December weather forecastCambridge, MD
December
Weather in December
December ushers in winter in its full intensity in Cambridge, Maryland. Cold weather engulfs the city, with temperatures often dipping close to freezing. December is imbued with the winter chill that carries along an array of festive celebrations. Snowfall is common, laying down a fresh, white layer that creates a winter wonderland effect. However, the highlight of December is the cold nights, which are at the yearly lowest, averaging a chilling 36.5°F (2.5°C), complementing the festive spirit with perfect winter weather.Temperature
December's arrival in Cambridge subtly correlates with a reduction in the average high-temperature, down from a cool 55°F (12.8°C) in November to a chilly 46.9°F (8.3°C). The temperature lowers to an average of 36.5°F (2.5°C) during December nights.Humidity
In December, the average relative humidity is 76%.Rainfall
In December, the rain falls for 8.4 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. In Cambridge, during the entire year, the rain falls for 109.9 days and collects up to 10.91" (277mm) of precipitation.Snowfall
Months with snowfall in Cambridge are January through March, November and December. The month with the most snowfall is December, when snow falls for 1.5 days and typically aggregates up to 0.51" (13mm) of snow.Ocean temperature
In Cambridge, the average seawater temperature in December is 44.6°F (7°C).Note: Entering waters of 44.6°F (7°C) is life-endangering. A mere moment in 55.4°F (13°C) waters feels piercing cold, and below 50°F (10°C) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience.
Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:03 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:53 pm EST.
Sunshine
February and December, with an average of 5.2h of sunshine, are months with the least sunshine in Cambridge.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Cambridge. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cambridge, MD
- Average high temperature in December: 46.9°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 (41.2°F).
- Average low temperature in December: 36.5°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure in December
Cambridge, 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
Cambridge, MD
- Average wind speed in December: 8.9mph
The windiest month (with the highest average wind speed) is February (10mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Cambridge, 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 (73%).
Average rainfall in December
Cambridge, MD
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is August (1.46").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in December
Cambridge, MD
- Average rainfall days in December: 8.4 days
The month with the highest number of rainy days is August (11.6 days).
The months with the least rainy days are January and November (6.3 days).
Average snowfall in December
Cambridge, MD
- Average snowfall in December: 0.51"
The month with the highest snowfall is December (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Cambridge, MD
- Average snowfall days in December: 1.5 days
The month with the highest number of snowfall days is January (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in December
Cambridge, MD
- Average sea temperature in December: 45°F
The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (34°F).
Average daylight in December /
Average sunshine in December
Cambridge, MD
- Average daylight in December: 9h and 30min
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 12min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).
Average sunshine days in December
Cambridge, MD
- Average sunshine days in December: 20.4 days
The month with the most sunshine days is November (22.2 days).
The month with the least sunshine days is August (16.8 days).
Average UV index in December
Cambridge, 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
Cambridge, 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 28).
Average visibility in December
Cambridge, 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).
