December weather forecast
Baltimore, MD

A golden evening appearance of tall buildings in Baltimore, Maryland
A golden evening appearance of tall buildings in Baltimore, Maryland

Weather in December

December, the first month of the winter in Baltimore, is still a chilly month, with an average temperature fluctuating between 33.4°F (0.8°C) and 44.8°F (7.1°C).

Temperature

In Baltimore, the average high-temperature in December slightly decreases from a fresh 53.2°F (11.8°C) in November to a frosty 44.8°F (7.1°C). The average low-temperature, is 33.4°F (0.8°C).

Humidity

In Baltimore, the average relative humidity in December is 75%.

Rainfall

In December, in Baltimore, the rain falls for 10.1 days. Throughout December, 2.36" (60mm) of precipitation is accumulated. Throughout the year, there are 158.5 rainfall days, and 30.75" (781mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall in Baltimore. In Baltimore, snow falls for 2.2 days, with typically accumulated 0.63" (16mm) of snow. In Baltimore, during the entire year, snow falls for 12.8 days and aggregates up to 6.06" (154mm) of snow.

Ocean temperature

In Baltimore, Maryland, the average seawater temperature in December is 50.7°F (10.4°C).
Note: Swimming in 50.7°F (10.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

With an average of 9h and 28min of daylight, December has the shortest days of the year in Baltimore, Maryland.
On the first day of December, sunrise is at 7:07 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:53 pm EST.

Sunshine

In Baltimore, the average sunshine in December is 5.2h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Baltimore. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Baltimore?

The average relative humidity in December is 75%.

How many days does it rain in December in Baltimore?

In Baltimore, Maryland, during December, the rain falls for 10.1 days and regularly aggregates up to 2.36" (60mm) of precipitation.

How many days does it snow in December in Baltimore?

In Baltimore, Maryland, in December, during 2.2 snowfall days, 0.63" (16mm) of snow is typically accumulated.

What is the water temperature in December in Baltimore?

In Baltimore, the average seawater temperature in December is 50.7°F (10.4°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

What is the month with the shortest days in Baltimore?

The month with the shortest days is December, with an average of 9h and 28min of daylight.

What is the average length of the day in December in Baltimore?

In Baltimore, the average day length in December is 9h and 28min.

When is the sunrise / sunset in December in Baltimore?

On the first day of December, sunrise is at 7:07 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:53 pm EST.

How long on average sun shines in December in Baltimore?

The average sunshine duration in December in Baltimore is 5.2h.

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

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 intensity in December in Baltimore?

The average daily maximum UV index in December in Baltimore is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability 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
Baltimore, MD

Average temperature in December - Baltimore, MD
  • Average high temperature in December: 44.8°F

The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (38.5°F).

  • Average low temperature in December: 33.4°F

The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).

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Average pressure in December
Baltimore, MD

Average pressure in December - Baltimore, 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).

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Average wind speed in December
Baltimore, MD

Average wind speed in December - Baltimore, MD
  • Average wind speed in December: 8.4mph

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity in December
Baltimore, MD

Average humidity in December - Baltimore, MD
  • Average humidity in December: 75%

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

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Average rainfall in December
Baltimore, MD

Average rainfall in December - Baltimore, MD
  • Average rainfall in December: 2.36"

The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (1.85").

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Average rainfall days in December
Baltimore, MD

Average rainfall days in December - Baltimore, MD
  • Average rainfall days in December: 10.1 days

The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is November (8.4 days).

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Average snowfall in December
Baltimore, MD

Average snowfall in December - Baltimore, MD
  • Average snowfall in December: 0.63"

The month with the highest snowfall is January (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Baltimore, MD

Average snowfall days in December - Baltimore, MD
  • Average snowfall days in December: 2.2 days

The month with the highest number of snowfall days is January (4.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in December
Baltimore, MD

Average sea temperature in December - Baltimore, MD
  • Average sea temperature in December: 50.7°F

The best month for swimming (with the highest average sea temperature) is August (77.5°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).

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Average daylight in December /
Average sunshine in December
Baltimore, MD

Average daylight in December / Average sunshine in December - Baltimore, MD
  • Average daylight in December: 9h and 28min

The month with the longest days is June (Average daylight: 14h and 53min).
The month with the shortest days is December (Average daylight: 9h and 28min).

  • Average sunshine in December: 5h and 12min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

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Average sunshine days in December
Baltimore, MD

Average sunshine days in December - Baltimore, MD
  • Average sunshine days in December: 18.2 days

The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (10.3 days).

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Average UV index in December
Baltimore, MD

Average UV index in December - Baltimore, 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).

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Average cloud cover in December
Baltimore, MD

Average cloud cover in December - Baltimore, 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).

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Average visibility in December
Baltimore, MD

Average visibility in December - Baltimore, 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).

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