December weather forecast
McMechen, WV

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Weather in December

The first month of the winter, December, is still a cold month in McMechen, West Virginia, with temperature in the range of an average high of 40.5°F (4.7°C) and an average low of 28.8°F (-1.8°C).

Temperature

Stepping into December, McMechen observes a temperature decline, with the average high falling from November's frosty 49.6°F (9.8°C) to an icy 40.5°F (4.7°C). During December, an average low-temperature of 28.8°F (-1.8°C) is observed.

Humidity

The average relative humidity in December is 83%.

Rainfall

In McMechen, during December, the rain falls for 13.1 days and regularly aggregates up to 3.11" (79mm) of precipitation. Throughout the year, there are 186.2 rainfall days, and 35.16" (893mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In McMechen, in December, snow falls for 10.4 days, with typically accumulated 3.19" (81mm) of snow. In McMechen, during the entire year, snow falls for 50.6 days and aggregates up to 19.13" (486mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:26 am and sunset at 4:58 pm. On the last day of December, sunrise is at 7:44 am and sunset at 5:07 pm EST.

Sunshine

In McMechen, the average sunshine in December is 3.6h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 1 during December leads to these instructions:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold in McMechen during December?

The average high-temperature and low-temperature during December are 40.5°F (4.7°C) and 28.8°F (-1.8°C) respectively. The average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is estimated at 89.6°F (32°C).

What is the average humidity in December?

In McMechen, the average relative humidity in December is 83%.

How much does it rain in McMechen in December?

In McMechen, during December, the rain falls for 13.1 days and regularly aggregates up to 3.11" (79mm) of precipitation.

How many days does it snow in December?

In McMechen, in December, snow falls for 10.4 days, with typically accumulated 3.19" (81mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year in McMechen, with an average of 9h and 24min of daylight.

What is the average length of the day in December?

The average day length in December in McMechen is 9h and 23min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:26 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 5:07 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 3.6h.

What is the month with the lowest UV index?

December is the month with the lowest UV index, with an average maximum UV index of 1.

What is the UV index intensity in December in McMechen?

In December, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
McMechen, WV

Average temperature in December - McMechen, WV
  • Average high temperature in December: 40.5°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.5°F).

  • Average low temperature in December: 28.8°F

The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).

Average pressure in December
McMechen, WV

Average pressure in December - McMechen, WV
  • Average pressure in December: 30.12"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 December
McMechen, WV

Average wind speed in December - McMechen, WV
  • Average wind speed in December: 6.8mph

The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).

Average humidity in December
McMechen, WV

Average humidity in December - McMechen, WV
  • Average humidity in December: 83%

The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are April and August (77%).

Average rainfall in December
McMechen, WV

Average rainfall in December - McMechen, WV
  • Average rainfall in December: 3.11"

The wettest month (with the highest rainfall) is April (3.7").
The driest month (with the least rainfall) is September (2.13").

Average rainfall days in December
McMechen, WV

Average rainfall days in December - McMechen, WV
  • Average rainfall days in December: 13.1 days

The month with the highest number of rainy days is May (20.8 days).
The month with the least rainy days is November (11.3 days).

Average snowfall in December
McMechen, WV

Average snowfall in December - McMechen, WV
  • Average snowfall in December: 3.19"

The month with the highest snowfall is January (5.31").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
McMechen, WV

Average snowfall days in December - McMechen, WV
  • Average snowfall days in December: 10.4 days

The month with the highest number of snowfall days is January (15.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
McMechen, WV

Average daylight in December / Average sunshine in December - McMechen, WV
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 3h and 4min

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in December
McMechen, WV

Average sunshine days in December - McMechen, WV
  • Average sunshine days in December: 10.5 days

The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is May (8.4 days).

Average UV index in December
McMechen, WV

Average UV index in December - McMechen, WV
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
McMechen, WV

Average cloud cover in December - McMechen, WV
  • Average cloud cover in December: 63

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in December
McMechen, WV

Average visibility in December - McMechen, WV
  • Average visibility in December: 5mi

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

McMechen, West Virginia, USA

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