December weather forecast
Forest Hill, MD

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Weather in December

The first month of the winter, December, is also a frosty month in Forest Hill, Maryland, with temperature in the range of an average high of 43.7°F (6.5°C) and an average low of 32.2°F (0.1°C).

Temperature

The average high-temperature decreases in December, shifting from a fresh 52.9°F (11.6°C) in November to a frosty 43.7°F (6.5°C). In the month of December, an average of 32.2°F (0.1°C) marks the low-temperature.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In December, the rain falls for 9.8 days. Throughout December, 2.76" (70mm) of precipitation is accumulated. In Forest Hill, during the entire year, the rain falls for 155.7 days and collects up to 32.64" (829mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall. In Forest Hill, during December, snow falls for 3.4 days and regularly aggregates up to 1.38" (35mm) of snow. In Forest Hill, during the entire year, snow falls for 19.9 days and aggregates up to 9.72" (247mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
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 7:26 am and sunset at 4:51 pm EST.

Sunshine

The average sunshine in December is 5h.

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 reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index of 2 during December translates into these guidelines:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Updated: Aug 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in Forest Hill?

In Forest Hill, 43.7°F (6.5°C) is the average high-temperature and 32.2°F (0.1°C) is the average low-temperature during December. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 87.8°F (31°C).

What is the average humidity in December?

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

How many days does it rain in December?

In December, in Forest Hill, the rain falls for 9.8 days. Throughout December, 2.76" (70mm) of precipitation is 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?

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

How many hours of daylight does Forest Hill have in December?

In Forest Hill, 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 7:07 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:51 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 5h.

When is the lowest UV index?

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

What is the UV index reading in December?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health threat 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
Forest Hill, MD

Average temperature in December - Forest Hill, 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
Forest Hill, MD

Average pressure in December - Forest Hill, 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
Forest Hill, MD

Average wind speed in December - Forest Hill, 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
Forest Hill, MD

Average humidity in December - Forest Hill, 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
Forest Hill, MD

Average rainfall in December - Forest Hill, 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
Forest Hill, MD

Average rainfall days in December - Forest Hill, 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
Forest Hill, MD

Average snowfall in December - Forest Hill, 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
Forest Hill, MD

Average snowfall days in December - Forest Hill, 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
Forest Hill, MD

Average daylight in December / Average sunshine in December - Forest Hill, 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
Forest Hill, MD

Average sunshine days in December - Forest Hill, 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
Forest Hill, MD

Average UV index in December - Forest Hill, 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
Forest Hill, MD

Average cloud cover in December - Forest Hill, 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
Forest Hill, MD

Average visibility in December - Forest Hill, 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).

Forest Hill, Maryland, USA

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