September weather forecastHighland Park, VA
September
Weather in September
September, the first month of the autumn in Highland Park, is also a moderately hot month, with an average temperature varying between 63.1°F (17.3°C) and 81°F (27.2°C).Temperature
The commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from a tropical 87.6°F (30.9°C) in August to a warm 81°F (27.2°C). Throughout the month of September, Highland Park witnesses an average temperature of 63.1°F (17.3°C).Heat index
The average heat index in September is calculated to be a hot 86°F (30°C). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Humidity
In Highland Park, Virginia, the average relative humidity in September is 76%.Rainfall
The month with the least rainfall in Highland Park is September, when the rain falls for 8.5 days and typically collects 0.47" (12mm) of precipitation.Snowfall
In Highland Park, Virginia, snow does not fall in April through October.Daylight
In September, the average length of the day in Highland Park is 12h and 25min.On the first day of September in Highland Park, Virginia, sunrise is at 6:40 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:53 pm EDT.
Sunshine
The average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index in Highland Park is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: An average maximum UV index of 5 in September leads to these recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Highland Park, VA
- Average high temperature in September: 81°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in September: 63.1°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (30°F).
Average pressure in September
Highland Park, 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 Park, VA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Highland Park, 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
Highland Park, VA
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is August (1.02").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in September
Highland Park, VA
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in September
Highland Park, VA
- Average snowfall in September: 0"
The months with the highest snowfall are January, February and March (0.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Highland Park, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.5 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 Park, 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 54min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 5h and 24min).
Average sunshine days in September
Highland Park, VA
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is October (23.1 days).
The month with the least sunshine days is May (16.2 days).
Average UV index in September
Highland Park, VA
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Highland Park, VA
- Average cloud cover in September: 38
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Highland Park, 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).
