September weather forecast
Chester Gap, VA

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Weather in September

September, the first month of the autumn in Chester Gap, is still a warm month, with an average temperature ranging between max 76.3°F (24.6°C) and min 56.7°F (13.7°C).

Temperature

The average high-temperature shows a slight dip in September, from August's warm 83.8°F (28.8°C) to a still moderately hot 76.3°F (24.6°C). Throughout September, Chester Gap anticipates an average low-temperature of 56.7°F (13.7°C).

Humidity

In Chester Gap, the average relative humidity in September is 78%.

Rainfall

In Chester Gap, Virginia, in September, during 13.6 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. In Chester Gap, during the entire year, the rain falls for 166.6 days and collects up to 29.57" (751mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of September, sunrise is at 6:42 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:56 pm EDT.

Sunshine

The average sunshine in September is 8.6h.

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: A typical high UV index of 4 in September suggests the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Boost your sun resistance with garments that are densely woven yet spacious.
Updated: Jun 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Chester Gap in September?

The average high-temperature, in September, in Chester Gap, is 76.3°F (24.6°C), while the average low-temperature is 56.7°F (13.7°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, in August is evaluated at 91.4°F (33°C).

What is the average humidity in September?

In September, the average relative humidity is 78%.

How many days does it rain in September?

In Chester Gap, in September, during 13.6 rainfall days, 2.01" (51mm) of precipitation is typically accumulated.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

In Chester Gap, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Chester Gap have in September?

The average day length in September is 12h and 26min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:42 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:56 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.6h.

What is the UV index intensity in September?

In Chester Gap, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes 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
Chester Gap, VA

Average temperature in September - Chester Gap, VA
  • Average high temperature in September: 76.3°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in September: 56.7°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in September
Chester Gap, VA

Average pressure in September - Chester Gap, VA
  • Average pressure in September: 30.06"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
Chester Gap, VA

Average wind speed in September - Chester Gap, VA
  • Average wind speed in September: 4.6mph

The windiest month (with the highest average wind speed) is March (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

Average humidity in September
Chester Gap, VA

Average humidity in September - Chester Gap, VA
  • Average humidity in September: 78%

The month with the highest relative humidity is October (79%).
The months with the lowest relative humidity are April, June and July (74%).

Average rainfall in September
Chester Gap, VA

Average rainfall in September - Chester Gap, VA
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is January (1.85").

Average rainfall days in September
Chester Gap, VA

Average rainfall days in September - Chester Gap, VA
  • Average rainfall days in September: 13.6 days

The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (9.3 days).

Average snowfall in September
Chester Gap, VA

Average snowfall in September - Chester Gap, VA
  • Average snowfall in September: 0"

The month with the highest snowfall is March (3.82").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Chester Gap, VA

Average snowfall days in September - Chester Gap, VA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Chester Gap, VA

Average daylight in September / Average sunshine in September - Chester Gap, VA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 8h and 4min

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 0min).

Average sunshine days in September
Chester Gap, VA

Average sunshine days in September - Chester Gap, VA
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (19.1 days).
The months with the least sunshine days are May and July (10.8 days).

Average UV index in September
Chester Gap, VA

Average UV index in September - Chester Gap, VA
  • Average UV index in September: 4

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).

Average cloud cover in September
Chester Gap, VA

Average cloud cover in September - Chester Gap, 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 31).

Average visibility in September
Chester Gap, VA

Average visibility in September - Chester Gap, VA
  • Average visibility in September: 5mi

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

Chester Gap, Virginia, USA

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