December weather forecastNorthbrook, MD
December
Weather in December
The first month of the winter, December, is also a frosty month in Northbrook, Maryland, with an average temperature ranging between min 30.4°F (-0.9°C) and max 42.8°F (6°C).Temperature
Northbrook's December weather shows a modest shift in high-temperatures, falling from November's fresh 51.3°F (10.7°C) to a chilly 42.8°F (6°C). An average nighttime temperature of 30.4°F (-0.9°C) is recorded during December.Humidity
In December, the average relative humidity is 79%.Rainfall
In December, the rain falls for 11 days. Throughout December, 2.4" (61mm) of precipitation is accumulated. Throughout the year, there are 158.9 rainfall days, and 32.68" (830mm) of precipitation is accumulated.Snowfall
Months with snowfall in Northbrook are January through April, October through December. In December, it is snowing for 3.9 days. Throughout December, 1.93" (49mm) of snow is accumulated. In Northbrook, during the entire year, snow falls for 23.9 days and aggregates up to 13.31" (338mm) 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 7:09 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:53 pm EST.
Sunshine
The average sunshine in December in Northbrook is 4.9h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Northbrook, Maryland. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Northbrook, MD
- Average high temperature in December: 42.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in December: 30.4°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in December
Northbrook, 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
Northbrook, MD
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Northbrook, MD
- Average humidity in December: 79%
The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are January, April, July and November (76%).
Average rainfall in December
Northbrook, MD
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is February (2.13").
Average rainfall days in December
Northbrook, MD
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in December
Northbrook, MD
- Average snowfall in December: 1.93"
The month with the highest snowfall is March (4.06").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Northbrook, MD
- Average snowfall days in December: 3.9 days
The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Northbrook, MD
- Average daylight in December: 9h and 24min
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: 4h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days in December
Northbrook, MD
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in December
Northbrook, 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
Northbrook, MD
- Average cloud cover in December: 48
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Northbrook, MD
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
