December weather forecastHavre de Grace, MD

December

Weather in December

December marks the return of winter with a definitive plunge in temperatures. With its share of frosty mornings and chilly evenings, Havre de Grace wraps up the year with a winter wonderland feel. The coldest month of the year, December has an average low of 32.9°F (0.5°C), accompanied by an increase in snowfall to 0.87" (22mm). The resulting snowy landscapes amplify the festive spirit, making it a magical time to be in town. Despite the chill, the twinkling holiday decorations and buzzing holiday markets add a warmth that's unique to this time of year.

Temperature

The transition into December subtly indicates a reduction in the average high-temperature, down to a chilly 44.1°F (6.7°C) from November's fresh 52.9°F (11.6°C). Havre de Grace observes an average nighttime temperature of 32.9°F (0.5°C) during December.

Humidity

The average relative humidity in December is 78%.

Rainfall

In December, the rain falls for 9.4 days. Throughout December, 2.4" (61mm) of precipitation is accumulated. In Havre de Grace, during the entire year, the rain falls for 149.9 days and collects up to 29.41" (747mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Havre de Grace, in December, snow falls for 2.2 days, with typically accumulated 0.87" (22mm) of snow. In Havre de Grace, during the entire year, snow falls for 13.7 days and aggregates up to 7.05" (179mm) of snow.

Ocean temperature

In Havre de Grace, the average seawater temperature in December is 49.3°F (9.6°C).
Note: Immersing oneself in 49.3°F (9.6°C) at sub14°F (-10°C) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:06 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:50 pm EST.

Sunshine

The average sunshine in December is 5.1h.

UV index

The months with the lowest UV index are January, February, November 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 unsafe exposure to UV radiation for the average person.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.

Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Havre de Grace in December has an average high-temperature of 44.1°F (6.7°C) and an average low-temperature of 32.9°F (0.5°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 estimated at 89.6°F (32°C).

In Havre de Grace, the average relative humidity in December is 78%.

In Havre de Grace, in December, it is raining for 9.4 days, with typically 2.4" (61mm) of accumulated precipitation.

In December, it is snowing for 2.2 days. Throughout December, 0.87" (22mm) of snow is accumulated.

In Havre de Grace, Maryland, in December, the average water temperature is 49.3°F (9.6°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.

With an average of 9h and 24min of daylight, December has the shortest days of the year.

In December, the average day length is 9h and 26min.

In December, on the first day of the month, sunrise is at 7:06 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:50 pm EST.

In December, the average sunshine duration is 5.1h.

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

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health threat from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

52.9°F

44.1°F

37.6°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8.5mph

8.8mph

9.6mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

0.3

2.2

4.6

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

19.9

18.6

18.5

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Havre de Grace, MD

Average high temperature in December: 44.1°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 (37.6°F).

Average low temperature in December: 32.9°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

Average pressure in December
Havre de Grace, MD

Average pressure in December: 30.1"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
Havre de Grace, MD

Average wind speed in December: 8.1mph

The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in December
Havre de Grace, MD

Average humidity in December: 78%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is April (74%).

Average rainfall in December
Havre de Grace, MD

Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is August (3.82").
The driest month (with the least rainfall) is January (1.85").

Average rainfall days in December
Havre de Grace, MD

Average rainfall days in December: 9.4 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (8.3 days).

Average snowfall in December
Havre de Grace, MD

Average snowfall in December: 0.87"

The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Havre de Grace, MD

Average snowfall days in December: 2.2 days

The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in December
Havre de Grace, MD

Average sea temperature in December: 49.3°F

The best month for swimming (with the highest average sea temperature) is August (76.6°F).
The coldest month (with the lowest average sea temperature) is February (42.5°F).

Average daylight in December /
Average sunshine in December
Havre de Grace, MD

Average daylight in December: 9h and 24min

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 24min).

Average sunshine in December: 5h and 6min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in December
Havre de Grace, MD

Average sunshine days in December: 18.6 days

The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (11.1 days).

Average UV index in December
Havre de Grace, 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, November and December (UV index 2).

Average cloud cover in December
Havre de Grace, MD

Average cloud cover in December: 45

The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Havre de Grace, MD

Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).