September weather forecast
Forest Park, GA

Weather in September

The first month of the autumn, September, is still a warm month in Forest Park, Georgia, with average temperature fluctuating between 84.2°F (29°C) and 65.3°F (18.5°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a warm 84.2°F (29°C). In September, in Forest Park, the average low-temperature is 65.3°F (18.5°C).

Heat index

The average heat index in September is calculated to be a tropical 91.2°F (32.9°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. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'real feel', or 'feels like', 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 (metabolic differences, pregnancy, differences in body mass, height, and shape), 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 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 Forest Park, the average relative humidity in September is 71%.

Rainfall

In September, in Forest Park, the rain falls for 12.1 days. Throughout September, 1.97" (50mm) of precipitation is accumulated. Throughout the year, in Forest Park, there are 170.9 rainfall days, and 31.54" (801mm) of precipitation is accumulated.

Snowfall

In Forest Park snow does not fall in April through October.

Daylight

In Forest Park, the average length of the day is 12.4h.

Sunshine

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

UV index

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 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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Forest Park?

The average high-temperature, in September, in Forest Park, is 84.2°F (29°C), while the average low-temperature is 65.3°F (18.5°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in September is calculated to be 91.2°F (32.9°C).

What is the average humidity in September in Forest Park?

The average relative humidity in September is 71%.

How many days does it rain in September in Forest Park?

In Forest Park, during September, the rain falls for 12.1 days and regularly aggregates up to 1.97" (50mm) of precipitation.

When it does not snow in Forest Park?

April through October are months without snowfall in Forest Park.

What is the average length of the day in September in Forest Park?

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

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

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

What is the UV index intensity in September in Forest Park?

The average daily maximum UV index in September in Forest Park, Georgia, is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in September
Forest Park, GA

Average temperature in September - Forest Park, GA
  • Average high temperature in September: 84.2°F

The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (50.7°F).

  • Average low temperature in September: 65.3°F

The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (35.4°F).

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Average pressure in September
Forest Park, GA

Average pressure in September - Forest Park, 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").

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Average wind speed in September
Forest Park, GA

Average wind speed in September - Forest Park, GA
  • Average wind speed in September: 4.9mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in September
Forest Park, GA

Average humidity in September - Forest Park, GA
  • Average humidity in September: 71%

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

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Average rainfall in September
Forest Park, GA

Average rainfall in September - Forest Park, GA
  • Average rainfall in September: 1.97"

The wettest month (with the highest rainfall) is August (4.29").
The driest month (with the least rainfall) is October (1.57").

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Average rainfall days in September
Forest Park, GA

Average rainfall days in September - Forest Park, GA
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is July (21.3 days).
Months with the least rainy days are October and November (9.5 days).

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Average snowfall in September
Forest Park, GA

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

The month with the highest snowfall is February (0.35").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Forest Park, GA

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

The month with the highest number of snowfall days is February (1.4 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Forest Park, GA

Average daylight in September / Average sunshine in September - Forest Park, 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

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

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Average sunshine days in September
Forest Park, GA

Average sunshine days in September - Forest Park, GA
  • Average sunshine days in September: 16.6 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (8.8 days).

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Average UV index in September
Forest Park, GA

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

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

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Average cloud cover in September
Forest Park, GA

Average cloud cover in September - Forest Park, GA
  • Average cloud cover in September: 31

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

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Average visibility in September
Forest Park, GA

Average visibility in September - Forest Park, 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).

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