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

September weather forecast and climate
Irwinton, GA

The first month of the autumn, September, is also a moderately hot month in Irwinton, Georgia, with temperature in the range of an average low of 66.7°F (19.3°C) and an average high of 85.1°F (29.5°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a warm 85.1°F (29.5°C). In September, the average low-temperature is 66.7°F (19.3°C).

Heat index

In September, the average heat index is calculated to a tropical 94.1°F (34.5°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 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, clothing, metabolic differences). 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. 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

The average relative humidity in Irwinton, Georgia, is 73%.

Rainfall

In September, the rain falls for 13.8 days. Throughout September, 2.28" (58mm) of precipitation is accumulated. Throughout the year, there are 175.2 rainfall days, and 36.38" (924mm) of precipitation is accumulated.

Snowfall

March through December are months without snowfall in Irwinton.

Daylight

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

Sunshine

The average sunshine is 8.6h.

UV index

In Irwinton, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to the UV radiation for average individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.

What is the temperature in September in Irwinton?

In Irwinton, in September, the average high-temperature is 85.1°F (29.5°C), and the average low-temperature is 66.7°F (19.3°C). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that calculates temperature value influenced by the moisture in the air, is evaluated at 94.1°F (34.5°C).

What is the average humidity in September in Irwinton?

The average relative humidity in September in Irwinton is 73%.

How much does it rain in Irwinton in September?

In September, in Irwinton, Georgia, the rain falls for 13.8 days. Throughout September, 2.28" (58mm) of precipitation is accumulated.

When it does not snow in Irwinton?

In Irwinton snow does not fall in March through December.

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

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

How many hours of sunshine does Irwinton have in September?

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

What is the UV index intensity in September in Irwinton?

In Irwinton, Georgia, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health threat from the exposure to the Sun's UV rays.
Average temperature in September - Irwinton, GA
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is January (54.1°F).

  • Average low temperature in September: 66.7°F

The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (38.1°F).

Average humidity in September - Irwinton, GA
  • Average humidity in September: 73%

The month with the highest relative humidity is December (76%).
Months with the lowest relative humidity are October and November (71%).

Average rainfall in September - Irwinton, GA
  • Average rainfall in September: 2.28"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is October (2.17").

Average rainfall days in September - Irwinton, GA
  • Average rainfall days in September: 13.8 days

The month with the highest number of rainy days is July (21.8 days).
The month with the least rainy days is November (8.9 days).

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

Months with the highest snowfall are January and February (0.24").
Months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

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

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

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

The month with the longest days is June (Average daylight: 14.3h).
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: 10.8h).
The month with the least sunshine is December (Average sunshine: 5.3h).

Average UV index in September - Irwinton, GA
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January and December (UV index 3).