September weather forecast
Quantico, VA

Weather in September

September, the first month of the autumn in Quantico, is still a warm month, with an average temperature fluctuating between 79.3°F (26.3°C) and 61°F (16.1°C).

Temperature

In September, the average high-temperature slightly decreases from a hot 86.2°F (30.1°C) in August to a moderately hot 79.3°F (26.3°C). In Quantico, the average low-temperature is 61°F (16.1°C).

Humidity

The average relative humidity in September in Quantico, Virginia, is 76%.

Rainfall

In Quantico, Virginia, it is raining for 11.5 days, with typically 2.05" (52mm) of accumulated precipitation. In Quantico, during the entire year, the rain falls for 155.6 days and collects up to 31.61" (803mm) of precipitation.

Snowfall

In Quantico, Virginia, snow does not fall in May through October.

Daylight

In September, the average length of the day is 12h and 25min.
On the first day of September in Quantico, sunrise is at 6:38 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:53 pm EDT.

Sunshine

In Quantico, Virginia, the average sunshine in September is 8.6h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Quantico?

The average high-temperature, in September, in Quantico, is 79.3°F (26.3°C), while the average low-temperature is 61°F (16.1°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, in August is appraised at 98.6°F (37°C).

What is the average humidity in September in Quantico?

In Quantico, Virginia, the average relative humidity in September is 76%.

How many days does it rain in September in Quantico?

In Quantico, Virginia, in September, during 11.5 rainfall days, 2.05" (52mm) of precipitation is typically accumulated.

When it does not snow in Quantico?

In Quantico, Virginia, snow does not fall in May through October.

What is the average length of the day in September in Quantico?

The average day length in September is 12h and 25min.

When is the sunrise / sunset in September in Quantico?

On the first day of September in Quantico, sunrise is at 6:38 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:53 pm EDT.

How long on average sun shines in September in Quantico?

The average sunshine duration in September is 8.6h.

What is the UV index reading in September in Quantico?

In Quantico, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Quantico, VA

Average temperature in September - Quantico, VA
  • Average high temperature in September: 79.3°F

The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in September: 61°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).

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Average pressure in September
Quantico, VA

Average pressure in September - Quantico, 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 (29.95"Hg).

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Average wind speed in September
Quantico, VA

Average wind speed in September - Quantico, VA
  • Average wind speed in September: 5.3mph

The windiest months (with the highest average wind speed) are March and April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in September
Quantico, VA

Average humidity in September - Quantico, VA
  • Average humidity in September: 76%

The months with the highest relative humidity are October and December (78%).
The months with the lowest relative humidity are January, April and July (73%).

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Average rainfall in September
Quantico, VA

Average rainfall in September - Quantico, VA
  • Average rainfall in September: 2.05"

The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is January (1.97").

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Average rainfall days in September
Quantico, VA

Average rainfall days in September - Quantico, VA
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is November (8.7 days).

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Average snowfall in September
Quantico, VA

Average snowfall in September - Quantico, VA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.52").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Quantico, VA

Average snowfall days in September - Quantico, 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).

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Average daylight in September /
Average sunshine in September
Quantico, VA

Average daylight in September / Average sunshine in September - Quantico, VA
  • Average daylight in September: 12h and 25min

The month with the longest days is June (Average daylight: 14h and 49min).
The month with the shortest days is December (Average daylight: 9h and 32min).

  • Average sunshine in September: 8h and 36min

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 6min).

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Average sunshine days in September
Quantico, VA

Average sunshine days in September - Quantico, VA
  • Average sunshine days in September: 17.2 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (11.5 days).

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Average UV index in September
Quantico, VA

Average UV index in September - Quantico, 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).

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Average cloud cover in September
Quantico, VA

Average cloud cover in September - Quantico, VA
  • Average cloud cover in September: 39

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

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Average visibility in September
Quantico, VA

Average visibility in September - Quantico, VA
  • Average visibility in September: 5mi

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

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