September weather forecastPurcellville, VA
September
Weather in September
The first month of the autumn, September, is still a warm month in Purcellville, Virginia, with an average temperature fluctuating between 58.3°F (14.6°C) and 77.4°F (25.2°C).Temperature
The transition into September involves a small decrease in the average high-temperature, dipping slightly from 84.6°F (29.2°C) in August to a still moderately hot 77.4°F (25.2°C). Nightly temperatures drop to an average low of 58.3°F (14.6°C) in September.Humidity
In Purcellville, the average relative humidity in September is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.7 days and typically collects 1.93" (49mm) of precipitation.Snowfall
In Purcellville, snow does not fall in May through September.Daylight
In Purcellville, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:54 pm EDT.
Sunshine
In Purcellville, Virginia, the average sunshine in September is 8.9h.UV index
In Purcellville, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Purcellville, VA
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (38.7°F).
- Average low temperature in September: 58.3°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in September
Purcellville, VA
- 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 (29.95"Hg).
Average wind speed in September
Purcellville, VA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is March (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Purcellville, VA
- Average humidity in September: 77%
The months with the highest relative humidity are October and December (78%).
The month with the lowest relative humidity is July (73%).
Average rainfall in September
Purcellville, VA
- Average rainfall in September: 1.93"
The wettest months (with the highest rainfall) are May and August (3.35").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Purcellville, VA
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (10.1 days).
Average snowfall in September
Purcellville, VA
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Purcellville, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Purcellville, VA
- 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 54min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Purcellville, VA
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in September
Purcellville, VA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Purcellville, VA
- Average cloud cover in September: 36
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Purcellville, VA
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, June, July, August and November (6mi).
The months with the lowest visibility are January, May, September, October and December (5mi).
