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
A moderate decline in the average high-temperature is seen during December, decreasing from a frosty 44.1°F (6.7°C) in November to a wintry 32.9°F (0.5°C). Merrill's nights throughout December are marked by an average low temperature of 24.4°F (-4.2°C), a minor drop from the day's high.Humidity
In December, the average relative humidity is 84%.Rainfall
In December, the rain falls for 9.2 days. Throughout December, 1.46" (37mm) of precipitation is accumulated. Throughout the year, there are 144.5 rainfall days, and 22.13" (562mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In December, it is snowing for 15.2 days. Throughout December, 4.13" (105mm) of snow is accumulated. In Merrill, during the entire year, snow falls for 71.4 days and aggregates up to 19.96" (507mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 7:50 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 8:09 am and sunset at 5:11 pm EST.
Sunshine
The average sunshine in December is 3.3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Merrill. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum high UV index of 1 in December translates into the following recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. During bright days, sunglasses that offer UVA and UVB defense are recommended. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December in Merrill?
How many days does it rain in December?
How many days does it snow in December in Merrill?
What is the month with the shortest days in Merrill?
How many hours of daylight does Merrill have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Merrill have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Merrill, MI
- Average high temperature in December: 32.9°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in December: 24.4°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Merrill, MI
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Merrill, MI
- Average wind speed in December: 9.4mph
The windiest months (with the highest average wind speed) are February and April (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in December
Merrill, MI
- Average humidity in December: 84%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Merrill, MI
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is November (1.22").
Average rainfall days in December
Merrill, MI
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in December
Merrill, MI
- Average snowfall in December: 4.13"
The month with the highest snowfall is January (5.08").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Merrill, MI
- Average snowfall days in December: 15.2 days
The month with the highest number of snowfall days is January (18.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Merrill, MI
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 3h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in December
Merrill, MI
- Average sunshine days in December: 10.6 days
The month with the most sunshine days is September (16.5 days).
The month with the least sunshine days is February (8.4 days).
Average UV index in December
Merrill, MI
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Merrill, MI
- Average cloud cover in December: 66
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Merrill, MI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, October and November (6mi).
The months with the lowest visibility are January, February, September and December (5mi).
Merrill, Michigan, USA
Weather forecast for your location
2. Allow the app to use your location