September weather forecastSummerlee, WV
September
Weather in September
September, the first month of the autumn in Summerlee, is still a warm month, with an average temperature fluctuating between 74.8°F (23.8°C) and 54.1°F (12.3°C).Temperature
Summerlee's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's warm 80.8°F (27.1°C) to a still moderately hot 74.8°F (23.8°C). Nighttime temperature lowers to an average of 54.1°F (12.3°C) in September.Humidity
The average relative humidity in September is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 16.2 days and typically collects 2.01" (51mm) of precipitation.Snowfall
In Summerlee, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 25min.On the first day of September in Summerlee, sunrise is at 6:55 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:08 pm EDT.
Sunshine
The average sunshine in September is 8.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Be vigilant - Preventing sunburn is recommended. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Summerlee, WV
- Average high temperature in September: 74.8°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in September
Summerlee, 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
Summerlee, WV
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are January and February (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Summerlee, WV
- Average humidity in September: 80%
The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are June, July, August and November (78%).
Average rainfall in September
Summerlee, WV
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in September
Summerlee, WV
- Average rainfall days in September: 16.2 days
The month with the highest number of rainy days is May (21.8 days).
The months with the least rainy days are February and November (10.5 days).
Average snowfall in September
Summerlee, WV
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.48").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Summerlee, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Summerlee, 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 6min
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 36min).
Average sunshine days in September
Summerlee, WV
- Average sunshine days in September: 11.2 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is May (7.8 days).
Average UV index in September
Summerlee, 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
Summerlee, WV
- Average cloud cover in September: 42
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Summerlee, WV
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
