December weather forecast
Forestville, MD

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Weather in December

December, the first month of the winter in Forestville, is still a chilly month, with temperature in the range of an average low of 34.7°F (1.5°C) and an average high of 45.7°F (7.6°C).

Temperature

December reveals a small adjustment in temperature, transitioning from an average high of a fresh 54.5°F (12.5°C) in November to a chilly 45.7°F (7.6°C). An average low-temperature of 34.7°F (1.5°C) is expected during December.

Humidity

In December, the average relative humidity is 76%.

Rainfall

In Forestville, during December, the rain falls for 11.1 days and regularly aggregates up to 2.68" (68mm) of precipitation. Throughout the year, there are 164.8 rainfall days, and 32.87" (835mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Forestville are January through April, November and December. In Forestville, during December, snow falls for 2.5 days and regularly aggregates up to 1.06" (27mm) of snow. In Forestville, during the entire year, snow falls for 15.1 days and aggregates up to 8.5" (216mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:07 am and sunset at 4:46 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:55 pm EST.

Sunshine

In December, the average sunshine is 5.2h.

UV index

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 2 during December leads to these advisories:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

Frequently asked questions

What are the temperatures in December?

The high-temperature, in December, in Forestville, is 45.7°F (7.6°C), while the low-temperature averages to 34.7°F (1.5°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 93.2°F (34°C).

What is the average humidity in December?

In December, the average relative humidity is 76%.

How many days does it rain in December?

In Forestville, during December, the rain falls for 11.1 days and regularly aggregates up to 2.68" (68mm) of precipitation.

How many days does it snow in December?

In Forestville, in December, snow falls for 2.5 days, with typically accumulated 1.06" (27mm) of snow.

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.

How many hours of daylight does Forestville have in December?

The average day length in December is 9h and 30min.

When are sunrise and sunset in December in Forestville?

In December, on the first day of the month, sunrise is at 7:07 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:55 pm EST.

How long on average sun shines in December in Forestville?

In Forestville, the average sunshine duration in December is 5.2h.

What is the month with the lowest UV index in Forestville?

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

How high is the UV index in December?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to 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
Forestville, MD

Average temperature in December - Forestville, MD
  • Average high temperature in December: 45.7°F

The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in December: 34.7°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).

Average pressure in December
Forestville, MD

Average pressure in December - Forestville, 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
Forestville, MD

Average wind speed in December - Forestville, MD
  • Average wind speed in December: 7.6mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.4mph).

Average humidity in December
Forestville, MD

Average humidity in December - Forestville, MD
  • Average humidity in December: 76%

The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are January, March and April (72%).

Average rainfall in December
Forestville, MD

Average rainfall in December - Forestville, MD
  • Average rainfall in December: 2.68"

The wettest month (with the highest rainfall) is August (3.94").
The driest month (with the least rainfall) is January (2.05").

Average rainfall days in December
Forestville, MD

Average rainfall days in December - Forestville, MD
  • Average rainfall days in December: 11.1 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in December
Forestville, MD

Average snowfall in December - Forestville, MD
  • Average snowfall in December: 1.06"

The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Forestville, MD

Average snowfall days in December - Forestville, MD
  • Average snowfall days in December: 2.5 days

The month with the highest number of snowfall days is January (4.6 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
Forestville, MD

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

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 30min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

Average sunshine days in December
Forestville, MD

Average sunshine days in December - Forestville, MD
  • Average sunshine days in December: 16.7 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.8 days).

Average UV index in December
Forestville, MD

Average UV index in December - Forestville, 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, November and December (UV index 2).

Average cloud cover in December
Forestville, MD

Average cloud cover in December - Forestville, MD
  • Average cloud cover in December: 44

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in December
Forestville, MD

Average visibility in December - Forestville, 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).

Forestville, Maryland, USA

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