September weather forecast and climate
Forest Mill, GA

The first month of the autumn, September, is still a warm month in Forest Mill, Georgia, with average temperature varying between 64.9°F (18.3°C) and 84.7°F (29.3°C).

Temperature

In September, the average high-temperature is almost the same as in August - a moderately hot 84.7°F (29.3°C). The average low-temperature, in September, is 64.9°F (18.3°C).

Heat index

The average heat index is estimated at a tropical 93.2°F (34°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 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, metabolic differences, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Forest Mill, the average relative humidity in September is 73%.

Rainfall

In Forest Mill, Georgia, in September, during 10.2 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. In Forest Mill, during the entire year, the rain falls for 132.6 days and collects up to 14.41" (366mm) of precipitation.

Snowfall

In Forest Mill snow does not fall in March through December.

Daylight

The average length of the day in September is 12.4h.

Sunshine

The average sunshine in Forest Mill is 8.6h.

UV index

In Forest Mill, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
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 Forest Mill?

In September, in Forest Mill, Georgia, the average high-temperature is 84.7°F (29.3°C), and the average low-temperature is 64.9°F (18.3°C). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that combines both air temperature and relative humidity, is appraised at 93.2°F (34°C).

What is the average humidity in September in Forest Mill?

In Forest Mill, the average relative humidity in September is 73%.

How much does it rain in Forest Mill in September?

In Forest Mill, Georgia, during September, the rain falls for 10.2 days and regularly aggregates up to 0.79" (20mm) of precipitation.

When it does not snow in Forest Mill?

March through December are months without snowfall in Forest Mill, Georgia.

How many hours of daylight does Forest Mill have in September?

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

How long on average sun shines in September in Forest Mill?

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

How high is the UV index in September in Forest Mill?

The average daily maximum UV index in September in Forest Mill, Georgia, 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 - Forest Mill, GA
  • Average high temperature in September: 84.7°F

The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (51.6°F).

  • Average low temperature in September: 64.9°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 (35.6°F).

Average pressure in September - Forest Mill, GA
  • Average pressure in September: 30.02"

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 - Forest Mill, GA
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is January (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

Average humidity in September - Forest Mill, GA
  • Average humidity in September: 73%

The month with the highest relative humidity is December (77%).
Months with the lowest relative humidity are October and November (72%).

Average rainfall in September - Forest Mill, GA
  • Average rainfall in September: 0.79"

The wettest month (with the highest rainfall) is August (2.2").
The driest month (with the least rainfall) is October (0.75").

Average rainfall days in September - Forest Mill, GA
  • Average rainfall days in September: 10.2 days

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is November (6 days).

Average snowfall in September - Forest Mill, GA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.08").
Months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days in September - Forest Mill, GA
  • Average snowfall days in September: 0 days

Months with the highest number of snowfall days are January and February (0.4 days).
Months with the least snowfall days are March, April, May, June, July, August, September, October and December (0 days).

Average daylight in September / Average sunshine in September - Forest Mill, 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: 10h).

  • 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: 5.1h).

Average sunshine days in September - Forest Mill, GA
  • Average sunshine days in September: 17.9 days

The month with the most sunshine days is October (22.5 days).
The month with the least sunshine days is July (10.8 days).

Average UV index in September - Forest Mill, GA
  • Average UV index in September: 5

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January and December (UV index 2).

Average cloud cover in September - Forest Mill, GA
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 45).
Months with the least cloud cover are June and October (Cloud cover 31).

Average visibility in September - Forest Mill, 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).