September weather forecastGriffin, GA
September
Weather in September
September brings about a marked change in Griffin's weather with average high and low temperatures wavering around 84°F (28.9°C) and 65.5°F (18.6°C) respectively. The rhythm of fall begins to resonate, with temperatures dropping and daylight hours decreasing. However, the residual warmth from summer still lingers during the early days of the month. With the dwindling humidity, the transition from September to October enhances the arrival of fall along with cooler, more manageable temperatures.Temperature
As Griffin welcomes September, the average high-temperature stabilizes at a warm 84°F (28.9°C), showing little deviation from August's 88.5°F (31.4°C). Nighttime temperatures in September average to a comfortable 65.5°F (18.6°C) in Griffin, Georgia.Heat index
Throughout September, the heat index is computed to be a hot 91.4°F (33°C). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
The average relative humidity in September in Griffin, Georgia, is 73%.Rainfall
In September, in Griffin, the rain falls for 13.8 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. Throughout the year, there are 179.6 rainfall days, and 39.84" (1012mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Griffin is 12h and 22min.On the first day of September, sunrise is at 7:11 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 7:22 pm EDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In Griffin, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Griffin, GA
- Average high temperature in September: 84°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (52.2°F).
- Average low temperature in September: 65.5°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 (36.1°F).
Average pressure in September
Griffin, 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
Griffin, GA
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Griffin, GA
- Average humidity in September: 73%
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
Griffin, GA
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is August (4.61").
The driest month (with the least rainfall) is October (2.09").
Average rainfall days in September
Griffin, GA
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is July (22.6 days).
The month with the least rainy days is October (9.3 days).
Average snowfall in September
Griffin, GA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Griffin, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1 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
Griffin, 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 30min
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
Griffin, GA
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (7.4 days).
Average UV index in September
Griffin, GA
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Griffin, GA
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 45).
The months with the least cloud cover are June, September and October (Cloud cover 31).
Average visibility in September
Griffin, 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).
