Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's arrival in Marietta coincides with a soft drop in the average high-temperature, subtly decreasing from August's tropical 89.4°F (31.9°C) to a warm 84°F (28.9°C). The nights of September in Marietta anticipate an average low-temperature of 65.5°F (18.6°C).Heat index
During September, the heat index is computed to be a hot 89.6°F (32°C). Persistently participating in activities during exposure may lead to fatigue and induce 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' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital 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
In September, the average relative humidity in Marietta, Georgia, is 69%.Rainfall
In Marietta, Georgia, in September, it is raining for 12.8 days, with typically 2.76" (70mm) of accumulated precipitation. In Marietta, during the entire year, the rain falls for 177.1 days and collects up to 41.93" (1065mm) of precipitation.Snowfall
April through November are months without snowfall in Marietta, Georgia.Daylight
In September, the average length of the day in Marietta is 12h and 22min.On the first day of September in Marietta, sunrise is at 7:12 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:23 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The daily maximum UV index of 5 in September interprets into the following advice:
Act with care - The suggestion to avoid sunburn is emphasized. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
How hot is September in Marietta?
What is the average humidity in September in Marietta?
How many days does it rain in September in Marietta?
When it does not snow in Marietta?
What is the average length of the day in September in Marietta?
When are sunrise and sunset in September in Marietta?
How long on average sun shines in September in Marietta?
What is the UV index reading in September in Marietta?
Average temperature in September
Marietta, 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 (34.2°F).
Average pressure in September
Marietta, 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
Marietta, GA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Marietta, GA
- Average humidity in September: 69%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Marietta, GA
- Average rainfall in September: 2.76"
The wettest month (with the highest rainfall) is August (4.88").
The driest month (with the least rainfall) is October (2.24").
Average rainfall days in September
Marietta, GA
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is November (9.5 days).
Average snowfall in September
Marietta, GA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.98").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Marietta, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.6 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
Marietta, 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 3min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Marietta, GA
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is October (20.1 days).
The month with the least sunshine days is July (9.6 days).
Average UV index in September
Marietta, GA
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Marietta, GA
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Marietta, 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).
Marietta, Georgia, USA
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