September weather forecast and climate
Graystone, GA

The first month of the autumn, September, is also a moderately hot month in Graystone, Georgia, with average temperature ranging between max 84°F (28.9°C) and min 65.1°F (18.4°C).

Temperature

In September, the average high-temperature is practically the same as in August - a warm 84°F (28.9°C). The average low-temperature, in Graystone, Georgia, is 65.1°F (18.4°C).

Heat index

In September, the average heat index is appraised at a tropical 90.9°F (32.7°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like wind, differences in body mass, height, and shape, metabolic differences, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In September, the average relative humidity in Graystone is 71%.

Rainfall

In Graystone, Georgia, during September, the rain falls for 11.5 days and regularly aggregates up to 1.54" (39mm) of precipitation. In Graystone, during the entire year, the rain falls for 158.9 days and collects up to 27.32" (694mm) of precipitation.

Snowfall

April through October are months without snowfall in Graystone.

Daylight

In Graystone, Georgia, the average length of the day in September is 12.4h.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In Graystone, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Graystone?

The average high-temperature, in September, in Graystone, is 84°F (28.9°C), while the average low-temperature is 65.1°F (18.4°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), that calculates temperature value influenced by the moisture in the air, is evaluated at 90.9°F (32.7°C).

What is the average humidity in September in Graystone?

The average relative humidity in September is 71%.

How much does it rain in Graystone in September?

In Graystone, in September, during 11.5 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

When it does not snow in Graystone?

April through October are months without snowfall in Graystone, Georgia.

What is the average length of the day in September in Graystone?

In September, the average length of the day is 12.4h.

How long on average sun shines in September in Graystone?

In Graystone, Georgia, the average sunshine in September is 8.6h.

What is the UV index intensity in September in Graystone?

The average daily maximum UV index in September in Graystone is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in September - Graystone, GA
  • Average high temperature in September: 84°F

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (49.8°F).

  • Average low temperature in September: 65.1°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (34.9°F).

Average pressure in September - Graystone, GA
  • Average pressure in September: 30.03"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.99").

Average wind speed in September - Graystone, GA
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

Average humidity in September - Graystone, GA
  • Average humidity in September: 71%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).

Average rainfall in September - Graystone, GA
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is August (3.78").
The driest month (with the least rainfall) is October (1.46").

Average rainfall days in September - Graystone, GA
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is July (18.8 days).
Months with the least rainy days are October and November (9.4 days).

Average snowfall in September - Graystone, GA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.43").
Months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September - Graystone, GA
  • Average snowfall days in September: 0 days

Months with the highest number of snowfall days are January and February (0.8 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Graystone, GA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is December (Average sunshine: 5h).

Average sunshine days in September - Graystone, GA
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is October (21.1 days).
The month with the least sunshine days is July (9.8 days).

Average UV index in September - Graystone, GA
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

Average cloud cover in September - Graystone, GA
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in September - Graystone, GA
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).