Dunwoody
Georgia, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Dunwoody, GA

September, the first month of the autumn, in Dunwoody, is also a moderately hot month, with average temperature fluctuating between 84°F (28.9°C) and 65.5°F (18.6°C).

Temperature

In Dunwoody, the average high-temperature marginally drops, from a hot 89.6°F (32°C) in August, to a warm 84°F (28.9°C). In Dunwoody, the average low-temperature is 65.5°F (18.6°C).

Heat index

The average heat index in September is appraised at a tropical 90.1°F (32.3°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the 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 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, clothing, pregnancy, and wind 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. 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 Dunwoody, the average relative humidity is 69%.

Rainfall

In Dunwoody, during September, the rain falls for 12.3 days and regularly aggregates up to 2.56" (65mm) of precipitation. In Dunwoody, Georgia, during the entire year, the rain falls for 180.4 days and collects up to 42.91" (1090mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

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

Sunshine

In Dunwoody, the average sunshine in September is 8.5h.

UV index

In Dunwoody, Georgia, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. 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 Dunwoody?

In Dunwoody, in September, the average high-temperature is 84°F (28.9°C), and the average low-temperature is 65.5°F (18.6°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that calculates temperature value influenced by the moisture in the air, is calculated to 90.1°F (32.3°C).

What is the average humidity in September in Dunwoody?

In Dunwoody, Georgia, the average relative humidity in September is 69%.

How many days does it rain in September in Dunwoody?

In September, in Dunwoody, Georgia, the rain falls for 12.3 days. Throughout September, 2.56" (65mm) of precipitation is accumulated.

When it does not snow in Dunwoody?

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

How many hours of daylight does Dunwoody have in September?

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

How many hours of sunshine does Dunwoody have in September?

The average sunshine in September in Dunwoody is 8.5h.

How high is the UV index in September in Dunwoody?

In September, the average daily maximum UV index in Dunwoody, Georgia, is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to the UV radiation.
Average temperature in September - Dunwoody, GA
  • Average high temperature in September: 84°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 (49.6°F).

  • Average low temperature in September: 65.5°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 (34.3°F).

Average humidity in September - Dunwoody, GA
  • Average humidity in September: 69%

The month with the highest relative humidity is December (77%).
Months with the lowest relative humidity are July and August (68%).

Average rainfall in September - Dunwoody, GA
  • Average rainfall in September: 2.56"

The wettest month (with the highest rainfall) is August (5.16").
The driest month (with the least rainfall) is October (2.17").

Average rainfall days in September - Dunwoody, GA
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is October (9.5 days).

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

The month with the highest snowfall is January (1.14").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is January (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 - Dunwoody, 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: 8.5h

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

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

The month with the highest UV index is August (UV index 7).
The month with the lowest UV index is December (UV index 2).