December weather forecast and climate
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

December, the first month of the winter, in Annapolis, is still a chilly month, with temperature in the range of an average high of 46°F (7.8°C) and an average low of 36.5°F (2.5°C).

Temperature

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

Humidity

In Annapolis, the average relative humidity is 75%.

Rainfall

In Annapolis, during 7.4 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, 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. In Annapolis, in December, during 1.5 snowfall days, 0.12" (3mm) of snow is typically accumulated. In Annapolis, during the entire year, snow falls for 8.3 days, and aggregates up to 1.22" (31mm) of snow.

Ocean temperature

In December, the average ocean temperature is 51.6°F (10.9°C).
Note: Swimming in 51.6°F (10.9°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.

Daylight

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

Sunshine

The average sunshine in Annapolis is 5.2h.

UV index

Months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the temperature in December in Annapolis?

In December, in Annapolis, Maryland, the average high-temperature is 46°F (7.8°C), and the average low-temperature is 36.5°F (2.5°C).

What is the average humidity in December in Annapolis?

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

How many days does it rain in December in Annapolis?

In December, in Annapolis, the rain falls for 7.4 days. Throughout December, 0.67" (17mm) of precipitation is accumulated.

How much does it snow in Annapolis in December?

In Annapolis, Maryland, in December, during 1.5 snowfall days, 0.12" (3mm) of snow is typically accumulated.

What is the ocean temperature in December in Annapolis?

In December, the average ocean temperature in Annapolis, Maryland, 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?

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

How many hours of daylight does Annapolis have in December?

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

How long on average sun shines in December in Annapolis?

The average sunshine in December is 5.2h.

When is the lowest UV index in Annapolis?

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

What is the UV index intensity in December in Annapolis?

The average daily maximum UV index in December in Annapolis, Maryland, is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.

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).

[Resources]

Average pressure in December
Annapolis, MD

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

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

[Resources]

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).

[Resources]

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%).
Months with the lowest relative humidity are January, March, April and November (72%).

[Resources]

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").

[Resources]

Average rainfall days in December
Annapolis, MD

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

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).

[Resources]

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").
Months with the least snowfall are April, May, June, July, August, September and October (0").

[Resources]

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).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

[Resources]

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).

[Resources]

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

Average daylight in December / Average sunshine in December - Annapolis, 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: 10.8h).
The month with the least sunshine is February (Average sunshine: 5h).

[Resources]

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).

[Resources]

Average UV index in December
Annapolis, MD

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

[Resources]

Average cloud cover in December
Annapolis, MD

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

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).

[Resources]

Average visibility in December
Annapolis, MD

Average visibility in December - Annapolis, 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).

[Resources]