December weather forecast and climate
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

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

Temperature

In December, the average high-temperature marginally drops, from a cool 53.2°F (11.8°C) in November, to a chilly 44.8°F (7.1°C). The average low-temperature, in December, is 33.4°F (0.8°C).

Humidity

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

Rainfall

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

Snowfall

Months with snowfall in Baltimore are January through March, November and December. In Baltimore, snow falls for 2.2 days, with typically accumulated 0.63" (16mm) of snow. Throughout the year, in Baltimore, there are 12.8 snowfall days, and 6.06" (154mm) of snow is accumulated.

Ocean temperature

In Baltimore, 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

The month with the shortest days is December, with an average of 9.5h of daylight.

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 value of 2, and less, symbolizes a low threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Baltimore?

The average high-temperature, in December, in Baltimore, Maryland, is 44.8°F (7.1°C), while the average low-temperature is 33.4°F (0.8°C).

What is the average humidity in December in Baltimore?

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

How much does it rain in Baltimore in December?

In December, the rain falls for 10.1 days. Throughout December, 2.36" (60mm) of precipitation is accumulated.

How much does it snow in Baltimore in December?

In Baltimore, during December, snow falls for 2.2 days and regularly aggregates up to 0.63" (16mm) of snow.

How cold is the water in December in Baltimore?

In Baltimore, the average seawater temperature in December is 50.7°F (10.4°C). 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.

What is the month with the shortest days in Baltimore?

December has the shortest days of the year, with an average of 9.5h of daylight.

How many hours of daylight does Baltimore have in December?

In December, the average length of the day in Baltimore is 9.5h.

How long on average sun shines in December in Baltimore?

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

What are the months 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 in Baltimore.

How high is the UV index in December in Baltimore?

In Baltimore, Maryland, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation.

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"

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

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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%).
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").
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).
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: 9.5h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 5.2h

The month with the most sunshine is July (Average sunshine: 10.9h).
The month with the least sunshine is February (Average sunshine: 5h).

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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

Months with the highest UV index are May, June, July and August (UV index 6).
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

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

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