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
In Mercer, the onset of December is marked by a decreased average high-temperature, declining from November's icy 37.6°F (3.1°C) to a freezing cold 22.3°F (-5.4°C). Mercer's nights in December experience an average temperature drop to an extreme cold 10.6°F (-11.9°C).Humidity
In Mercer, the average relative humidity in December is 87%.Rainfall
In December, the rain falls for 2.9 days. Throughout December, 0.67" (17mm) of precipitation is accumulated. Throughout the year, in Mercer, North Dakota, there are 100.5 rainfall days, and 15.2" (386mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Mercer, during December, snow falls for 14.5 days and regularly aggregates up to 3.7" (94mm) of snow. In Mercer, during the entire year, snow falls for 72.6 days and aggregates up to 21.14" (537mm) of snow.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year in Mercer.On the first day of December, sunrise is at 8:10 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 8:30 am and sunset at 5:01 pm CST.
Sunshine
In December, the average sunshine is 3.9h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 1 during December translates into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. 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
How cold is December in Mercer?
What is the average humidity in December in Mercer?
How many days does it rain in December in Mercer?
How many days does it snow in December in Mercer?
What is the month with the shortest days in Mercer?
What is the average length of the day in December in Mercer?
When is the sunrise / sunset in December in Mercer?
How many hours of sunshine does Mercer have in December?
What is the month with the lowest UV index in Mercer?
What is the UV index reading in December in Mercer?
Average temperature in December
Mercer, ND
- Average high temperature in December: 22.3°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (19.8°F).
- Average low temperature in December: 10.6°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in December
Mercer, ND
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Mercer, ND
- Average wind speed in December: 10.1mph
The windiest months (with the highest average wind speed) are April and October (11.1mph).
The calmest month (with the lowest average wind speed) is August (8.8mph).
Average humidity in December
Mercer, ND
- Average humidity in December: 87%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (55%).
Average rainfall in December
Mercer, ND
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is June (2.6").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days in December
Mercer, ND
- Average rainfall days in December: 2.9 days
The month with the highest number of rainy days is June (14.9 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in December
Mercer, ND
- Average snowfall in December: 3.7"
The month with the highest snowfall is January (3.78").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mercer, ND
- Average snowfall days in December: 14.5 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Mercer, ND
- Average daylight in December: 8h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Mercer, ND
- Average sunshine days in December: 15.1 days
The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is April (12.8 days).
Average UV index in December
Mercer, ND
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Mercer, ND
- Average cloud cover in December: 60
The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in December
Mercer, ND
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Mercer, North Dakota, USA
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