September weather forecastDartmont, WV
September
Weather in September
The first month of the autumn, September, is still a warm month in Dartmont, West Virginia, with temperature in the range of an average low of 56.3°F (13.5°C) and an average high of 77.9°F (25.5°C).Temperature
The onset of September is marked by a minor decrease in temperature, transitioning from a moderately hot 84.2°F (29°C) in August to a still warm 77.9°F (25.5°C). Dartmont documents a substantial deviation from daytime highs with a consistent low-temperature of 56.3°F (13.5°C) during September nights.Humidity
In September, the average relative humidity is 77%.Rainfall
September is the month with the least rainfall. Rain falls for 13.5 days and accumulates 1.85" (47mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Dartmont is 12h and 25min.On the first day of September, sunrise is at 6:57 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:10 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 of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 4 in September leads to these recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Dartmont, WV
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in September
Dartmont, 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 (29.98"Hg).
Average wind speed in September
Dartmont, WV
- Average wind speed in September: 4.2mph
The windiest months (with the highest average wind speed) are January and February (6.6mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Dartmont, WV
- Average humidity in September: 77%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are June, July, August and November (76%).
Average rainfall in September
Dartmont, WV
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Dartmont, WV
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in September
Dartmont, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Dartmont, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dartmont, WV
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Dartmont, WV
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in September
Dartmont, WV
- Average UV index in September: 4
The months with the highest UV index are May, June and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Dartmont, WV
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Dartmont, 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, February, March, May, June, July, August, September, October and December (5mi).
