December weather forecast
Keedysville, MD

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Weather in December

December, the first month of the winter in Keedysville, is still a cold month, with an average temperature fluctuating between 30.2°F (-1°C) and 42.3°F (5.7°C).

Temperature

Onset of December witnesses a reduction in the average high-temperature, falling from a fresh 51.6°F (10.9°C) in November to a wintry 42.3°F (5.7°C). Keedysville records an average nighttime low of 30.2°F (-1°C) in December.

Humidity

May, October and December, with an average relative humidity of 79%, are the most humid months.

Rainfall

In Keedysville, in December, during 10.8 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. In Keedysville, during the entire year, the rain falls for 162.4 days and collects up to 30.16" (766mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. In Keedysville, Maryland, in December, snow falls for 4.5 days, with typically accumulated 2.09" (53mm) of snow. In Keedysville, during the entire year, snow falls for 24.4 days and aggregates up to 14.29" (363mm) of snow.

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 7:12 am and sunset at 4:47 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:57 pm EST.

Sunshine

In Keedysville, the average sunshine in December is 4.8h.

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 minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.

Frequently asked questions

How cold is it in Keedysville in December?

The average high-temperature, in December, in Keedysville, is 42.3°F (5.7°C), while the average low-temperature is 30.2°F (-1°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is calculated to be 91.4°F (33°C).

What are the most humid months?

May, October and December, with an average relative humidity of 79%, are most humid months.

What is the average humidity in December?

In Keedysville, the average relative humidity in December is 79%.

How many days does it rain in December?

In Keedysville, Maryland, in December, during 10.8 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Keedysville, in December, snow falls for 4.5 days, with typically accumulated 2.09" (53mm) 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 Keedysville.

How many hours of daylight does Keedysville have in December?

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

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:12 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:57 pm EST.

How many hours of sunshine does Keedysville have in December?

In Keedysville, the average sunshine duration in December is 4.8h.

What is the month 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 intensity in December?

In Keedysville, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to UV radiation.
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
Keedysville, MD

Average temperature in December - Keedysville, MD
  • Average high temperature in December: 42.3°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in December: 30.2°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure in December
Keedysville, MD

Average pressure in December - Keedysville, 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
Keedysville, MD

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

The windiest months (with the highest average wind speed) are January, February and March (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in December
Keedysville, MD

Average humidity in December - Keedysville, MD
  • Average humidity in December: 79%

The months with the highest relative humidity are May, October and December (79%).
The month with the lowest relative humidity is July (74%).

Average rainfall in December
Keedysville, MD

Average rainfall in December - Keedysville, MD
  • Average rainfall in December: 2.2"

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is January (1.97").

Average rainfall days in December
Keedysville, MD

Average rainfall days in December - Keedysville, MD
  • Average rainfall days in December: 10.8 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (9.4 days).

Average snowfall in December
Keedysville, MD

Average snowfall in December - Keedysville, MD
  • Average snowfall in December: 2.09"

The month with the highest snowfall is January (4.72").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Keedysville, MD

Average snowfall days in December - Keedysville, MD
  • Average snowfall days in December: 4.5 days

The month with the highest number of snowfall days is January (7.8 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
Keedysville, MD

Average daylight in December / Average sunshine in December - Keedysville, 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
Keedysville, MD

Average sunshine days in December - Keedysville, MD
  • Average sunshine days in December: 16.4 days

The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is April (11 days).

Average UV index in December
Keedysville, MD

Average UV index in December - Keedysville, 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
Keedysville, MD

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

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in December
Keedysville, MD

Average visibility in December - Keedysville, MD
  • Average visibility in December: 5mi

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

Keedysville, Maryland, USA

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