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
Williamsburg in September experiences a gentle temperature dip, with average high-temperatures reducing from a moderately hot 84.9°F (29.4°C) in August to a still warm 78.8°F (26°C). September brings with it a nighttime average temperature of 57.6°F (14.2°C).Humidity
In September, the average relative humidity is 78%.Rainfall
The month with the least rainfall in Williamsburg is September, when the rain falls for 13.5 days and typically collects 2.32" (59mm) of precipitation.Snowfall
In Williamsburg, Kentucky, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 7:08 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 7:21 pm EDT.
Sunshine
In Williamsburg, the average sunshine in September is 8.3h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 5 during September translates into the following directions:
Prioritize safety - Recommendations to avert sunburn are shared. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Williamsburg?
What is the average humidity in September in Williamsburg?
What is the driest month?
How much does it rain in Williamsburg in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Williamsburg have in September?
When are sunrise and sunset in September?
How long on average sun shines in September in Williamsburg?
How high is the UV index in September?
Average temperature in September
Williamsburg, KY
- Average high temperature in September: 78.8°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (41.7°F).
- Average low temperature in September: 57.6°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in September
Williamsburg, KY
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Williamsburg, KY
- Average wind speed in September: 4mph
The windiest months (with the highest average wind speed) are February and April (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Williamsburg, KY
- Average humidity in September: 78%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is August (76%).
Average rainfall in September
Williamsburg, KY
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is February (4.37").
The driest month (with the least rainfall) is September (2.32").
Average rainfall days in September
Williamsburg, KY
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is November (11.3 days).
Average snowfall in September
Williamsburg, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.06").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Williamsburg, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.1 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
Williamsburg, KY
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Williamsburg, KY
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is October (15.8 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in September
Williamsburg, KY
- 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
Williamsburg, KY
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 57).
The months with the least cloud cover are June and August (Cloud cover 32).
Average visibility in September
Williamsburg, KY
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Williamsburg, Kentucky, USA
Weather forecast for your location
2. Allow the app to use your location