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
The arrival of September corresponds with a light shift in temperature, down from 82°F (27.8°C) in August to a still moderately hot 75.9°F (24.4°C). Throughout September nights, Stephenson reports a steady thermal contrast from the day, with an average low-temperature of 54.1°F (12.3°C).Humidity
The average relative humidity in September in Stephenson is 78%.Rainfall
The month with the least rainfall is September, when the rain falls for 15.5 days and typically collects 1.57" (40mm) of precipitation.Snowfall
In Stephenson, snow does not fall in June through September.Daylight
In September, the average length of the day in Stephenson is 12h and 25min.On the first day of the month, sunrise is at 6:56 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:09 pm EDT.
Sunshine
The average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Stephenson?
What is the average humidity in September in Stephenson?
What is the driest month in Stephenson?
How much does it rain in Stephenson in September?
When it does not snow in Stephenson?
Does it snow in Stephenson in September?
What is the average length of the day in September in Stephenson?
When are sunrise and sunset in September in Stephenson?
How long on average sun shines in September in Stephenson?
What is the UV index reading in September in Stephenson?
Average temperature in September
Stephenson, WV
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in September
Stephenson, 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 (29.99"Hg).
Average wind speed in September
Stephenson, WV
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is January (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Stephenson, WV
- Average humidity in September: 78%
The month with the highest relative humidity is February (83%).
The months with the lowest relative humidity are June, July, August and November (77%).
Average rainfall in September
Stephenson, WV
- Average rainfall in September: 1.57"
The wettest months (with the highest rainfall) are February and May (3.43").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in September
Stephenson, WV
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is November (11.3 days).
Average snowfall in September
Stephenson, WV
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Stephenson, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Stephenson, 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 6min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Stephenson, WV
- Average sunshine days in September: 12.1 days
The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in September
Stephenson, 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, November and December (UV index 2).
Average cloud cover in September
Stephenson, WV
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Stephenson, WV
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Stephenson, West Virginia, USA
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