Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The move into December indicates a slight reduction in the average high-temperature, down from November's fresh 53.2°F (11.8°C) to a frosty 44.8°F (7.1°C). In Monumental, the nighttime temperature averages to a cold 33.4°F (0.8°C) during December.Humidity
The average relative humidity in December in Monumental is 75%.Rainfall
In December, the rain falls for 10.1 days. Throughout December, 2.36" (60mm) of precipitation is accumulated. Throughout the year, there are 158.5 rainfall days, and 30.75" (781mm) of precipitation is accumulated.Snowfall
Months with snowfall in Monumental are January through March, November and December. In Monumental, during December, snow falls for 2.2 days and regularly aggregates up to 0.63" (16mm) of snow. In Monumental, during the entire year, snow falls for 12.8 days and aggregates up to 6.06" (154mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:07 am and sunset at 4:44 pm. On the last day of December, in Monumental, Maryland, sunrise is at 7:26 am and sunset at 4:53 pm EST.
Sunshine
In Monumental, the average sunshine in December is 5.2h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Monumental. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What are December temperatures in Monumental?
What is the average humidity in December in Monumental?
How many days does it rain in December in Monumental?
How much does it snow in Monumental in December?
What is the month with the shortest days in Monumental?
How many hours of daylight does Monumental have in December?
What time are sunrise and sunset in December in Monumental?
How long on average sun shines in December in Monumental?
What is the month with the lowest UV index in Monumental?
How high is the UV index in December in Monumental?
Average temperature in December
Monumental, MD
- Average high temperature in December: 44.8°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (38.5°F).
- Average low temperature in December: 33.4°F
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).
Average pressure in December
Monumental, 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 (29.94"Hg).
Average wind speed in December
Monumental, MD
- Average wind speed in December: 8.4mph
The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in December
Monumental, MD
- Average humidity in December: 75%
The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are April, July and November (72%).
Average rainfall in December
Monumental, MD
- Average rainfall in December: 2.36"
The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in December
Monumental, MD
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is November (8.4 days).
Average snowfall in December
Monumental, MD
- Average snowfall in December: 0.63"
The month with the highest snowfall is January (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Monumental, MD
- Average snowfall days in December: 2.2 days
The month with the highest number of snowfall days is January (4.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Monumental, MD
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in December
Monumental, MD
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in December
Monumental, 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
Monumental, 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
Monumental, 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).
Monumental, Maryland, USA
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