September weather forecastGrantville, GA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Grantville, Georgia, with an average temperature fluctuating between 83.7°F (28.7°C) and 64.8°F (18.2°C).Temperature
Grantville observes an average high-temperature of a warm 83.7°F (28.7°C) in September, barely different from 88.3°F (31.3°C) in August. Grantville records an average nighttime low of 64.8°F (18.2°C) in September.Heat index
The heat index in September is computed to be a hot 91.4°F (33°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Humidity
In Grantville, the average relative humidity in September is 74%.Rainfall
September is the month with the least rainfall in Grantville. Rain falls for 8.4 days and accumulates 0.35" (9mm) of precipitation.Snowfall
In Grantville, snow does not fall in February, April through December.Daylight
The average length of the day in September is 12h and 22min.On the first day of September in Grantville, sunrise is at 7:14 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:24 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A daily high UV index of 6 in September leads to these guidelines:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grantville, GA
- Average high temperature in September: 83.7°F
The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (51.8°F).
- Average low temperature in September: 64.8°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (35.4°F).
Average pressure in September
Grantville, 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 (29.98"Hg).
Average wind speed in September
Grantville, GA
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Grantville, GA
- Average humidity in September: 74%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are October and November (72%).
Average rainfall in September
Grantville, GA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is August (1.1").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in September
Grantville, GA
- Average rainfall days in September: 8.4 days
The month with the highest number of rainy days is July (14.1 days).
The month with the least rainy days is October (5.2 days).
Average snowfall in September
Grantville, GA
- Average snowfall in September: 0"
The months with the highest snowfall are January and March (0.04").
The months with the least snowfall are February, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Grantville, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Grantville, GA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Grantville, GA
- Average sunshine days in September: 18.7 days
The month with the most sunshine days is October (24.3 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in September
Grantville, GA
- Average UV index in September: 6
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Grantville, GA
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 46).
The months with the least cloud cover are June, September and October (Cloud cover 31).
Average visibility in September
Grantville, GA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
