September weather forecast
Sinclair Manor, VA

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Weather in September

The first month of the autumn, September, is still a warm month in Sinclair Manor, Virginia, with temperature in the range of an average low of 62.8°F (17.1°C) and an average high of 80.6°F (27°C).

Temperature

Start of September brings a slight shift in the average high-temperature, dipping a bit from August's hot 87.4°F (30.8°C) to a moderately hot 80.6°F (27°C). The month of September records an average low-temperature of 62.8°F (17.1°C).

Heat index

September's heat index is computed to be 84.2°F (29°C). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.
Factoring in the heat index, values are geared towards shaded areas with light breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.

Humidity

In September, the average relative humidity is 76%.

Rainfall

The month with the least rainfall in Sinclair Manor is September, when the rain falls for 11.9 days and typically collects 1.77" (45mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In September, the average length of the day is 12h and 25min.
On the first day of the month, sunrise is at 6:39 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:04 am and sunset at 6:53 pm EDT.

Sunshine

In September, the average sunshine in Sinclair Manor is 8.8h.

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: An average maximum UV index of 5 in September leads to these recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Sinclair Manor in September?

Sinclair Manor in September has an average high-temperature of 80.6°F (27°C) and an average low-temperature of 62.8°F (17.1°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in September is computed to be 84.2°F (29°C).

What is the average humidity in September?

The average relative humidity in September is 76%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 11.9 days and accumulates 1.77" (45mm) of precipitation.

How much does it rain in September?

In September, the rain falls for 11.9 days. Throughout September, 1.77" (45mm) of precipitation is accumulated.

When it does not snow?

In Sinclair Manor, snow does not fall in May through October.

How many hours of daylight does Sinclair Manor have in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:39 am and sunset at 7:37 pm. On the last day of the month, in Sinclair Manor, sunrise is at 7:04 am and sunset at 6:53 pm EDT.

How many hours of sunshine does Sinclair Manor have in September?

The average sunshine duration in September is 8.8h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Sinclair Manor, VA

Average temperature in September - Sinclair Manor, VA
  • Average high temperature in September: 80.6°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (44.2°F).

  • Average low temperature in September: 62.8°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 (29.3°F).

Average pressure in September
Sinclair Manor, VA

Average pressure in September - Sinclair Manor, 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
Sinclair Manor, VA

Average wind speed in September - Sinclair Manor, VA
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in September
Sinclair Manor, VA

Average humidity in September - Sinclair Manor, VA
  • Average humidity in September: 76%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is July (71%).

Average rainfall in September
Sinclair Manor, VA

Average rainfall in September - Sinclair Manor, VA
  • Average rainfall in September: 1.77"

The wettest month (with the highest rainfall) is August (2.99").
The driest month (with the least rainfall) is September (1.77").

Average rainfall days in September
Sinclair Manor, VA

Average rainfall days in September - Sinclair Manor, VA
  • Average rainfall days in September: 11.9 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (9.8 days).

Average snowfall in September
Sinclair Manor, VA

Average snowfall in September - Sinclair Manor, VA
  • Average snowfall in September: 0"

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

Average snowfall days in September
Sinclair Manor, VA

Average snowfall days in September - Sinclair Manor, VA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (3.9 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
Sinclair Manor, VA

Average daylight in September / Average sunshine in September - Sinclair Manor, 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 months with the least sunshine are February and December (Average sunshine: 5h and 18min).

Average sunshine days in September
Sinclair Manor, VA

Average sunshine days in September - Sinclair Manor, VA
  • Average sunshine days in September: 16.7 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).

Average UV index in September
Sinclair Manor, VA

Average UV index in September - Sinclair Manor, 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 and December (UV index 2).

Average cloud cover in September
Sinclair Manor, VA

Average cloud cover in September - Sinclair Manor, VA
  • Average cloud cover in September: 38

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in September
Sinclair Manor, VA

Average visibility in September - Sinclair Manor, 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).

Sinclair Manor, Virginia, USA

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