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 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 shift into September finds Needham at an average high-temperature of a still hot 86.4°F (30.2°C), closely comparable to August's conditions. September brings an average low-temperature of 69.8°F (21°C) to Needham.Heat index
During September, the heat index is appraised at a very hot 98.6°F (37°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.Heat index's context suggests values are appropriate for shady areas and slight breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
In Needham, the average relative humidity in September is 77%.Rainfall
In Needham, in September, it is raining for 12.9 days, with typically 1.1" (28mm) of accumulated precipitation. In Needham, during the entire year, the rain falls for 139 days and collects up to 15.12" (384mm) of precipitation.Daylight
In September, the average length of the day is 12h and 20min.On the first day of the month, sunrise is at 7:06 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:23 am and sunset at 7:15 pm EDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In Needham, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Needham have in September?
What is the UV index intensity in September?
Average temperature in September
Needham, GA
- Average high temperature in September: 86.4°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (59.5°F).
- Average low temperature in September: 69.8°F
The month with the highest average low temperature is August (74.1°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure in September
Needham, GA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in September
Needham, GA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Needham, GA
- Average humidity in September: 77%
The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is January (71%).
Average rainfall in September
Needham, GA
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is August (2.4").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Needham, GA
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is August (18.7 days).
The month with the least rainy days is November (6.2 days).
Average daylight in September /
Average sunshine in September
Needham, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Needham, GA
- Average sunshine days in September: 12.2 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is August (7.8 days).
Average UV index in September
Needham, GA
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Needham, GA
- Average cloud cover in September: 33
The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 30).
Average visibility in September
Needham, 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).
Needham, Georgia, USA
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