September weather forecastRosemont, WV
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Rosemont, West Virginia, with an average temperature varying between 54.7°F (12.6°C) and 76.1°F (24.5°C).Temperature
September ushers in a minute temperature change, with average high-temperatures reducing from August's warm 81.7°F (27.6°C) to a still moderately hot 76.1°F (24.5°C). An average low-temperature of 54.7°F (12.6°C) is observed in Rosemont, West Virginia, during the September nights.Humidity
The average relative humidity in September is 78%.Rainfall
September and November are months with the least rain when the rain falls for 15.8 days and typically aggregates up to 2.2" (56mm) of rain.Snowfall
In Rosemont, 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 6:49 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:04 pm EDT.
Sunshine
In September, the average sunshine in Rosemont is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rosemont, WV
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in September: 54.7°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in September
Rosemont, WV
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Rosemont, WV
- Average wind speed in September: 4.5mph
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 (4.1mph).
Average humidity in September
Rosemont, WV
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are August and November (77%).
Average rainfall in September
Rosemont, WV
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is May (4.41").
The driest months (with the least rainfall) are September and November (2.2").
Average rainfall days in September
Rosemont, WV
- Average rainfall days in September: 15.8 days
The month with the highest number of rainy days is May (21.8 days).
The month with the least rainy days is February (10.8 days).
Average snowfall in September
Rosemont, WV
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.73").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rosemont, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rosemont, 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 48min
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 18min).
Average sunshine days in September
Rosemont, WV
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is November (14.7 days).
The month with the least sunshine days is May (7.7 days).
Average UV index in September
Rosemont, WV
- Average UV index in September: 4
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Rosemont, WV
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Rosemont, WV
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is January (4mi).
