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 climate shows a minor adjustment in average high-temperatures to a moderately hot 84°F (28.9°C) from August's 88.5°F (31.4°C). September nights are marked by an average temperature drop to a refreshing 65.5°F (18.6°C).Heat index
September's mean heat index is appraised at a hot 91.4°F (33°C). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.Evaluating the heat index requires understanding its values in the shade and with gentle winds. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely significant for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Humidity
In Williamson, the average relative humidity in September is 73%.Rainfall
In September, in Williamson, the rain falls for 13.8 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. In Williamson, during the entire year, the rain falls for 179.6 days and collects up to 39.84" (1012mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day in Williamson is 12h and 22min.On the first day of the month, sunrise is at 7:12 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:31 am and sunset at 7:22 pm EDT.
Sunshine
In September, the average sunshine in Williamson, Georgia, is 8.5h.UV index
In September, the average daily maximum UV index in Williamson is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum UV index of 5 in September translates into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
How hot does it get in Williamson in September?
What is the average humidity in September in Williamson?
How many days does it rain in September in Williamson?
When it does not snow in Williamson?
How many hours of daylight does Williamson have in September?
What time are sunrise and sunset in September in Williamson?
How many hours of sunshine does Williamson have in September?
What is the UV index intensity in September in Williamson?
Average temperature in September
Williamson, GA
- Average high temperature in September: 84°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (52.2°F).
- Average low temperature in September: 65.5°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (36.1°F).
Average pressure in September
Williamson, GA
- Average pressure in September: 30.02"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
Williamson, GA
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Williamson, GA
- Average humidity in September: 73%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are October and November (72%).
Average rainfall in September
Williamson, GA
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is August (4.61").
The driest month (with the least rainfall) is October (2.09").
Average rainfall days in September
Williamson, GA
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is July (22.6 days).
The month with the least rainy days is October (9.3 days).
Average snowfall in September
Williamson, GA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Williamson, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1 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
Williamson, GA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- 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 6min).
Average sunshine days in September
Williamson, GA
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (7.4 days).
Average UV index in September
Williamson, 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, February and December (UV index 3).
Average cloud cover in September
Williamson, GA
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 45).
The months with the least cloud cover are June, September and October (Cloud cover 31).
Average visibility in September
Williamson, 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).
Williamson, Georgia, USA
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