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
The beginning of September records an average high-temperature of a warm 85.6°F (29.8°C), marking a negligible difference from August's 89.6°F (32°C). September brings an average low-temperature of 68.9°F (20.5°C) to Hartsfield.Heat index
For September, the heat index is appraised at a sweltering 96.8°F (36°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.Know that the heat index computations account for shaded terrains and slight winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. As body temperatures escalate without effective heat release, one might face dehydration threats.
Humidity
In Hartsfield, the average relative humidity in September is 77%.Rainfall
In September, the rain falls for 15 days. Throughout September, 1.26" (32mm) of precipitation is accumulated. In Hartsfield, during the entire year, the rain falls for 145.6 days and collects up to 15.94" (405mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
In Hartsfield, the average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:12 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:21 pm EDT.
Sunshine
The average sunshine in September is 8.8h.UV index
In Hartsfield, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The daily maximum UV index of 6 in September interprets into the following advice:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Hartsfield have in September?
What is the UV index reading in September?
Average temperature in September
Hartsfield, GA
- Average high temperature in September: 85.6°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (58.6°F).
- Average low temperature in September: 68.9°F
The month with the highest average low temperature is August (73°F).
The coldest month (with the lowest average low temperature) is January (41.9°F).
Average pressure in September
Hartsfield, GA
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in September
Hartsfield, GA
- Average wind speed in September: 5.9mph
The windiest months (with the highest average wind speed) are January and March (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.4mph).
Average humidity in September
Hartsfield, GA
- Average humidity in September: 77%
The month with the highest relative humidity is August (78%).
The months with the lowest relative humidity are May and November (71%).
Average rainfall in September
Hartsfield, GA
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is June (2.4").
The driest month (with the least rainfall) is November (0.59").
Average rainfall days in September
Hartsfield, GA
- Average rainfall days in September: 15 days
The month with the highest number of rainy days is August (22 days).
The month with the least rainy days is November (5.9 days).
Average snowfall in September
Hartsfield, GA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Hartsfield, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Hartsfield, GA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Hartsfield, GA
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is November (22.7 days).
The month with the least sunshine days is August (6.2 days).
Average UV index in September
Hartsfield, GA
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Hartsfield, GA
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are May and October (Cloud cover 28).
Average visibility in September
Hartsfield, GA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Hartsfield, Georgia, USA
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