September weather forecast
Alderson, West VA

Weather in September

September, the first month of the autumn in Alderson, is still a warm month, with an average temperature fluctuating between 52°F (11.1°C) and 73.4°F (23°C).

Temperature

In Alderson, West Virginia, the average high-temperature in September slightly decreases from a warm 79.9°F (26.6°C) in August to a still moderately hot 73.4°F (23°C). The average low-temperature, in Alderson, is 52°F (11.1°C).

Humidity

In Alderson, the average relative humidity in September is 81%.

Rainfall

The month with the least rainfall is September, when the rain falls for 15.5 days and typically collects 1.81" (46mm) of precipitation.

Snowfall

In Alderson, snow does not fall in June through September.

Daylight

In Alderson, the average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:52 am and sunset at 7:52 pm. On the last day of September, in Alderson, sunrise is at 7:17 am and sunset at 7:07 pm EDT.

Sunshine

In Alderson, the average sunshine in September is 8.1h.

UV index

In Alderson, West Virginia, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Alderson?

In September, in Alderson, the average high-temperature is 73.4°F (23°C), and the average low-temperature is 52°F (11.1°C). in July, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, is computed to be 86°F (30°C).

What is the average humidity in September in Alderson?

The average relative humidity in September in Alderson, West Virginia, is 81%.

What is the driest month in Alderson?

September is the month with the least rainfall in Alderson, West Virginia. Rain falls for 15.5 days and accumulates 1.81" (46mm) of precipitation.

How many days does it rain in September in Alderson?

In Alderson, in September, during 15.5 rainfall days, 1.81" (46mm) of precipitation is typically accumulated.

When it does not snow in Alderson?

June through September are months without snowfall in Alderson.

Does it snow in Alderson in September?

In Alderson, West Virginia, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Alderson have in September?

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

What time are sunrise and sunset in September in Alderson?

In September, on the first day of the month, sunrise is at 6:52 am and sunset at 7:52 pm. On the last day of the month, in Alderson, sunrise is at 7:17 am and sunset at 7:07 pm EDT.

How many hours of sunshine does Alderson have in September?

In Alderson, West Virginia, the average sunshine duration in September is 8.1h.

How high is the UV index in September in Alderson?

The average daily maximum UV index in September in Alderson is 4. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
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
Alderson, West VA

Average temperature in September - Alderson, West VA
  • Average high temperature in September: 73.4°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (36.3°F).

  • Average low temperature in September: 52°F

The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).

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Average pressure in September
Alderson, West VA

Average pressure in September - Alderson, West VA
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

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Average wind speed in September
Alderson, West VA

Average wind speed in September - Alderson, West VA
  • Average wind speed in September: 4.4mph

The windiest months (with the highest average wind speed) are January and February (7.3mph).
The calmest month (with the lowest average wind speed) is August (4mph).

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Average humidity in September
Alderson, West VA

Average humidity in September - Alderson, West VA
  • Average humidity in September: 81%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is June (78%).

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Average rainfall in September
Alderson, West VA

Average rainfall in September - Alderson, West VA
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days in September
Alderson, West VA

Average rainfall days in September - Alderson, West VA
  • Average rainfall days in September: 15.5 days

The month with the highest number of rainy days is May (22.2 days).
The month with the least rainy days is November (10.2 days).

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Average snowfall in September
Alderson, West VA

Average snowfall in September - Alderson, West VA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.43").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Alderson, West VA

Average snowfall days in September - Alderson, West VA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Alderson, West VA

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

The month with the longest days is June (Average daylight: 14h and 44min).
The month with the shortest days is December (Average daylight: 9h and 37min).

  • Average sunshine in September: 8h and 6min

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in September
Alderson, West VA

Average sunshine days in September - Alderson, West VA
  • Average sunshine days in September: 11.5 days

The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (7.7 days).

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Average UV index in September
Alderson, West VA

Average UV index in September - Alderson, West VA
  • Average UV index in September: 4

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
Alderson, West VA

Average cloud cover in September - Alderson, West VA
  • Average cloud cover in September: 45

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 40).

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Average visibility in September
Alderson, West VA

Average visibility in September - Alderson, West VA
  • Average visibility in September: 4mi

The months with the highest visibility are March, April, June, July, November and December (5mi).
The months with the lowest visibility are January, February, May, August, September and October (4mi).

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