September weather forecastGainesville, GA
September
Weather in September
September marks the shift from summer to fall in Gainesville, Georgia, bringing a noticeable decrease in average temperatures. The month is often associated with cooler evenings, lesser rainfall, and shorter but still pleasant daylight hours. A captivating transformation of the city's vegetation is observable as the days march forward into October. The most striking aspect of September's weather is the drastically reduced rainfall at 2.52" (64mm) compared to the preceding month, marking the start of a dryer spell.Temperature
At the onset of September, Gainesville records an average high-temperature of a moderately hot 82.8°F (28.2°C), showing little deviation from the preceding month. In September, Gainesville experiences a temperature dip to an average of 62.6°F (17°C) at night.Heat index
The average heat index in September is computed to be a hot 89.6°F (32°C). With ongoing exposure and activity, one might experience weariness, and heat cramps could ensue.Heat index's context suggests values are appropriate for shady areas and slight breezes. 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 'real feel' or 'apparent temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
In Gainesville, the average relative humidity in September is 74%.Rainfall
In Gainesville, Georgia, in September, during 13.4 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. In Gainesville, during the entire year, the rain falls for 181.4 days and collects up to 41.93" (1065mm) of precipitation.Snowfall
In Gainesville, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 7:09 am and sunset at 8:00 pm. On the last day of September, in Gainesville, sunrise is at 7:29 am and sunset at 7:20 pm EDT.
Sunshine
In Gainesville, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index in Gainesville is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Be vigilant - Preventing sunburn is recommended. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Gainesville, GA
- Average high temperature in September: 82.8°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (48.6°F).
- Average low temperature in September: 62.6°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).
Average pressure in September
Gainesville, 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
Gainesville, GA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is January (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Gainesville, GA
- Average humidity in September: 74%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are July, August, October and November (73%).
Average rainfall in September
Gainesville, GA
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is December (4.25").
The driest month (with the least rainfall) is October (2.36").
Average rainfall days in September
Gainesville, GA
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is July (20.9 days).
The month with the least rainy days is October (10.1 days).
Average snowfall in September
Gainesville, GA
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Gainesville, 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
Gainesville, 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 30min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in September
Gainesville, GA
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (7.8 days).
Average UV index in September
Gainesville, 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
Gainesville, GA
- Average cloud cover in September: 31
The months with the most cloud cover are February and December (Cloud cover 44).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Gainesville, GA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).
