September weather forecastHighland Springs, VA
September
Weather in September
September, the first month of the autumn in Highland Springs, is still a warm month, with an average temperature varying between 81.3°F (27.4°C) and 63.3°F (17.4°C).Temperature
The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a tropical 88°F (31.1°C) in August to a moderately hot 81.3°F (27.4°C). In Highland Springs, the nighttime temperature averages to an enjoyable 63.3°F (17.4°C) during September.Heat index
In September, the average heat index is evaluated at a tropical 86°F (30°C). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.For clarity, heat index numbers account for light winds and areas under shade. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely significant for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
In September, the average relative humidity is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.5 days and typically collects 1.1" (28mm) of precipitation.Snowfall
In Highland Springs, snow does not fall in May through October.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:40 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:53 pm EDT.
Sunshine
In Highland Springs, the average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index in Highland Springs is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Highland Springs, VA
- Average high temperature in September: 81.3°F
The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (44.8°F).
- Average low temperature in September: 63.3°F
The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).
Average pressure in September
Highland Springs, VA
- Average pressure in September: 30.04"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
Highland Springs, VA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Highland Springs, VA
- Average humidity in September: 74%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (69%).
Average rainfall in September
Highland Springs, VA
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is August (2.05").
The driest month (with the least rainfall) is September (1.1").
Average rainfall days in September
Highland Springs, VA
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (14.8 days).
The months with the least rainy days are October and November (8.2 days).
Average snowfall in September
Highland Springs, VA
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.67").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Highland Springs, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.4 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
Highland Springs, VA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).
Average sunshine days in September
Highland Springs, VA
- Average sunshine days in September: 18.6 days
The months with the most sunshine days are October and December (21.4 days).
The month with the least sunshine days is May (14.4 days).
Average UV index in September
Highland Springs, VA
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Highland Springs, VA
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Highland Springs, VA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
