December weather forecast
Folsom, WV

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Weather in December

December, the first month of the winter in Folsom, is also an icy month, with an average temperature fluctuating between 41.5°F (5.3°C) and 29.3°F (-1.5°C).

Temperature

The start of December signals a decrease in the average high-temperature, transitioning from a cool 50.5°F (10.3°C) in November to a cold 41.5°F (5.3°C). In the month of December, the nighttime temperature dips to a steady average of 29.3°F (-1.5°C).

Humidity

In Folsom, the average relative humidity in December is 82%.

Rainfall

In Folsom, in December, during 13.1 rainfall days, 3.35" (85mm) of precipitation is typically accumulated. Throughout the year, there are 188.6 rainfall days, and 39.17" (995mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Folsom, in December, snow falls for 10.7 days, with typically accumulated 4.29" (109mm) of snow. Throughout the year, there are 52.1 snowfall days, and 24.21" (615mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:23 am and sunset at 4:58 pm. On the last day of December, sunrise is at 7:42 am and sunset at 5:08 pm EST.

Sunshine

The average sunshine in December is 3.5h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Updated: Jun 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?

Folsom in December has an average high-temperature of 41.5°F (5.3°C) and an average low-temperature of 29.3°F (-1.5°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in August is computed to be 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 82%.

How much does it rain in December?

In December, the rain falls for 13.1 days. Throughout December, 3.35" (85mm) of precipitation is accumulated.

How many days does it snow in December?

In December, it is snowing for 10.7 days. Throughout December, 4.29" (109mm) of snow is accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

How many hours of daylight does Folsom have in December?

The average day length in December is 9h and 26min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:23 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:08 pm EST.

How many hours of sunshine does Folsom have in December?

In December, the average sunshine duration is 3.5h.

What are the months with the lowest UV index?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in December?

In Folsom, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe 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
Folsom, WV

Average temperature in December - Folsom, WV
  • Average high temperature in December: 41.5°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in December: 29.3°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure in December
Folsom, WV

Average pressure in December - Folsom, 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 (29.96"Hg).

Average wind speed in December
Folsom, WV

Average wind speed in December - Folsom, WV
  • Average wind speed in December: 6.3mph

The windiest months (with the highest average wind speed) are January and February (7mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

Average humidity in December
Folsom, WV

Average humidity in December - Folsom, WV
  • Average humidity in December: 82%

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

Average rainfall in December
Folsom, WV

Average rainfall in December - Folsom, WV
  • Average rainfall in December: 3.35"

The wettest month (with the highest rainfall) is May (4.53").
The driest month (with the least rainfall) is November (2.24").

Average rainfall days in December
Folsom, WV

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

The month with the highest number of rainy days is May (21.3 days).
The month with the least rainy days is January (10.8 days).

Average snowfall in December
Folsom, WV

Average snowfall in December - Folsom, WV
  • Average snowfall in December: 4.29"

The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Folsom, WV

Average snowfall days in December - Folsom, WV
  • Average snowfall days in December: 10.7 days

The month with the highest number of snowfall days is January (15 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Folsom, WV
  • Average daylight in December: 9h 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 24min).

  • Average sunshine in December: 3h and 3min

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).

Average sunshine days in December
Folsom, WV

Average sunshine days in December - Folsom, WV
  • Average sunshine days in December: 10.8 days

The month with the most sunshine days is November (15.4 days).
The month with the least sunshine days is May (7.8 days).

Average UV index in December
Folsom, WV

Average UV index in December - Folsom, WV
  • Average UV index in December: 2

The months with the highest UV index are May and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Folsom, WV

Average cloud cover in December - Folsom, WV
  • Average cloud cover in December: 64

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 37).

Average visibility in December
Folsom, WV

Average visibility in December - Folsom, 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).

Folsom, West Virginia, USA

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