September weather forecast
Henry Clay Heights, VA

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Weather in September

September, the first month of the autumn in Henry Clay Heights, is still a warm month, with an average temperature varying between 62.2°F (16.8°C) and 80.8°F (27.1°C).

Temperature

With September's onset, the weather reveals a slight temperature decrease, transitioning from a hot 87.8°F (31°C) in August to a moderately hot 80.8°F (27.1°C). Henry Clay Heights's temperature tends to fall to an average low of 62.2°F (16.8°C) during the nights of September.

Heat index

The heat index value for September is estimated at 84.2°F (29°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.

Humidity

The average relative humidity in September is 75%.

Rainfall

The month with the least rainfall is September, when the rain falls for 11.6 days and typically collects 1.69" (43mm) of precipitation.

Snowfall

In Henry Clay Heights, 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 the month, sunrise is at 6:40 am and sunset at 7:38 pm. On the last day of September, sunrise is at 7:04 am and sunset at 6:53 pm EDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

In Henry Clay Heights, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 in September transforms into the following instructions:
Put precautions into practice - Protective measures against sun-induced damage are advised. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

In Henry Clay Heights, 80.8°F (27.1°C) is the average high-temperature and 62.2°F (16.8°C) is the average low-temperature during September. The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in September is estimated at 84.2°F (29°C).

What is the average humidity in September?

In Henry Clay Heights, the average relative humidity in September is 75%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 11.6 days and typically collects 1.69" (43mm) of precipitation.

How much does it rain in September?

In Henry Clay Heights, in September, it is raining for 11.6 days, with typically 1.69" (43mm) of accumulated precipitation.

When it does not snow?

May through October are months without snowfall.

How many hours of daylight does Henry Clay Heights have in September?

In September, the average day length is 12h and 25min.

When is the sunrise / sunset in September?

On the first day of September in Henry Clay Heights, 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.

How many hours of sunshine does Henry Clay Heights have in September?

In Henry Clay Heights, the average sunshine duration in September is 8.8h.

What is the UV index intensity in September?

In Henry Clay Heights, Virginia, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Henry Clay Heights, VA

Average temperature in September - Henry Clay Heights, VA
  • Average high temperature in September: 80.8°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 (43.9°F).

  • Average low temperature in September: 62.2°F

The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (28.9°F).

Average pressure in September
Henry Clay Heights, VA

Average pressure in September - Henry Clay Heights, 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
Henry Clay Heights, VA

Average wind speed in September - Henry Clay Heights, VA
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in September
Henry Clay Heights, VA

Average humidity in September - Henry Clay Heights, VA
  • Average humidity in September: 75%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (69%).

Average rainfall in September
Henry Clay Heights, VA

Average rainfall in September - Henry Clay Heights, VA
  • Average rainfall in September: 1.69"

The wettest month (with the highest rainfall) is August (2.83").
The driest month (with the least rainfall) is September (1.69").

Average rainfall days in September
Henry Clay Heights, VA

Average rainfall days in September - Henry Clay Heights, VA
  • Average rainfall days in September: 11.6 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is November (9.2 days).

Average snowfall in September
Henry Clay Heights, VA

Average snowfall in September - Henry Clay Heights, VA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.93").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Henry Clay Heights, VA

Average snowfall days in September - Henry Clay Heights, VA
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (3.8 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
Henry Clay Heights, VA

Average daylight in September / Average sunshine in September - Henry Clay Heights, VA
  • Average daylight in September: 12h and 2min

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 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

Average sunshine days in September
Henry Clay Heights, VA

Average sunshine days in September - Henry Clay Heights, VA
  • Average sunshine days in September: 15.8 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is May (11.7 days).

Average UV index in September
Henry Clay Heights, VA

Average UV index in September - Henry Clay Heights, VA
  • Average UV index in September: 5

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in September
Henry Clay Heights, VA

Average cloud cover in September - Henry Clay Heights, 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 32).

Average visibility in September
Henry Clay Heights, VA

Average visibility in September - Henry Clay Heights, VA
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are May and December (5mi).

Henry Clay Heights, Virginia, USA

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