September weather forecast
Lawrenceville, GA

Weather in September

September, the first month of the autumn in Lawrenceville, is still a warm month, with an average temperature ranging between min 64.9°F (18.3°C) and max 83.7°F (28.7°C).

Temperature

In Lawrenceville, Georgia, the average high-temperature in September marginally drops from a hot 89.1°F (31.7°C) in August to a moderately hot 83.7°F (28.7°C). The average low-temperature, in Lawrenceville, is 64.9°F (18.3°C).

Heat index

In September, the average heat index is calculated to be a hot 89.6°F (32°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
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', 'felt air temperature', 'feels like', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like pregnancy, wind, differences in body mass, height, and shape, and activity influence one's weather impression. 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

The average relative humidity in September in Lawrenceville is 70%.

Rainfall

In September, in Lawrenceville, the rain falls for 12.3 days. Throughout September, 2.48" (63mm) of precipitation is accumulated. Throughout the year, there are 172.5 rainfall days, and 40.59" (1031mm) of precipitation is accumulated.

Snowfall

In Lawrenceville, snow does not fall in April through October.

Daylight

The average length of the day in September is 12h and 22min.
On the first day of the month, sunrise is at 7:09 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:29 am and sunset at 7:22 pm EDT.

Sunshine

The average sunshine in September is 8.4h.

UV index

The average daily maximum UV index in September in Lawrenceville, Georgia, is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 in September transform into the following instructions:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Lawrenceville?

The average high-temperature, in September, is 83.7°F (28.7°C), while the average low-temperature is 64.9°F (18.3°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, in September is calculated to be 89.6°F (32°C).

What is the average humidity in September in Lawrenceville?

In September, the average relative humidity in Lawrenceville, Georgia, is 70%.

How many days does it rain in September in Lawrenceville?

In Lawrenceville, during September, the rain falls for 12.3 days and regularly aggregates up to 2.48" (63mm) of precipitation.

When it does not snow in Lawrenceville?

April through October are months without snowfall.

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

The average day length in September in Lawrenceville is 12h and 22min.

When are sunrise and sunset in September in Lawrenceville?

In September, on the first day of the month, sunrise is at 7:09 am and sunset at 8:02 pm. On the last day of the month, in Lawrenceville, Georgia, sunrise is at 7:29 am and sunset at 7:22 pm EDT.

How long on average sun shines in September in Lawrenceville?

The average sunshine duration in September in Lawrenceville is 8.4h.

What is the UV index intensity in September in Lawrenceville?

In Lawrenceville, Georgia, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Lawrenceville, GA

Average temperature in September - Lawrenceville, GA
  • Average high temperature in September: 83.7°F

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (49.6°F).

  • Average low temperature in September: 64.9°F

The month with the highest average low temperature is July (70.5°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).

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Average pressure in September
Lawrenceville, GA

Average pressure in September - Lawrenceville, GA
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

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Average wind speed in September
Lawrenceville, GA

Average wind speed in September - Lawrenceville, GA
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

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Average humidity in September
Lawrenceville, GA

Average humidity in September - Lawrenceville, GA
  • Average humidity in September: 70%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (69%).

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Average rainfall in September
Lawrenceville, GA

Average rainfall in September - Lawrenceville, GA
  • Average rainfall in September: 2.48"

The wettest month (with the highest rainfall) is August (5.04").
The driest month (with the least rainfall) is October (2.17").

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Average rainfall days in September
Lawrenceville, GA

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

The month with the highest number of rainy days is July (20 days).
The months with the least rainy days are October and November (9.7 days).

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Average snowfall in September
Lawrenceville, GA

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

The month with the highest snowfall is January (0.79").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Lawrenceville, GA

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

The months with the highest number of snowfall days are January and February (1.3 days).
The 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
Lawrenceville, GA

Average daylight in September / Average sunshine in September - Lawrenceville, GA
  • Average daylight in September: 12h and 22min

The month with the longest days is June (Average daylight: 14h and 23min).
The month with the shortest days is December (Average daylight: 9h and 56min).

  • Average sunshine in September: 8h and 24min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

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Average sunshine days in September
Lawrenceville, GA

Average sunshine days in September - Lawrenceville, GA
  • Average sunshine days in September: 16.6 days

The month with the most sunshine days is October (20.7 days).
The month with the least sunshine days is July (9 days).

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Average UV index in September
Lawrenceville, GA

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

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

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Average cloud cover in September
Lawrenceville, GA

Average cloud cover in September - Lawrenceville, GA
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 31).

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Average visibility in September
Lawrenceville, GA

Average visibility in September - Lawrenceville, GA
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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