December weather forecast
Hagerstown, MD

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Bright pink blossoms of flowers, clean paths, a bridge, and scenic trees in the neat lawns of a city park in Hagerstown, Maryland
Bright pink blossoms of flowers, clean paths, a bridge, and scenic trees in the neat lawns of a city park in Hagerstown, Maryland

Weather in December

December in Hagerstown is marked by the arrival of winter in full force. The picturesque snowfall increase from 0.59" (15mm) in November to 2.17" (55mm) in December, painting Hagerstown white. Chilly days bring along a festive mood to the city. Icy winds gust through the month, reinforcing the need for warm clothing. With the holiday season in full swing, the snow-covered city life and decorated streets add to the charm of Hagerstown.

Temperature

The onset of December coincides with a reduction in the average high-temperature, falling from a cool 50.7°F (10.4°C) in November to a cold 41.5°F (5.3°C). In Hagerstown, the average temperature during the nights of December drops to a freezing cold 29.3°F (-1.5°C).

Humidity

In Hagerstown, the average relative humidity in December is 78%.

Rainfall

In Hagerstown, in December, during 11.2 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Hagerstown, during the entire year, the rain falls for 164.7 days and collects up to 29.17" (741mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. In Hagerstown, in December, during 5.2 snowfall days, 2.17" (55mm) of snow is typically accumulated. Throughout the year, there are 28.6 snowfall days, and 14.65" (372mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of December, sunrise is at 7:13 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:56 pm EST.

Sunshine

In December, the average sunshine is 4.9h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, an average UV index of 2 transforms into the following instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.

Frequently asked questions

Is December cold?

The average high-temperature, in December, in Hagerstown, is 41.5°F (5.3°C), while the average low-temperature is 29.3°F (-1.5°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is appraised at 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 78%.

How much does it rain in December?

In Hagerstown, during December, the rain falls for 11.2 days and regularly aggregates up to 2.24" (57mm) of precipitation.

How much does it snow in December?

In Hagerstown, in December, snow falls for 5.2 days, with typically accumulated 2.17" (55mm) of snow.

What is the month with the shortest days?

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

How many hours of daylight does Hagerstown have in December?

In December, the average day length in Hagerstown is 9h and 25min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:13 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:56 pm EST.

How many hours of sunshine does Hagerstown have in December?

In Hagerstown, the average sunshine duration in December is 4.9h.

What are the months with the lowest UV index?

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

How high is the UV index in December?

In Hagerstown, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe 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
Hagerstown, MD

Average temperature in December - Hagerstown, MD
  • Average high temperature in December: 41.5°F

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in December: 29.3°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).

Average pressure in December
Hagerstown, MD

Average pressure in December - Hagerstown, MD
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Hagerstown, MD

Average wind speed in December - Hagerstown, MD
  • Average wind speed in December: 7mph

The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in December
Hagerstown, MD

Average humidity in December - Hagerstown, MD
  • Average humidity in December: 78%

The months with the highest relative humidity are May and October (79%).
The months with the lowest relative humidity are April and July (75%).

Average rainfall in December
Hagerstown, MD

Average rainfall in December - Hagerstown, MD
  • Average rainfall in December: 2.24"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is February (1.97").

Average rainfall days in December
Hagerstown, MD

Average rainfall days in December - Hagerstown, MD
  • Average rainfall days in December: 11.2 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (8.8 days).

Average snowfall in December
Hagerstown, MD

Average snowfall in December - Hagerstown, MD
  • Average snowfall in December: 2.17"

The month with the highest snowfall is January (4.21").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Hagerstown, MD

Average snowfall days in December - Hagerstown, MD
  • Average snowfall days in December: 5.2 days

The month with the highest number of snowfall days is January (9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Hagerstown, MD
  • Average daylight in December: 9h and 2min

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: 4h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in December
Hagerstown, MD

Average sunshine days in December - Hagerstown, MD
  • Average sunshine days in December: 16.3 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.7 days).

Average UV index in December
Hagerstown, MD

Average UV index in December - Hagerstown, MD
  • Average UV index in December: 2

The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Hagerstown, MD

Average cloud cover in December - Hagerstown, MD
  • Average cloud cover in December: 49

The months with the most cloud cover are January, February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Hagerstown, MD

Average visibility in December - Hagerstown, MD
  • Average visibility in December: 6mi

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

Hagerstown, Maryland, USA

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