December weather forecast
Barstow, MD

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Weather in December

The first month of the winter, December, is still a chilly month in Barstow, Maryland, with an average temperature ranging between min 36.5°F (2.5°C) and max 46.6°F (8.1°C).

Temperature

In December, the average high-temperature marginally decreases from a cool 54.9°F (12.7°C) in November to a frosty 46.6°F (8.1°C). Throughout the month of December, the nighttime temperature dips to an average of 36.5°F (2.5°C).

Humidity

In Barstow, the average relative humidity in December is 76%.

Rainfall

In Barstow, in December, it is raining for 10.6 days, with typically 2.13" (54mm) of accumulated precipitation. In Barstow, during the entire year, the rain falls for 158.1 days and collects up to 33.07" (840mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In Barstow, in December, during 1.7 snowfall days, 0.71" (18mm) of snow is typically accumulated. Throughout the year, there are 10.6 snowfall days, and 5.51" (140mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 30min of daylight.
On the first day of December, sunrise is at 7:05 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:55 pm EST.

Sunshine

In Barstow, the average sunshine in December is 5.1h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: A daily maximum UV index of 2 in December translates into the following instructions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Updated: Jun 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures in Barstow?

The average high-temperature and low-temperature during December are 46.6°F (8.1°C) and 36.5°F (2.5°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, is estimated at 91.4°F (33°C).

What is the average humidity in December?

The average relative humidity in December is 76%.

How many days does it rain in December?

In Barstow, in December, during 10.6 rainfall days, 2.13" (54mm) of precipitation is typically accumulated.

How much does it snow in December?

In Barstow, in December, snow falls for 1.7 days, with typically accumulated 0.71" (18mm) of snow.

What is the month with the shortest days?

With an average of 9h and 30min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In Barstow, the average day length in December is 9h and 32min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:45 pm. On the last day of the month, in Barstow, sunrise is at 7:23 am and sunset at 4:55 pm EST.

How many hours of sunshine does Barstow have in December?

In December, the average sunshine duration is 5.1h.

What are the months with the lowest UV index?

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

How high is the UV index in December?

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

Average temperature in December - Barstow, MD
  • Average high temperature in December: 46.6°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in December: 36.5°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (30°F).

Average pressure in December
Barstow, MD

Average pressure in December - Barstow, 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 (29.95"Hg).

Average wind speed in December
Barstow, MD

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

The windiest month (with the highest average wind speed) is March (9.2mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).

Average humidity in December
Barstow, MD

Average humidity in December - Barstow, MD
  • Average humidity in December: 76%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is January (72%).

Average rainfall in December
Barstow, MD

Average rainfall in December - Barstow, MD
  • Average rainfall in December: 2.13"

The wettest month (with the highest rainfall) is July (4.41").
The driest month (with the least rainfall) is January (1.81").

Average rainfall days in December
Barstow, MD

Average rainfall days in December - Barstow, MD
  • Average rainfall days in December: 10.6 days

The month with the highest number of rainy days is August (17.7 days).
The month with the least rainy days is November (8 days).

Average snowfall in December
Barstow, MD

Average snowfall in December - Barstow, MD
  • Average snowfall in December: 0.71"

The month with the highest snowfall is January (1.85").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Barstow, MD

Average snowfall days in December - Barstow, MD
  • Average snowfall days in December: 1.7 days

The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Barstow, MD
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in December
Barstow, MD

Average sunshine days in December - Barstow, MD
  • Average sunshine days in December: 18.2 days

The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is August (11.3 days).

Average UV index in December
Barstow, MD

Average UV index in December - Barstow, 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 and December (UV index 2).

Average cloud cover in December
Barstow, MD

Average cloud cover in December - Barstow, MD
  • Average cloud cover in December: 44

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in December
Barstow, MD

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

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

Barstow, Maryland, USA

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