December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average snowfall in December
Average snowfall days in December
Average sea temperature in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

A golden evening appearance of tall buildings in Baltimore, Maryland

Weather in December

December in Baltimore represents the arrival of Winter and the end of the year. The city gets decked up with holiday decorations and can experience some snowfall towards the late December period. The temperatures are colder with an average high of 44.8°F (7.1°C), pointing towards the upcoming depth of Winter. Despite the chilly weather, December carries a festive cheer as it concludes the weather cycle of the year.

Temperature

December's arrival comes with a mild decrease in the average high-temperature, moving subtly from a cool 53.2°F (11.8°C) in November to a frosty 44.8°F (7.1°C). Baltimore's average low-temperature in the month of December is recorded at a cold 33.4°F (0.8°C).

Humidity

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

Rainfall

In Baltimore, during December, the rain falls for 10.1 days and regularly aggregates up to 2.36" (60mm) of precipitation. 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 December, it is snowing for 2.2 days. Throughout December, 0.63" (16mm) of snow is accumulated. 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, the average seawater temperature in December is 50.7°F (10.4°C).
Note: Entering waters of 50.7°F (10.4°C) is life-endangering. A mere moment in 55.4°F (13°C) waters feels piercing cold, and below 50°F (10°C) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience.

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 7:07 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:53 pm EST.

Sunshine

In December, the average sunshine 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. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: In December, a daily UV index of 2 turns into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Experience reduced UV exposure by about half when donning a wide-brim hat. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.

Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average December temperature?

The high-temperature during December is 44.8°F (7.1°C) and the low-temperature is 33.4°F (0.8°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), 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?

The average relative humidity in December is 75%.

How many days does it rain in December?

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

How many days does it snow in December?

In December, it is snowing for 2.2 days. Throughout December, 0.63" (16mm) of snow is accumulated.

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 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?

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

How many hours of daylight does Baltimore have in December?

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

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:07 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:53 pm EST.

How many hours of sunshine does Baltimore have in December?

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

What is the month with the lowest UV index?

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

What is the UV index intensity in December?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

53.2°F 11.8°C

44.8°F 7.1°C

38.5°F 3.6°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8.9mph 14.3km/h

9.1mph 14.6km/h

9.8mph 15.8km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

0.3

2.2

4.2

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

19.9

18.2

18.3

Average UV index

Average cloud cover

Average visibility

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).

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).

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).

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%).

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").

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).

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").

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).

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

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).

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).

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).

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).

December weather forecast
Baltimore, MD

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