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 September's onset, the weather reveals a slight temperature decrease, transitioning from a warm 77.9°F (25.5°C) in August to a pleasant 72.1°F (22.3°C). Terra Alta encounters a steady low-temperature average of 52.5°F (11.4°C) throughout the month of September.Humidity
In Terra Alta, the average relative humidity in September is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 14.5 days and typically collects 1.69" (43mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:47 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:01 pm EDT.
Sunshine
In September, the average sunshine is 8.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 4 during September leads to these advisories:
Guard yourself - Avoiding sunburn is suggested. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Terra Alta?
What is the average humidity in September?
What is the driest month in Terra Alta?
How many days does it rain in September in Terra Alta?
When it does not snow?
Does it snow in September?
How many hours of daylight does Terra Alta have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Terra Alta have in September?
What is the UV index intensity in September?
Average temperature in September
Terra Alta, WV
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (32.4°F).
- Average low temperature in September: 52.5°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in September
Terra Alta, WV
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Terra Alta, WV
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Terra Alta, WV
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are June and July (79%).
Average rainfall in September
Terra Alta, WV
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in September
Terra Alta, WV
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is May (21 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in September
Terra Alta, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (7.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Terra Alta, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Terra Alta, WV
- Average daylight in September: 12h and 2min
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 24min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in September
Terra Alta, WV
- Average sunshine days in September: 13 days
The month with the most sunshine days is November (13.6 days).
The month with the least sunshine days is January (6.9 days).
Average UV index in September
Terra Alta, WV
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Terra Alta, WV
- Average cloud cover in September: 45
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 41).
Average visibility in September
Terra Alta, WV
- Average visibility in September: 4mi
The months with the highest visibility are March, April, May, June, July, August and November (5mi).
The months with the lowest visibility are January, February, September, October and December (4mi).
Terra Alta, West Virginia, USA
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