December weather forecast
Selby-on-the-Bay, MD

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Weather in December

Finally arriving at December, the winter starts to set in deeply at Selby-on-the-Bay. This month witnesses the reappearance of snowfall, albeit low, at an average of 0.12" (3mm), and temperatures dropping to an average high of 46°F (7.8°C). The daylight hours are shorter, and the town sports a festive spirit with Christmas and New Year's Eve celebrations. Despite the cooler temperatures, the city's charms do not dip, offering residents and visitors an array of indoor activities and holiday festivities. With the coming of the new year, the weather cycle of Selby-on-the-Bay comes full circle.

Temperature

December ushers in a minor alteration in Selby-on-the-Bay's climate, with the average high-temperature moving from November's cool 54.5°F (12.5°C) to a chilly 46°F (7.8°C). In the month of December, the nighttime temperature dips to a steady average of 36.5°F (2.5°C).

Humidity

In Selby-on-the-Bay, the average relative humidity in December is 75%.

Rainfall

In Selby-on-the-Bay, in December, it is raining for 7.4 days, with typically 0.67" (17mm) of accumulated precipitation. 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 Selby-on-the-Bay, in December, snow falls for 1.5 days, with typically accumulated 0.12" (3mm) of snow. Throughout the year, there are 8.3 snowfall days, and 1.22" (31mm) of snow is accumulated.

Ocean temperature

In December, the average ocean temperature is 52°F (11.1°C).
Note: Diving into 52°F (11.1°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of December, sunrise is at 7:06 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:54 pm EST.

Sunshine

The average sunshine in December is 5.2h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Updated: Jun 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in December?

The high-temperature, in December, in Selby-on-the-Bay, records 46°F (7.8°C), while the low-temperature is 36.5°F (2.5°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 89.6°F (32°C).

What is the average humidity in December?

The average relative humidity in December is 75%.

How much does it rain in December?

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

How many days does it snow in December?

In Selby-on-the-Bay, in December, snow falls for 1.5 days, with typically accumulated 0.12" (3mm) of snow.

How cold is the water in December in Selby-on-the-Bay?

In Selby-on-the-Bay, in December, the average water temperature is 52°F (11.1°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 Selby-on-the-Bay?

With an average of 9h and 30min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

The average day length in December is 9h and 29min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:06 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:54 pm EST.

How long on average sun shines in December?

In Selby-on-the-Bay, the average sunshine duration in December is 5.2h.

What is the month with the lowest UV index?

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 intensity in December?

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 Sun's UV rays.
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
Selby-on-the-Bay, MD

Average temperature in December - Selby-on-the-Bay, 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).

Average pressure in December
Selby-on-the-Bay, MD

Average pressure in December - Selby-on-the-Bay, 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).

Average wind speed in December
Selby-on-the-Bay, MD

Average wind speed in December - Selby-on-the-Bay, 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).

Average humidity in December
Selby-on-the-Bay, MD

Average humidity in December - Selby-on-the-Bay, 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%).

Average rainfall in December
Selby-on-the-Bay, MD

Average rainfall in December - Selby-on-the-Bay, 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").

Average rainfall days in December
Selby-on-the-Bay, MD

Average rainfall days in December - Selby-on-the-Bay, 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).

Average snowfall in December
Selby-on-the-Bay, MD

Average snowfall in December - Selby-on-the-Bay, 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").

Average snowfall days in December
Selby-on-the-Bay, MD

Average snowfall days in December - Selby-on-the-Bay, 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).

Average sea temperature in December
Selby-on-the-Bay, MD

Average sea temperature in December - Selby-on-the-Bay, MD
  • Average sea temperature in December: 52°F

The best month for swimming (with the highest average sea temperature) is August (78°F).
The coldest month (with the lowest average sea temperature) is February (45.9°F).

Average daylight in December /
Average sunshine in December
Selby-on-the-Bay, MD

Average daylight in December / Average sunshine in December - Selby-on-the-Bay, 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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in December
Selby-on-the-Bay, MD

Average sunshine days in December - Selby-on-the-Bay, 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).

Average UV index in December
Selby-on-the-Bay, MD

Average UV index in December - Selby-on-the-Bay, 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).

Average cloud cover in December
Selby-on-the-Bay, MD

Average cloud cover in December - Selby-on-the-Bay, 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).

Average visibility in December
Selby-on-the-Bay, MD

Average visibility in December - Selby-on-the-Bay, 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).

Selby-on-the-Bay, Maryland, USA

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