September weather forecastRapidan, VA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Rapidan, Virginia, with an average temperature fluctuating between 79.2°F (26.2°C) and 59.2°F (15.1°C).Temperature
In September, the average high-temperature marginally drops from a tropical 86°F (30°C) in August to a warm 79.2°F (26.2°C). In Rapidan, an average low-temperature of 59.2°F (15.1°C) is recorded during September nights.Humidity
In September, the average relative humidity is 76%.Rainfall
January and September are months with the least rain when the rain falls for 13.2 days and typically aggregates up to 1.85" (47mm) of rain.Snowfall
May through October are months without snowfall in Rapidan, Virginia.Daylight
In Rapidan, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:56 pm EDT.
Sunshine
In Rapidan, the average sunshine in September is 8.8h.UV index
In Rapidan, the average daily maximum UV index in September is 5. 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: The UV index of 5 in September translates into these instructions:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rapidan, VA
- Average high temperature in September: 79.2°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in September: 59.2°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure in September
Rapidan, VA
- 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 (29.96"Hg).
Average wind speed in September
Rapidan, VA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in September
Rapidan, VA
- Average humidity in September: 76%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (71%).
Average rainfall in September
Rapidan, VA
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is April (2.95").
The driest months (with the least rainfall) are January and September (1.85").
Average rainfall days in September
Rapidan, VA
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in September
Rapidan, VA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.99").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Rapidan, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.9 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
Rapidan, VA
- 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 48min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Rapidan, VA
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.7 days).
Average UV index in September
Rapidan, VA
- Average UV index in September: 5
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
Rapidan, VA
- Average cloud cover in September: 38
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Rapidan, VA
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are January, May and September (5mi).
