December weather forecast
Oak Forest, MD

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Weather in December

The first month of the winter, December, is also a frosty month in Oak Forest, Maryland, with an average temperature fluctuating between 32.9°F (0.5°C) and 44.1°F (6.7°C).

Temperature

The average high-temperature shows a slight dip in December, from November's fresh 53.1°F (11.7°C) to a chilly 44.1°F (6.7°C). An average nighttime temperature of 32.9°F (0.5°C) is observed during December.

Humidity

In Oak Forest, the average relative humidity in December is 76%.

Rainfall

In Oak Forest, in December, during 11.8 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. In Oak Forest, during the entire year, the rain falls for 165.5 days and collects up to 31.65" (804mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Oak Forest, in December, snow falls for 2.9 days, with typically accumulated 1.22" (31mm) of snow. Throughout the year, there are 16.6 snowfall days, and 7.8" (198mm) of snow is accumulated.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:08 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:54 pm EST.

Sunshine

In Oak Forest, the average sunshine in December is 5.2h.

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 of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 2 during December translates into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Updated: Jul 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

The average high-temperature and low-temperature during December are 44.1°F (6.7°C) and 32.9°F (0.5°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 89.6°F (32°C).

What is the average humidity in December?

In Oak Forest, the average relative humidity in December is 76%.

How much does it rain in December?

In Oak Forest, Maryland, in December, during 11.8 rainfall days, 2.6" (66mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Oak Forest, in December, during 2.9 snowfall days, 1.22" (31mm) of snow is typically accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

What is the average length of the day in December?

The average day length in December is 9h and 28min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:08 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:54 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 5.2h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to the Sun's UV radiation.
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
Oak Forest, MD

Average temperature in December - Oak Forest, MD
  • Average high temperature in December: 44.1°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.1°F).

  • Average low temperature in December: 32.9°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

Average pressure in December
Oak Forest, MD

Average pressure in December - Oak Forest, MD
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Oak Forest, MD

Average wind speed in December - Oak Forest, MD
  • Average wind speed in December: 8mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in December
Oak Forest, MD

Average humidity in December - Oak Forest, MD
  • Average humidity in December: 76%

The months with the highest relative humidity are May and October (77%).
The month with the lowest relative humidity is July (71%).

Average rainfall in December
Oak Forest, MD

Average rainfall in December - Oak Forest, MD
  • Average rainfall in December: 2.6"

The wettest month (with the highest rainfall) is August (3.74").
The driest month (with the least rainfall) is January (2.05").

Average rainfall days in December
Oak Forest, MD

Average rainfall days in December - Oak Forest, MD
  • Average rainfall days in December: 11.8 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (9.7 days).

Average snowfall in December
Oak Forest, MD

Average snowfall in December - Oak Forest, MD
  • Average snowfall in December: 1.22"

The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Oak Forest, MD

Average snowfall days in December - Oak Forest, MD
  • Average snowfall days in December: 2.9 days

The month with the highest number of snowfall days is January (4.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Oak Forest, MD

Average daylight in December / Average sunshine in December - Oak Forest, MD
  • Average daylight in December: 9h and 3min

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 30min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in December
Oak Forest, MD

Average sunshine days in December - Oak Forest, MD
  • Average sunshine days in December: 16.2 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.4 days).

Average UV index in December
Oak Forest, MD

Average UV index in December - Oak Forest, MD
  • Average UV index in December: 2

The months with the highest UV index are May, 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 December
Oak Forest, MD

Average cloud cover in December - Oak Forest, MD
  • Average cloud cover in December: 44

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in December
Oak Forest, MD

Average visibility in December - Oak Forest, MD
  • Average visibility in December: 6mi

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

Oak Forest, Maryland, USA

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