December weather forecastBaltimore, MD
December
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 30min
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 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).
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).
