December weather forecast
Joppa, MD

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Weather in December

December, the first month of the winter in Joppa, is also a frosty month, with an average temperature ranging between max 43.7°F (6.5°C) and min 32.2°F (0.1°C).

Temperature

December implies a gentle temperature shift, with average high-temperatures reducing from November's cool 52.9°F (11.6°C) to a frosty 43.7°F (6.5°C). Joppa, during the month of December, experiences an average low-temperature of 32.2°F (0.1°C).

Humidity

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

Rainfall

In December, the rain falls for 9.8 days. Throughout December, 2.76" (70mm) of precipitation is accumulated. Throughout the year, there are 155.7 rainfall days, and 32.64" (829mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, November and December. In Joppa, Maryland, in December, during 3.4 snowfall days, 1.38" (35mm) of snow is typically accumulated. Throughout the year, there are 19.9 snowfall days, and 9.72" (247mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:07 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:52 pm EST.

Sunshine

In Joppa, the average sunshine in December is 5h.

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 value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index, 2 during December, leads to the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Boost your sun resistance with garments that are densely woven yet spacious. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.

Frequently asked questions

Is December cold?

December temperatures vary between a high-temperature of 43.7°F (6.5°C) and a low-temperature of 32.2°F (0.1°C). In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is computed to be 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 78%.

How many days does it rain in December?

In Joppa, in December, during 9.8 rainfall days, 2.76" (70mm) of precipitation is typically accumulated.

How much does it snow in December?

In December, it is snowing for 3.4 days. Throughout December, 1.38" (35mm) of snow is accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

What is the average length of the day in December?

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

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:07 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:52 pm EST.

How many hours of sunshine does Joppa have in December?

The average sunshine duration in December is 5h.

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.

What is the UV index reading in December?

In Joppa, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health risk 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
Joppa, MD

Average temperature in December - Joppa, MD
  • Average high temperature in December: 43.7°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 (37.6°F).

  • Average low temperature in December: 32.2°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 (25.3°F).

Average pressure in December
Joppa, MD

Average pressure in December - Joppa, 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
Joppa, MD

Average wind speed in December - Joppa, MD
  • Average wind speed in December: 8.3mph

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in December
Joppa, MD

Average humidity in December - Joppa, 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
Joppa, MD

Average rainfall in December - Joppa, MD
  • Average rainfall in December: 2.76"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is February (2.09").

Average rainfall days in December
Joppa, MD

Average rainfall days in December - Joppa, MD
  • Average rainfall days in December: 9.8 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (8.3 days).

Average snowfall in December
Joppa, MD

Average snowfall in December - Joppa, MD
  • Average snowfall in December: 1.38"

The month with the highest snowfall is March (2.87").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Joppa, MD

Average snowfall days in December - Joppa, MD
  • Average snowfall days in December: 3.4 days

The months with the highest number of snowfall days are January and February (5.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Joppa, 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: 5h and 0min

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 48min).

Average sunshine days in December
Joppa, MD

Average sunshine days in December - Joppa, MD
  • Average sunshine days in December: 17.8 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.7 days).

Average UV index in December
Joppa, MD

Average UV index in December - Joppa, 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
Joppa, MD

Average cloud cover in December - Joppa, MD
  • Average cloud cover in December: 46

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Joppa, MD

Average visibility in December - Joppa, 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).

Joppa, Maryland, USA

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