September weather forecast
Charles Town, WV

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Weather in September

Summer transitions to fall in September, with a notable decrease in temperatures relative to August. The changing season brings reduced daylight and sunshine hours, hinting at the upcoming autumnal equinox. Minimalistic rainfall is noticeable, and cloud cover begins to increase. The pleasant weather compliments the city's scenic autumn foliage beautifully, making September an enchanting time to visit Charles Town.

Temperature

With the onset of September, Charles Town's climate undergoes a slight change as the average high-temperature moves from 84°F (28.9°C) in August to a still warm 77°F (25°C). Charles Town's average low-temperature during September nights is observed to be a mild 56.8°F (13.8°C).

Humidity

The average relative humidity in September in Charles Town is 77%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.1 days and accumulates 1.89" (48mm) of precipitation.

Snowfall

June through October are months without snowfall in Charles Town.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of the month, sunrise is at 6:40 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:55 pm EDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

In September, the average daily maximum UV index in Charles Town is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 4 suggests this advice:
Undertake precautions - Guarding against sun damage is counselled. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
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Frequently asked questions

What are the temperatures in Charles Town in September?

Charles Town in September has an average high-temperature of 77°F (25°C) and an average low-temperature of 56.8°F (13.8°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is appraised at 91.4°F (33°C).

What is the average humidity in September in Charles Town?

The average relative humidity in September in Charles Town, West Virginia, is 77%.

What is the driest month in Charles Town?

The month with the least rainfall is September, when the rain falls for 12.1 days and typically collects 1.89" (48mm) of precipitation.

How much does it rain in Charles Town in September?

In Charles Town, during September, the rain falls for 12.1 days and regularly aggregates up to 1.89" (48mm) of precipitation.

When it does not snow in Charles Town?

In Charles Town, snow does not fall in June through October.

What is the average length of the day in September in Charles Town?

In September, the average day length is 12h and 26min.

What time are sunrise and sunset in September in Charles Town?

In September, on the first day of the month, sunrise is at 6:40 am and sunset at 7:41 pm. On the last day of the month, in Charles Town, West Virginia, sunrise is at 7:07 am and sunset at 6:55 pm EDT.

How many hours of sunshine does Charles Town have in September?

The average sunshine duration in September in Charles Town is 8.9h.

What is the UV index reading in September in Charles Town?

In September, the average daily maximum UV index in Charles Town is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to 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
Charles Town, WV

Average temperature in September - Charles Town, WV
  • Average high temperature in September: 77°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in September: 56.8°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).

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Average pressure in September
Charles Town, WV

Average pressure in September - Charles Town, WV
  • 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).

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Average wind speed in September
Charles Town, WV

Average wind speed in September - Charles Town, WV
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is March (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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Average humidity in September
Charles Town, WV

Average humidity in September - Charles Town, WV
  • Average humidity in September: 77%

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

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Average rainfall in September
Charles Town, WV

Average rainfall in September - Charles Town, WV
  • Average rainfall in September: 1.89"

The wettest months (with the highest rainfall) are May, July and August (3.15").
The driest month (with the least rainfall) is September (1.89").

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Average rainfall days in September
Charles Town, WV

Average rainfall days in September - Charles Town, WV
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (9.2 days).

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Average snowfall in September
Charles Town, WV

Average snowfall in September - Charles Town, WV
  • Average snowfall in September: 0"

The month with the highest snowfall is January (4.17").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Charles Town, WV

Average snowfall days in September - Charles Town, WV
  • 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, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Charles Town, WV

Average daylight in September / Average sunshine in September - Charles Town, WV
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).

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Average sunshine days in September
Charles Town, WV

Average sunshine days in September - Charles Town, WV
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (11.2 days).

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Average UV index in September
Charles Town, WV

Average UV index in September - Charles Town, WV
  • 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).

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Average cloud cover in September
Charles Town, WV

Average cloud cover in September - Charles Town, WV
  • Average cloud cover in September: 37

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in September
Charles Town, WV

Average visibility in September - Charles Town, WV
  • Average visibility in September: 5mi

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

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Charles Town, West Virginia, USA

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