Forest Park
Georgia, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Forest Park, GA

September, the first month of the autumn, in Forest Park, is also a moderately hot month, with average temperature ranging between max 84.2°F (29°C) and min 65.3°F (18.5°C).

Temperature

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

Heat index

In September, the average heat index is evaluated at 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.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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. Additional factors like activity, pregnancy, wind, and differences in body mass, height, and shape affect individual temperature impact. 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. 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

The average relative humidity is 71%.

Rainfall

In Forest Park, during 12.1 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Throughout the year, there are 170.9 rainfall days, and 31.54" (801mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall in Forest Park.

Daylight

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

Sunshine

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

UV index

In Forest Park, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sun damage is advised. 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 Park?

In September, in Forest Park, Georgia, the average high-temperature is 84.2°F (29°C), and the average low-temperature is 65.3°F (18.5°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that represents influence of the relative humidity to air temperaure, is calculated to 91.2°F (32.9°C).

What is the average humidity in September in Forest Park?

In Forest Park, Georgia, the average relative humidity in September is 71%.

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

In September, in Forest Park, Georgia, the rain falls for 12.1 days. Throughout September, 1.97" (50mm) of precipitation is accumulated.

When it does not snow in Forest Park?

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

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

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

How many hours of sunshine does Forest Park have in September?

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 is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.
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).

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%).

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").

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).

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").

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).

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).

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).