September weather forecast
River Colony, GA

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Weather in September

September, the first month of the autumn in River Colony, is still a warm month, with temperature in the range of an average low of 64.9°F (18.3°C) and an average high of 83.7°F (28.7°C).

Temperature

A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a tropical 89.1°F (31.7°C) to a moderately hot 83.7°F (28.7°C). Throughout September, River Colony's nights cool down to an average of 64.9°F (18.3°C).

Heat index

The heat index in September is computed to be a hot 89.6°F (32°C). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.
Be advised, the heat index considers values for conditions in shade and with a light breeze. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.

Humidity

The average relative humidity in September is 70%.

Rainfall

In River Colony, in September, during 12.3 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. Throughout the year, there are 172.5 rainfall days, and 40.59" (1031mm) of precipitation is accumulated.

Snowfall

In River Colony, snow does not fall in April through October.

Daylight

In River Colony, the average length of the day in September is 12h and 22min.
On the first day of the month, sunrise is at 7:10 am and sunset at 8:01 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:21 pm EDT.

Sunshine

The average sunshine in September is 8.4h.

UV index

In River Colony, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 5 transforms into these recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

The high-temperature, in September, in River Colony, is 83.7°F (28.7°C), while the low-temperature averages to 64.9°F (18.3°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is computed to be 89.6°F (32°C).

What is the average humidity in September?

In River Colony, the average relative humidity in September is 70%.

How much does it rain in September?

In September, the rain falls for 12.3 days. Throughout September, 2.48" (63mm) of precipitation is accumulated.

When it does not snow?

April through October are months without snowfall.

How many hours of daylight does River Colony have in September?

In River Colony, the average day length in September is 12h and 22min.

When is the sunrise / sunset in September in River Colony?

On the first day of September in River Colony, sunrise is at 7:10 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:21 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration in River Colony is 8.4h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 5. A UV Index 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 daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
River Colony, GA

Average temperature in September - River Colony, 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).

Average pressure in September
River Colony, GA

Average pressure in September - River Colony, 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).

Average wind speed in September
River Colony, GA

Average wind speed in September - River Colony, 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).

Average humidity in September
River Colony, GA

Average humidity in September - River Colony, 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%).

Average rainfall in September
River Colony, GA

Average rainfall in September - River Colony, 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").

Average rainfall days in September
River Colony, GA

Average rainfall days in September - River Colony, 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).

Average snowfall in September
River Colony, GA

Average snowfall in September - River Colony, 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").

Average snowfall days in September
River Colony, GA

Average snowfall days in September - River Colony, 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).

Average daylight in September /
Average sunshine in September
River Colony, GA

Average daylight in September / Average sunshine in September - River Colony, GA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 8h and 2min

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).

Average sunshine days in September
River Colony, GA

Average sunshine days in September - River Colony, 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).

Average UV index in September
River Colony, GA

Average UV index in September - River Colony, 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).

Average cloud cover in September
River Colony, GA

Average cloud cover in September - River Colony, 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).

Average visibility in September
River Colony, GA

Average visibility in September - River Colony, 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).

River Colony, Georgia, USA

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