in September
Sumac, GA
- Average rainfall in September: 2.91"
The wettest month (with the highest rainfall) is July (4.84").
The driest month (with the least rainfall) is September (2.91").
Average rainfall days in September
Sumac, GA
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is July (20 days).
The month with the least rainy days is November (10.3 days).
Average snowfall in September
Sumac, GA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.61").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Sumac, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sumac, GA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
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 June (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Sumac, GA
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is October (19 days).
The month with the least sunshine days is July (8.7 days).
Average UV index in September
Sumac, 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, February and December (UV index 2).
Average cloud cover in September
Sumac, GA
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Sumac, GA
- Average visibility in September: 5mi
The months with the highest visibility are June, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September and December (5mi).
Sumac, Georgia, USA
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