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
With the commencement of September, Triadelphia records a moderate temperature decline, with the average high easing from August's 82°F (27.8°C) to a still moderately hot 75.7°F (24.3°C). Nighttime temperature in Triadelphia experiences an average drop to a cool 54.9°F (12.7°C) in September.Humidity
The average relative humidity in September is 79%.Rainfall
In September, the rain falls for 13.2 days. Throughout September, 1.93" (49mm) of precipitation is accumulated. In Triadelphia, during the entire year, the rain falls for 166.3 days and collects up to 25.94" (659mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Triadelphia, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:50 am and sunset at 7:53 pm. On the last day of September, in Triadelphia, sunrise is at 7:18 am and sunset at 7:05 pm EDT.
Sunshine
The average sunshine in September in Triadelphia, West Virginia, is 8.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Triadelphia in September?
What is the average humidity in September in Triadelphia?
How much does it rain in Triadelphia in September?
When it does not snow in Triadelphia?
What is the average length of the day in September in Triadelphia?
What time are sunrise and sunset in September in Triadelphia?
How long on average sun shines in September in Triadelphia?
How high is the UV index in September in Triadelphia?
Average temperature in September
Triadelphia, WV
- Average high temperature in September: 75.7°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 (33.6°F).
- Average low temperature in September: 54.9°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in September
Triadelphia, WV
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Triadelphia, WV
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.6mph).
Average humidity in September
Triadelphia, WV
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are April and August (77%).
Average rainfall in September
Triadelphia, WV
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is November (1.69").
Average rainfall days in September
Triadelphia, WV
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in September
Triadelphia, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.66").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Triadelphia, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Triadelphia, WV
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Triadelphia, WV
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is February (9.4 days).
Average UV index in September
Triadelphia, WV
- Average UV index in September: 4
The months with the highest UV index are May, June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Triadelphia, WV
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Triadelphia, 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 and February (4mi).
Triadelphia, West Virginia, USA
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