September weather forecast
Lyonsville, WV

Share

Weather in September

September, the first month of the autumn in Lyonsville, is still a warm month, with temperature in the range of an average high of 75.7°F (24.3°C) and an average low of 54.1°F (12.3°C).

Temperature

As September begins, there is a minor decrease in the average high-temperature, softly falling from a warm 81.5°F (27.5°C) in August to a still moderately hot 75.7°F (24.3°C). Lyonsville's average nighttime temperature descends significantly from the day's peak in September, settling at a cool 54.1°F (12.3°C).

Humidity

The average relative humidity in September is 79%.

Rainfall

The month with the least rainfall is September, when the rain falls for 15.1 days and typically collects 1.54" (39mm) of precipitation.

Snowfall

June through September 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 6:54 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:08 pm EDT.

Sunshine

The average sunshine in September is 8.3h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Boost your sun resistance with garments that are densely woven yet spacious.
Updated: Jun 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

In Lyonsville, 75.7°F (24.3°C) is the average high-temperature and 54.1°F (12.3°C) is the average low-temperature during September. In August, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is computed to be 87.8°F (31°C).

What is the average humidity in September?

The average relative humidity in September is 79%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 15.1 days and accumulates 1.54" (39mm) of precipitation.

How many days does it rain in September in Lyonsville?

In Lyonsville, in September, during 15.1 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

When it does not snow in Lyonsville?

June through September are months without snowfall.

Does it snow in September?

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

What is the average length of the day in September?

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

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:54 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:08 pm EDT.

How many hours of sunshine does Lyonsville have in September?

In Lyonsville, the average sunshine duration in September is 8.3h.

What is the UV index intensity in September?

In Lyonsville, the average daily maximum UV index in September is 4. 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
Lyonsville, WV

Average temperature in September - Lyonsville, WV
  • Average high temperature in September: 75.7°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in September: 54.1°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).

Average pressure in September
Lyonsville, WV

Average pressure in September - Lyonsville, WV
  • 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).

Average wind speed in September
Lyonsville, WV

Average wind speed in September - Lyonsville, WV
  • Average wind speed in September: 4.5mph

The windiest month (with the highest average wind speed) is February (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

Average humidity in September
Lyonsville, WV

Average humidity in September - Lyonsville, WV
  • Average humidity in September: 79%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is June (77%).

Average rainfall in September
Lyonsville, WV

Average rainfall in September - Lyonsville, WV
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is September (1.54").

Average rainfall days in September
Lyonsville, WV

Average rainfall days in September - Lyonsville, WV
  • Average rainfall days in September: 15.1 days

The month with the highest number of rainy days is May (20.4 days).
The month with the least rainy days is November (11 days).

Average snowfall in September
Lyonsville, WV

Average snowfall in September - Lyonsville, WV
  • Average snowfall in September: 0"

The month with the highest snowfall is January (5.59").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Lyonsville, WV

Average snowfall days in September - Lyonsville, WV
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Lyonsville, WV

Average daylight in September / Average sunshine in September - Lyonsville, WV
  • 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 36min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in September
Lyonsville, WV

Average sunshine days in September - Lyonsville, WV
  • Average sunshine days in September: 12.3 days

The month with the most sunshine days is October (16.5 days).
The month with the least sunshine days is January (8.4 days).

Average UV index in September
Lyonsville, WV

Average UV index in September - Lyonsville, WV
  • Average UV index in September: 4

The months with the highest UV index are 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
Lyonsville, WV

Average cloud cover in September - Lyonsville, WV
  • Average cloud cover in September: 40

The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in September
Lyonsville, WV

Average visibility in September - Lyonsville, WV
  • Average visibility in September: 5mi

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

Lyonsville, West Virginia, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location