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
As August shifts into September, a minor alteration in temperatures is observed, with average highs reducing from 84.4°F (29.1°C) to a still moderately hot 78.6°F (25.9°C). From significant daily highs, Williamson Terrace's nights in September cool down to an average low-temperature of 56.8°F (13.8°C).Humidity
In Williamson Terrace, the average relative humidity in September is 76%.Rainfall
The month with the least rainfall in Williamson Terrace is September, when the rain falls for 12.5 days and typically collects 1.46" (37mm) of precipitation.Snowfall
In Williamson Terrace, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:59 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:24 am and sunset at 7:13 pm EDT.
Sunshine
In September, the average sunshine in Williamson Terrace is 8.3h.UV index
The average daily maximum UV index in September in Williamson Terrace, West Virginia, is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Williamson Terrace in September?
What is the average humidity in September in Williamson Terrace?
What is the driest month in Williamson Terrace?
How many days does it rain in September in Williamson Terrace?
When it does not snow in Williamson Terrace?
Does it snow in Williamson Terrace in September?
How many hours of daylight does Williamson Terrace have in September?
What time are sunrise and sunset in September in Williamson Terrace?
How long on average sun shines in September in Williamson Terrace?
What is the UV index intensity in September in Williamson Terrace?
Average temperature in September
Williamson Terrace, WV
- Average high temperature in September: 78.6°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in September
Williamson Terrace, WV
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Williamson Terrace, WV
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Williamson Terrace, WV
- Average humidity in September: 76%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are July, August and November (75%).
Average rainfall in September
Williamson Terrace, WV
- Average rainfall in September: 1.46"
The wettest months (with the highest rainfall) are February and May (3.27").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in September
Williamson Terrace, WV
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (10.1 days).
Average snowfall in September
Williamson Terrace, WV
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Williamson Terrace, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Williamson Terrace, WV
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Williamson Terrace, WV
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is October (17.7 days).
The month with the least sunshine days is May (10.5 days).
Average UV index in September
Williamson Terrace, WV
- Average UV index in September: 4
The months with the highest UV index are June 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
Williamson Terrace, WV
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Williamson Terrace, WV
- 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).
Williamson Terrace, West Virginia, USA
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