September weather forecastWilliamsburg, OH
September
Weather in September
September, the first month of the autumn in Williamsburg, is also a moderately hot month, with an average temperature fluctuating between 77°F (25°C) and 58.1°F (14.5°C).Temperature
A subtle shift in Williamsburg's weather is observed as August turns into September, with the average high temperature reducing from 82.8°F (28.2°C) to a still moderately hot 77°F (25°C). Nighttime temperatures in September average to a refreshing 58.1°F (14.5°C).Humidity
In September, the average relative humidity in Williamsburg is 76%.Rainfall
The month with the least rainfall in Williamsburg is September, when the rain falls for 10.7 days and typically collects 0.91" (23mm) of precipitation.Snowfall
In Williamsburg, Ohio, snow does not fall in May through September.Daylight
The average length of the day in September in Williamsburg is 12h and 26min.On the first day of September, sunrise is at 7:05 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 7:19 pm EDT.
Sunshine
The average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September in Williamsburg, Ohio, is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Williamsburg, OH
- Average high temperature in September: 77°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in September
Williamsburg, OH
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Williamsburg, OH
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in September
Williamsburg, OH
- Average humidity in September: 76%
The months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Williamsburg, OH
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is September (0.91").
Average rainfall days in September
Williamsburg, OH
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in September
Williamsburg, OH
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Williamsburg, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 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, OH
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 12min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Williamsburg, OH
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in September
Williamsburg, OH
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Williamsburg, OH
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Williamsburg, OH
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are May and July (5mi).
