September weather forecastPorterwood, WV
September
Weather in September
September, the first month of the autumn in Porterwood, is still a pleasant month, with an average temperature varying between 72°F (22.2°C) and 52°F (11.1°C).Temperature
Porterwood's September weather shows a modest shift in high-temperatures, falling from August's warm 77.9°F (25.5°C) to a pleasant 72°F (22.2°C). Throughout the month of September, Porterwood observes an average nighttime temperature of 52°F (11.1°C).Humidity
In September, the average relative humidity is 81%.Rainfall
The month with the least rainfall is September, when the rain falls for 15.3 days and typically collects 2.17" (55mm) of precipitation.Snowfall
In Porterwood, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:48 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:02 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, the UV index of 4 transforms into the following advice:
Make use of precautions - It is urged to ward off sun damage. It's recommended to limit sun exposure when its radiation is at its peak during midday. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Porterwood, WV
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in September
Porterwood, 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
Porterwood, WV
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are January and February (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Porterwood, WV
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are June, July and November (79%).
Average rainfall in September
Porterwood, WV
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is September (2.17").
Average rainfall days in September
Porterwood, WV
- Average rainfall days in September: 15.3 days
The month with the highest number of rainy days is May (22 days).
The month with the least rainy days is February (11.2 days).
Average snowfall in September
Porterwood, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (8.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Porterwood, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Porterwood, WV
- Average daylight in September: 12h and 24min
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 30min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Porterwood, WV
- Average sunshine days in September: 12.4 days
The months with the most sunshine days are October and November (13.3 days).
The month with the least sunshine days is January (6.5 days).
Average UV index in September
Porterwood, WV
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Porterwood, WV
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in September
Porterwood, 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).
