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
December's onset brings a negligible change in high-temperatures, falling from a fresh 54.5°F (12.5°C) in November to a chilly 46.6°F (8.1°C). Hillsboro's nighttime temperature in December drops to an average of 35.8°F (2.1°C).Humidity
In December, the average relative humidity in Hillsboro is 77%.Rainfall
In Hillsboro, during December, the rain falls for 9.9 days and regularly aggregates up to 2.2" (56mm) of precipitation. In Hillsboro, Maryland, during the entire year, the rain falls for 154.5 days and collects up to 28.66" (728mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Hillsboro, Maryland, in December, snow falls for 1.3 days, with typically accumulated 0.55" (14mm) of snow. Throughout the year, in Hillsboro, there are 9.1 snowfall days, and 4.21" (107mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Hillsboro.On the first day of the month, sunrise is at 7:04 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:51 pm EST.
Sunshine
In Hillsboro, Maryland, the average sunshine in December is 5.3h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
What is the average December temperature in Hillsboro?
What is the average humidity in December in Hillsboro?
How much does it rain in Hillsboro in December?
How much does it snow in Hillsboro in December?
What is the month with the shortest days in Hillsboro?
What is the average length of the day in December in Hillsboro?
When are sunrise and sunset in December in Hillsboro?
How long on average sun shines in December in Hillsboro?
What is the month with the lowest UV index in Hillsboro?
How high is the UV index in December in Hillsboro?
Average temperature in December
Hillsboro, MD
- Average high temperature in December: 46.6°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (40.5°F).
- Average low temperature in December: 35.8°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).
Average pressure in December
Hillsboro, MD
- Average pressure in December: 30.1"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
Hillsboro, MD
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Hillsboro, MD
- Average humidity in December: 77%
The months with the highest relative humidity are May and August (79%).
The month with the lowest relative humidity is January (73%).
Average rainfall in December
Hillsboro, MD
- Average rainfall in December: 2.2"
The wettest month (with the highest rainfall) is August (3.46").
The driest month (with the least rainfall) is January (1.69").
Average rainfall days in December
Hillsboro, MD
- Average rainfall days in December: 9.9 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is November (7.9 days).
Average snowfall in December
Hillsboro, MD
- Average snowfall in December: 0.55"
The month with the highest snowfall is January (1.5").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Hillsboro, MD
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is January (3.3 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
Hillsboro, 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 2min
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 6min).
Average sunshine days in December
Hillsboro, MD
- Average sunshine days in December: 18.4 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in December
Hillsboro, 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
Hillsboro, MD
- Average cloud cover in December: 44
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in December
Hillsboro, 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).
Hillsboro, Maryland, USA
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