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
With September's advent, Altamaha sees an average high-temperature of a warm 85.1°F (29.5°C), subtly shifted from August's 90°F (32.2°C). Throughout September, an average low-temperature of 68.9°F (20.5°C) is expected.Heat index
The heat index for September is estimated at a sweltering 95°F (35°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.Given the heat index, its values are aligned with shaded sites and gentle winds. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is found by incorporating humidity levels into the air temperature measurement. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.
Humidity
In September, the average relative humidity is 76%.Rainfall
In Altamaha, in September, during 16.7 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. In Altamaha, during the entire year, the rain falls for 176.6 days and collects up to 34.25" (870mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
In Altamaha, the average length of the day in September is 12h and 21min.On the first day of the month, sunrise is at 7:04 am and sunset at 7:52 pm. On the last day of September, in Altamaha, Georgia, sunrise is at 7:22 am and sunset at 7:14 pm EDT.
Sunshine
The average sunshine in September in Altamaha is 8.5h.UV index
In Altamaha, Georgia, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Altamaha have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Altamaha have in September?
What is the UV index intensity in September?
Average temperature in September
Altamaha, GA
- Average high temperature in September: 85.1°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 (57.4°F).
- Average low temperature in September: 68.9°F
The months with the highest average low temperature are July and August (73.4°F).
The coldest month (with the lowest average low temperature) is January (40.8°F).
Average pressure in September
Altamaha, GA
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Altamaha, GA
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Altamaha, GA
- Average humidity in September: 76%
The month with the highest relative humidity is August (77%).
The months with the lowest relative humidity are January and November (71%).
Average rainfall in September
Altamaha, GA
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is August (4.29").
The driest month (with the least rainfall) is November (1.61").
Average rainfall days in September
Altamaha, GA
- Average rainfall days in September: 16.7 days
The month with the highest number of rainy days is August (23.4 days).
The month with the least rainy days is November (7.6 days).
Average snowfall in September
Altamaha, 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
Altamaha, GA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Altamaha, GA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 3min
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 18min).
Average sunshine days in September
Altamaha, GA
- Average sunshine days in September: 10.7 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is August (5.4 days).
Average UV index in September
Altamaha, GA
- Average UV index in September: 6
The months with the highest UV index are May, June and July (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Altamaha, GA
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in September
Altamaha, 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).
Altamaha, Georgia, USA
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