September weather forecastKeysville, GA
September
Weather in September
The first month of the autumn, September, is still a warm month in Keysville, Georgia, with an average temperature fluctuating between 85.3°F (29.6°C) and 67.1°F (19.5°C).Temperature
Keysville notes an average high-temperature of a warm 85.3°F (29.6°C) in September, hardly diverging from August. In September, the temperature drops to an average of 67.1°F (19.5°C) at night.Heat index
The average heat index in September is estimated at a very hot 95°F (35°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.It is important to note that the heat index values are for shaded areas and light wind scenarios. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.
Humidity
In September, the average relative humidity is 72%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.9 days and typically collects 1.93" (49mm) of precipitation.Snowfall
In Keysville, snow does not fall in April through November.Daylight
In Keysville, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 7:03 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:14 pm EDT.
Sunshine
The average sunshine in September in Keysville is 8.7h.UV index
The average daily maximum UV index in September in Keysville, Georgia, is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.Note: A daily maximum UV index of 6 in September translates into the following instructions:
Shun overexposure. Protection from sun ravages is indispensable. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Keysville, GA
- Average high temperature in September: 85.3°F
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is January (54.3°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (37.9°F).
Average pressure in September
Keysville, GA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Keysville, GA
- Average wind speed in September: 6mph
The windiest months (with the highest average wind speed) are February and March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Keysville, GA
- Average humidity in September: 72%
The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are January, July, October and November (71%).
Average rainfall in September
Keysville, GA
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Keysville, GA
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is August (20.1 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in September
Keysville, GA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.28").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Keysville, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (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
Keysville, 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 54min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Keysville, GA
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (8.8 days).
Average UV index in September
Keysville, GA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Keysville, GA
- Average cloud cover in September: 30
The months with the most cloud cover are February and December (Cloud cover 41).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in September
Keysville, 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).
