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
September signifies a gentle decline in Flat Top's average high-temperature, easing from a warm 80.4°F (26.9°C) in August to a still moderately hot 74.8°F (23.8°C). Nighttime in September brings a stark departure from the daily high, resting at an average low-temperature of 52.7°F (11.5°C).Humidity
In Flat Top, the average relative humidity in September is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 15.5 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 25min.On the first day of the month, sunrise is at 6:55 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:08 pm EDT.
Sunshine
In September, the average sunshine is 8.2h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Heed the precautions - Suggestions to avoid sunburn are made. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in Flat Top in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Flat Top have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Flat Top have in September?
What is the UV index intensity in September?
Average temperature in September
Flat Top, WV
- Average high temperature in September: 74.8°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in September
Flat Top, 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
Flat Top, WV
- Average wind speed in September: 4.5mph
The windiest months (with the highest average wind speed) are January and February (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Flat Top, WV
- Average humidity in September: 80%
The month with the highest relative humidity is February (83%).
The months with the lowest relative humidity are April, June, July, August and November (78%).
Average rainfall in September
Flat Top, WV
- Average rainfall in September: 1.69"
The wettest months (with the highest rainfall) are February and May (3.5").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in September
Flat Top, WV
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is May (20.5 days).
The month with the least rainy days is February (9.9 days).
Average snowfall in September
Flat Top, WV
- Average snowfall in September: 0"
The month with the highest snowfall is February (9.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Flat Top, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Flat Top, 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 1min
The months with the most sunshine are June, July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Flat Top, WV
- Average sunshine days in September: 11.3 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is May (8.8 days).
Average UV index in September
Flat Top, WV
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Flat Top, WV
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 38).
Average visibility in September
Flat Top, WV
- Average visibility in September: 4mi
The months with the highest visibility are March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February and September (4mi).
Flat Top, West Virginia, USA
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