Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in McMechen during December?
What is the average humidity in December?
How much does it rain in McMechen in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December in McMechen?
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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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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