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

Selby-on-the-Bay's December weather features a light decline in high-temperatures, reducing from a cool 54.5°F (12.5°C) in November to a chilly 46°F (7.8°C). In Selby-on-the-Bay, the December nights cool down to an average low 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. In Selby-on-the-Bay, during the entire year, the rain falls for 120.4 days and collects up to 10.47" (266mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In December, it is snowing for 1.5 days. Throughout December, 0.12" (3mm) of snow is accumulated. In Selby-on-the-Bay, during the entire year, snow falls for 8.3 days and aggregates up to 1.22" (31mm) of snow.

Ocean temperature

In Selby-on-the-Bay, in December, the average water temperature is 52°F (11.1°C).
Note: Engaging in a swim in 52°F (11.1°C) can threaten life. Brief exposure to 55.4°F (13°C) waters is uneasy, and submersion below 50°F (10°C) can lead to cold shock and disrupted breathing patterns, varying by individual.

Daylight

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

Sunshine

The average sunshine in December 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 Selby-on-the-Bay. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Frequently asked questions

What is the temperature in December in Selby-on-the-Bay?

Selby-on-the-Bay in December has an average high-temperature of 46°F (7.8°C) and an average low-temperature of 36.5°F (2.5°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 89.6°F (32°C).

What is the average humidity in December in Selby-on-the-Bay?

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

How much does it rain in Selby-on-the-Bay 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 Selby-on-the-Bay, during December, snow falls for 1.5 days and regularly aggregates up to 0.12" (3mm) of snow.

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

In Selby-on-the-Bay, Maryland, in December, the average water temperature is 52°F (11.1°C). Swimming in 52°F (11.1°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 in Selby-on-the-Bay?

With an average of 9h and 30min of daylight, December has the shortest days of the year in Selby-on-the-Bay, Maryland.

What is the average length of the day in December in Selby-on-the-Bay?

In December, the average day length in Selby-on-the-Bay is 9h and 29min.

When are sunrise and sunset in December in Selby-on-the-Bay?

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 in Selby-on-the-Bay is 5.2h.

What is the month with the lowest UV index in Selby-on-the-Bay?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Selby-on-the-Bay.

What is the UV index reading in December in Selby-on-the-Bay?

In December, the average daily maximum UV index in Selby-on-the-Bay is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
54.5°F 12.5°C
46°F 7.8°C
40.3°F 4.6°C
Average low temperature
43.2°F 6.2°C
36.5°F 2.5°C
29.8°F -1.2°C
Average pressure
30.13" 765mmHg
30.11" 765mmHg
30.1" 765mmHg
Average wind speed
9.3mph 15km/h
9.3mph 15km/h
10mph 16.1km/h
Average max. wind speed
9.9mph 15.9km/h
9.9mph 15.9km/h
10.7mph 17.2km/h
Average wind speed gusts
15.2mph 24.5km/h
15.1mph 24.3km/h
16mph 25.7km/h
Average humidity
72%
75%
72%
Average rainfall
0.51" 13mm
0.67" 17mm
0.47" 12mm
Average rainfall days
5.3
7.4
6
Average snowfall
0.04" 1mm
0.12" 3mm
0.67" 17mm
Average snowfall days
0.4
1.5
2.3
Average sea temperature
58.4°F 14.7°C
52°F 11.1°C
47.8°F 8.8°C
Average daylight
10h 1min
9h 3min
9h 5min
Average sunshine
5h 5min
5h 1min
5h 2min
Average sunshine days
23.4
21.5
23
Average UV index
3
2
2
Average cloud cover
36%
44%
43%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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).

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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).

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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).

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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).

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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).

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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).

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Selby-on-the-Bay, Maryland, USA

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