Baltimore
Maryland, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Baltimore, MD

A golden evening appearance of tall buildings in Baltimore, Maryland, with the clear sky
A golden evening appearance of tall buildings in Baltimore, Maryland, with the clear sky
Baltimore is cold in December, as the temperature decreases sharply to the low range of 32.7°F (0.4°C) and 46°F (7.8°C).
Snowfall only occurs for approximately one and a half days with a low 3" (76.2mm) accumulation.
Rain falls for an average of ten days to collect 3.4" (86.4mm) in the rain gauge, making most days cold and wet.
The sea temperature drops to 42.8°F (6°C), bringing most sea activities to a stop. Basking in the four and a half hours of sunshine, however, remains in place.
Crowds thin out considerably, leaving sufficient room to tour Baltimore without the hustle and bustle of the peak tourist period.

What is the temperature in December in Baltimore?

The average high-temperature, in December, in Baltimore, Maryland, is 46°F (7.8°C), while the average low-temperature is 32.7°F (0.4°C).

What is the average humidity in December in Baltimore?

The average relative humidity in December in Baltimore is 65.5%.

How many days does it rain in December in Baltimore?

In Baltimore, Maryland, in December, it is raining for 9.9 days, with typically 3.4" (86.6mm) of accumulated precipitation.

How many days does it snow in December in Baltimore?

In Baltimore, in December, snow falls for 1.7 days, with typically accumulated 3" (76.2mm) of snow.

What is the water temperature in December in Baltimore?

In Baltimore, in December, the average water temperature is 50.7°F (10.4°C). Swimming in 50.7°F (10.4°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the month with the shortest days in Baltimore?

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

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

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

What is the month with the least sunshine in Baltimore?

With an average of 4.7h of sunshine, December has the least sunshine of the year in Baltimore, Maryland.

How long on average sun shines in December in Baltimore?

The average sunshine in December is 4.7h.

When is the lowest UV index in Baltimore?

Months with the lowest UV index in Baltimore, Maryland, are January, November and December, with an average maximum UV index of 2.

What is the UV index reading in December in Baltimore?

In Baltimore, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to the UV radiation.
Average temperature in December - Baltimore, MD
  • Average high temperature in December: 46.1°F

The warmest month (with the highest average high temperature) is July (89°F).
The month with the lowest average high temperature is January (42.4°F).

  • Average low temperature in December: 32.8°F

The month with the highest average low temperature is July (72.5°F).
The coldest month (with the lowest average low temperature) is January (29.2°F).

Average humidity in December - Baltimore, MD
  • Average humidity in December: 65.5%

The month with the highest relative humidity is September (71.3%).
The month with the lowest relative humidity is April (58.9%).

Average rainfall in December - Baltimore, MD
  • Average rainfall in December: 3.4"

The wettest month (with the highest rainfall) is July (4.6").
The driest month (with the lowest rainfall) is February (2.6").

Average rainfall days in December - Baltimore, MD
  • Average rainfall days in December: 9.9 days

The month with the highest number of rainy days is May (11.2 days).
The month with the lowest number of rainy days is October (8.3 days).

Average snowfall in December - Baltimore, MD
  • Average snowfall in December: 3"

The month with the highest snowfall is February (8").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December - Baltimore, MD
  • Average snowfall days in December: 1.7 days

The month with the highest number of snowfall days is January (3.5 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

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).

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 shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 4.7h

The month with most sunshine is July (Average sunshine: 9.4h).
The month with least sunshine is December (Average sunshine: 4.7h).

Average UV index in December - Baltimore, MD
  • Average UV index in December: 2

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).