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
Williamstown, Georgia, marks the onset of September with an average high-temperature of a still warm 79.3°F (26.3°C), subtly divergent from August's 84.4°F (29.1°C). Williamstown's nighttime temperature during September is consistently averaged at a moderate 59.5°F (15.3°C).Humidity
In September, the average relative humidity is 78%.Rainfall
September is the month with the least rainfall in Williamstown. Rain falls for 14.9 days and accumulates 2.91" (74mm) of precipitation.Snowfall
In Williamstown, snow does not fall in May through September.Daylight
The average length of the day in September in Williamstown is 12h and 23min.On the first day of the month, sunrise is at 7:10 am and sunset at 8:03 pm. On the last day of September, sunrise is at 7:31 am and sunset at 7:22 pm EDT.
Sunshine
In Williamstown, Georgia, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index in Williamstown, Georgia, is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 5 in September translates into these instructions:
Act with care - The suggestion to avoid sunburn is emphasized. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Frequently asked questions
What are the temperatures in Williamstown in September?
What is the average humidity in September in Williamstown?
What is the driest month in Williamstown?
How many days does it rain in September in Williamstown?
When it does not snow in Williamstown?
Does it snow in Williamstown in September?
How many hours of daylight does Williamstown have in September?
When is the sunrise / sunset in September in Williamstown?
How many hours of sunshine does Williamstown have in September?
How high is the UV index in September in Williamstown?
Average temperature in September
Williamstown, GA
- Average high temperature in September: 79.3°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in September: 59.5°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure in September
Williamstown, GA
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Williamstown, GA
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is February (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in September
Williamstown, GA
- Average humidity in September: 78%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are October and November (76%).
Average rainfall in September
Williamstown, GA
- Average rainfall in September: 2.91"
The wettest month (with the highest rainfall) is December (4.8").
The driest month (with the least rainfall) is September (2.91").
Average rainfall days in September
Williamstown, GA
- Average rainfall days in September: 14.9 days
The months with the highest number of rainy days are June and July (19.8 days).
The month with the least rainy days is November (11.3 days).
Average snowfall in September
Williamstown, GA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Williamstown, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Williamstown, GA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
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 June (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Williamstown, GA
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is October (17.4 days).
The month with the least sunshine days is June (8 days).
Average UV index in September
Williamstown, 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 and December (UV index 2).
Average cloud cover in September
Williamstown, GA
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 32).
Average visibility in September
Williamstown, GA
- Average visibility in September: 5mi
The month with the highest visibility is June (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (5mi).
Williamstown, Georgia, USA
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