December weather forecast
Rock Hall, MD

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Weather in December

December, the first month of the winter in Rock Hall, is still a chilly month, with an average temperature fluctuating between 45.5°F (7.5°C) and 34.9°F (1.6°C).

Temperature

Rock Hall's progression into December involves a minor drop in the average high-temperature, slightly receding from a fresh 53.8°F (12.1°C) in November to a chilly 45.5°F (7.5°C). December brings with it a nighttime average temperature of 34.9°F (1.6°C) in Rock Hall, Maryland.

Humidity

In Rock Hall, the average relative humidity in December is 76%.

Rainfall

In Rock Hall, in December, during 7.8 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. Throughout the year, there are 120.1 rainfall days, and 12.87" (327mm) of precipitation is accumulated.

Snowfall

January through April and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 1.5 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 9.8 snowfall days, and 2.01" (51mm) of snow is accumulated.

Ocean temperature

In December, the average ocean temperature is 50.5°F (10.3°C).
Note: One needs to be cautious in 50.5°F (10.3°C) waters. 55.4°F (13°C) is already forbidding, but sub14°F (-10°C) can seriously disrupt your breathing and lead to a frigid shock, considering one's well-being.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year in Rock Hall, Maryland.
On the first day of December, sunrise is at 7:05 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:52 pm EST.

Sunshine

In December, the average sunshine in Rock Hall 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 Rock Hall. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: An average maximum UV index of 2 in December leads to these recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
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Frequently asked questions

What are the temperatures in Rock Hall in December?

In Rock Hall, in December, the average high-temperature is 45.5°F (7.5°C), and the average low-temperature is 34.9°F (1.6°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in August is evaluated at 89.6°F (32°C).

What is the average humidity in December in Rock Hall?

In December, the average relative humidity is 76%.

How much does it rain in Rock Hall in December?

In Rock Hall, Maryland, in December, during 7.8 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

When does it start snowing in Rock Hall?

December is the first month it typically snows in Rock Hall. Throughout December, in the average 1.5 snowfall days, it receives 0.12" (3mm) of snow.

What is the water temperature in December in Rock Hall?

In December, the average ocean temperature is 50.5°F (10.3°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 Rock Hall?

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

How many hours of daylight does Rock Hall have in December?

The average day length in December in Rock Hall, Maryland, is 9h and 28min.

When are sunrise and sunset in December in Rock Hall?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:42 pm. On the last day of the month, in Rock Hall, sunrise is at 7:24 am and sunset at 4:52 pm EST.

How many hours of sunshine does Rock Hall have in December?

In December, the average sunshine duration is 5.2h.

What are the months with the lowest UV index in Rock Hall?

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

What is the UV index intensity in December in Rock Hall?

In December, the average daily maximum UV index in Rock Hall is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
53.8°F 12.1°C
45.5°F 7.5°C
39.2°F 4°C
Average low temperature
41.5°F 5.3°C
34.9°F 1.6°C
28.4°F -2°C
Average pressure
30.13" 765mmHg
30.11" 765mmHg
30.1" 765mmHg
Average wind speed
8.9mph 14.3km/h
9mph 14.5km/h
9.8mph 15.8km/h
Average max. wind speed
9.8mph 15.8km/h
9.8mph 15.8km/h
10.6mph 17.1km/h
Average wind speed gusts
15mph 24.1km/h
15mph 24.1km/h
16.1mph 25.9km/h
Average humidity
73%
76%
74%
Average rainfall
0.67" 17mm
1.02" 26mm
0.55" 14mm
Average rainfall days
5.6
7.8
6.8
Average snowfall
0" 0mm
0.12" 3mm
0.83" 21mm
Average snowfall days
0.2
1.5
3
Average sea temperature
56.8°F 13.8°C
50.6°F 10.3°C
45.1°F 7.3°C
Average daylight
10h 0min
9h 3min
9h 5min
Average sunshine
5h 5min
5h 1min
5h 2min
Average sunshine days
21.9
21
21.9
Average UV index
3
2
2
Average cloud cover
35%
44%
43%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in December
Rock Hall, MD

Average temperature in December - Rock Hall, MD
  • Average high temperature in December: 45.5°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (39.2°F).

  • Average low temperature in December: 34.9°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

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Average pressure in December
Rock Hall, MD

Average pressure in December - Rock Hall, 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
Rock Hall, MD

Average wind speed in December - Rock Hall, MD
  • Average wind speed in December: 9mph

The windiest months (with the highest average wind speed) are January, February and March (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).

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Average humidity in December
Rock Hall, MD

Average humidity in December - Rock Hall, MD
  • Average humidity in December: 76%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is November (73%).

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Average rainfall in December
Rock Hall, MD

Average rainfall in December - Rock Hall, MD
  • Average rainfall in December: 1.02"

The wettest months (with the highest rainfall) are July and August (1.81").
The driest month (with the least rainfall) is January (0.55").

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Average rainfall days in December
Rock Hall, MD

Average rainfall days in December - Rock Hall, MD
  • Average rainfall days in December: 7.8 days

The month with the highest number of rainy days is July (14.6 days).
The month with the least rainy days is November (5.6 days).

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Average snowfall in December
Rock Hall, MD

Average snowfall in December - Rock Hall, MD
  • Average snowfall in December: 0.12"

The month with the highest snowfall is January (0.83").
The months with the least snowfall are May, June, July, August, September, October and November (0").

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Average snowfall days in December
Rock Hall, MD

Average snowfall days in December - Rock Hall, MD
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is January (3 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
Rock Hall, MD

Average sea temperature in December - Rock Hall, MD
  • Average sea temperature in December: 50.6°F

The best month for swimming (with the highest average sea temperature) is August (77.2°F).
The coldest month (with the lowest average sea temperature) is February (43.7°F).

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Average daylight in December /
Average sunshine in December
Rock Hall, MD

Average daylight in December / Average sunshine in December - Rock Hall, 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 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

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Average sunshine days in December
Rock Hall, MD

Average sunshine days in December - Rock Hall, MD
  • Average sunshine days in December: 21 days

The months with the most sunshine days are January and November (21.9 days).
The month with the least sunshine days is July (14.1 days).

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Average UV index in December
Rock Hall, MD

Average UV index in December - Rock Hall, 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
Rock Hall, MD

Average cloud cover in December - Rock Hall, MD
  • Average cloud cover in December: 44

The months with the most cloud cover are February, March and December (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in December
Rock Hall, MD

Average visibility in December - Rock Hall, 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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Rock Hall, Maryland, USA

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