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 September commences, the average high-temperature subtly reduces, transitioning from 83.1°F (28.4°C) in August to a still moderately hot 77.4°F (25.2°C). Following the sharp contrast to daytime warmth, an average nighttime temperature of 55.8°F (13.2°C) gets registered in Copen during September.Humidity
The average relative humidity in September is 78%.Rainfall
The month with the least rainfall is September, when the rain falls for 14.7 days and typically collects 2.05" (52mm) of precipitation.Snowfall
In Copen, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:52 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:06 pm EDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
The average daily maximum UV index in September in Copen, West Virginia, is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. 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 are the temperatures in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Copen have in September?
How high is the UV index in September?
Average temperature in September
Copen, WV
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Copen, WV
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Copen, WV
- Average wind speed in September: 4.3mph
The windiest months (with the highest average wind speed) are January and February (6.6mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Copen, WV
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are June, July, August and November (77%).
Average rainfall in September
Copen, WV
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in September
Copen, WV
- Average rainfall days in September: 14.7 days
The month with the highest number of rainy days is May (20.9 days).
The month with the least rainy days is November (11.7 days).
Average snowfall in September
Copen, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (6.22").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Copen, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.4 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
Copen, WV
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Copen, WV
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is October (15 days).
The month with the least sunshine days is January (7.9 days).
Average UV index in September
Copen, WV
- Average UV index in September: 4
The months with the highest UV index are 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
Copen, WV
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Copen, WV
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The month with the lowest visibility is January (4mi).
Copen, West Virginia, USA
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