September weather forecastNew Martinsville, WV
September
Weather in September
Serving as the gateway to fall, September experiences a substantial drop in temperature, averaging 76.6°F (24.8°C) for highs and 55.4°F (13°C) for lows. The rainfall is at its yearly low but the city compensates with prolonged sunshine days. The daylight hours continue to decrease, and the city is steadily cooled by the slight rise in wind speed. September’s weather balance offers a perfect blend of summer's end and fall's onset.Temperature
September's onset in New Martinsville introduces a mild reduction in the average high-temperature, from 82.8°F (28.2°C) in August to a still warm 76.6°F (24.8°C). During September, New Martinsville witnesses a consistent average low-temperature of 55.4°F (13°C).Humidity
The average relative humidity in September in New Martinsville is 79%.Rainfall
September is the month with the least rainfall in New Martinsville. Rain falls for 13.6 days and accumulates 1.61" (41mm) of precipitation.Snowfall
In New Martinsville, snow does not fall in May through October.Daylight
In New Martinsville, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:54 pm. On the last day of September, in New Martinsville, sunrise is at 7:19 am and sunset at 7:07 pm EDT.
Sunshine
In September, the average sunshine in New Martinsville is 8.4h.UV index
The average daily maximum UV index in September in New Martinsville, West Virginia, is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 4 during September leads to these instructions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
New Martinsville, WV
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in September: 55.4°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in September
New Martinsville, 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
New Martinsville, WV
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are January and February (7mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
New Martinsville, WV
- Average humidity in September: 79%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (77%).
Average rainfall in September
New Martinsville, WV
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in September
New Martinsville, WV
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is January (10.2 days).
Average snowfall in September
New Martinsville, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.19").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
New Martinsville, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
New Martinsville, 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 24min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
New Martinsville, WV
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is November (16.9 days).
The months with the least sunshine days are January and February (8.7 days).
Average UV index in September
New Martinsville, WV
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
New Martinsville, WV
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
New Martinsville, WV
- Average visibility in September: 5mi
The month with the highest visibility is November (6mi).
The month with the lowest visibility is January (4mi).
