December weather forecast
Annapolis, MD

The Chesapeake Bay at dusk, in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome
The Chesapeake Bay at dusk, in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome

Weather in December

The first month of the winter, December, is still a chilly month in Annapolis, Maryland, with an average temperature ranging between min 36.5°F (2.5°C) and max 46°F (7.8°C).

Temperature

In Annapolis, the average high-temperature in December marginally drops from a cool 54.5°F (12.5°C) in November to a frosty 46°F (7.8°C). In Annapolis, in December, the average low-temperature is 36.5°F (2.5°C).

Humidity

The average relative humidity in December is 75%.

Rainfall

In Annapolis, during December, the rain falls for 7.4 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, in Annapolis, there are 120.4 rainfall days, and 10.47" (266mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall. In Annapolis, during December, snow falls for 1.5 days and regularly aggregates up to 0.12" (3mm) of snow. In Annapolis, during the entire year, snow falls for 8.3 days and aggregates up to 1.22" (31mm) of snow.

Ocean temperature

In Annapolis, the average seawater temperature in December is 51.6°F (10.9°C).
Note: Swimming in 51.6°F (10.9°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 9h and 29min of daylight.
On the first day of the month, sunrise is at 7:05 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:53 pm EST.

Sunshine

The average sunshine in December in Annapolis, Maryland, is 5.2h.

UV index

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Annapolis. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. 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 Annapolis?

The average relative humidity in December in Annapolis is 75%.

How much does it rain in Annapolis in December?

In Annapolis, Maryland, during December, the rain falls for 7.4 days and regularly aggregates up to 0.67" (17mm) of precipitation.

How much does it snow in Annapolis in December?

In December, in Annapolis, it is snowing for 1.5 days. Throughout December, 0.12" (3mm) of snow is accumulated.

How cold is the water in December in Annapolis?

In Annapolis, in December, the average water temperature is 51.6°F (10.9°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 Annapolis?

With an average of 9h and 29min of daylight, December has the shortest days of the year in Annapolis.

How many hours of daylight does Annapolis have in December?

In December, the average day length in Annapolis is 9h and 29min.

When are sunrise and sunset in December in Annapolis?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:53 pm EST.

How many hours of sunshine does Annapolis have in December?

In December, the average sunshine duration is 5.2h.

What are the months with the lowest UV index in Annapolis?

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

What is the UV index reading in December in Annapolis?

In Annapolis, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
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
Annapolis, MD

Average temperature in December - Annapolis, MD
  • Average high temperature in December: 46°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (40.3°F).

  • Average low temperature in December: 36.5°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).

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Average pressure in December
Annapolis, MD

Average pressure in December - Annapolis, MD
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in December
Annapolis, MD

Average wind speed in December - Annapolis, MD
  • Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

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Average humidity in December
Annapolis, MD

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

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March, April and November (72%).

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Average rainfall in December
Annapolis, MD

Average rainfall in December - Annapolis, MD
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is August (1.69").
The driest month (with the least rainfall) is January (0.47").

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Average rainfall days in December
Annapolis, MD

Average rainfall days in December - Annapolis, MD
  • Average rainfall days in December: 7.4 days

The months with the highest number of rainy days are July and August (14.3 days).
The month with the least rainy days is November (5.3 days).

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Average snowfall in December
Annapolis, MD

Average snowfall in December - Annapolis, MD
  • Average snowfall in December: 0.12"

The month with the highest snowfall is January (0.67").
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
Annapolis, MD

Average snowfall days in December - Annapolis, MD
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is February (2.5 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
Annapolis, MD

Average sea temperature in December - Annapolis, MD
  • Average sea temperature in December: 51.7°F

The best month for swimming (with the highest average sea temperature) is August (77.8°F).
The coldest month (with the lowest average sea temperature) is February (45.1°F).

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

Average daylight in December / Average sunshine in December - Annapolis, MD
  • Average daylight in December: 9h and 29min

The month with the longest days is June (Average daylight: 14h and 52min).
The month with the shortest days is December (Average daylight: 9h and 29min).

  • Average sunshine in December: 5h and 12min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

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Average sunshine days in December
Annapolis, MD

Average sunshine days in December - Annapolis, MD
  • Average sunshine days in December: 21.5 days

The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is August (13.8 days).

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Average UV index in December
Annapolis, MD

Average UV index in December - Annapolis, 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 and December (UV index 2).

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Average cloud cover in December
Annapolis, MD

Average cloud cover in December - Annapolis, MD
  • Average cloud cover in December: 44

The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in December
Annapolis, MD

Average visibility in December - Annapolis, 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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