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 average high-temperature during September registers at a moderately hot 84.4°F (29.1°C), maintaining a close resemblance to the previous month. During the month of September, Herndonville's nighttime temperature lowers to an average of 64.8°F (18.2°C).Heat index
The average heat index in September is calculated to be a hot 93.2°F (34°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.Note that heat index values are valued for light wind and location in the shade. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', evaluates the perceived heat by adding the effect of moisture in the air. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Humidity
In Herndonville, the average relative humidity in September is 73%.Rainfall
In Herndonville, in September, during 13.6 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Herndonville, Georgia, during the entire year, the rain falls for 179.3 days and collects up to 39.84" (1012mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
In September, the average length of the day in Herndonville is 12h and 22min.On the first day of the month, sunrise is at 7:09 am and sunset at 7:59 pm. On the last day of September, sunrise is at 7:28 am and sunset at 7:20 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In September, the average daily maximum UV index in Herndonville is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: A daily high UV index of 5 in September leads to these guidelines:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
How hot is it in Herndonville in September?
What is the average humidity in September in Herndonville?
How many days does it rain in September in Herndonville?
When it does not snow in Herndonville?
What is the average length of the day in September in Herndonville?
When is the sunrise / sunset in September in Herndonville?
How long on average sun shines in September in Herndonville?
How high is the UV index in September in Herndonville?
Average temperature in September
Herndonville, GA
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (51.4°F).
- Average low temperature in September: 64.8°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).
Average pressure in September
Herndonville, GA
- Average pressure in September: 30.02"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
Herndonville, GA
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Herndonville, GA
- Average humidity in September: 73%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are July, October and November (72%).
Average rainfall in September
Herndonville, GA
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is August (4.96").
The driest month (with the least rainfall) is October (2.2").
Average rainfall days in September
Herndonville, GA
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is July (22.3 days).
The month with the least rainy days is October (9.3 days).
Average snowfall in September
Herndonville, GA
- Average snowfall in September: 0"
The months with the highest snowfall are January and December (0.35").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Herndonville, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.8 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
Herndonville, 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: 10h and 0min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in September
Herndonville, GA
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is October (20.2 days).
The month with the least sunshine days is July (7.2 days).
Average UV index in September
Herndonville, GA
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Herndonville, GA
- Average cloud cover in September: 31
The months with the most cloud cover are February and December (Cloud cover 43).
The months with the least cloud cover are June and October (Cloud cover 30).
Average visibility in September
Herndonville, 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).
Herndonville, Georgia, USA
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