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
Mattawan's weather changes with the onset of December, slightly falling from a chilly 45.7°F (7.6°C) in November to a wintry 34.7°F (1.5°C). A modest nighttime temperature average of 26.2°F (-3.2°C) characterizes December in Mattawan, Michigan.Humidity
The average relative humidity in December in Mattawan is 84%.Rainfall
In Mattawan, in December, it is raining for 9.6 days, with typically 1.97" (50mm) of accumulated precipitation. Throughout the year, in Mattawan, there are 164 rainfall days, and 29.69" (754mm) of precipitation is accumulated.Snowfall
Months with snowfall in Mattawan are January through May, October through December. In Mattawan, in December, during 15.7 snowfall days, 4.29" (109mm) of snow is typically accumulated. Throughout the year, in Mattawan, there are 71.3 snowfall days, and 24.69" (627mm) of snow is accumulated.Daylight
The month with the shortest days in Mattawan, Michigan, is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:52 am and sunset at 5:11 pm. On the last day of December, in Mattawan, Michigan, sunrise is at 8:11 am and sunset at 5:21 pm EST.
Sunshine
The average sunshine in December in Mattawan is 3.2h.UV index
The month with the lowest UV index in Mattawan is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 1 during December translates into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
How cold is it in Mattawan in December?
What is the average humidity in December in Mattawan?
How much does it rain in Mattawan in December?
How much does it snow in Mattawan in December?
What is the month with the shortest days in Mattawan?
What is the average length of the day in December in Mattawan?
What time are sunrise and sunset in December in Mattawan?
How long on average sun shines in December in Mattawan?
When is the lowest UV index in Mattawan?
What is the UV index intensity in December in Mattawan?
Average temperature in December
Mattawan, MI
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in December: 26.2°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Mattawan, MI
- Average pressure in December: 30.08"Hg
The months with the highest atmospheric pressure are January, March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Mattawan, MI
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in December
Mattawan, MI
- Average humidity in December: 84%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in December
Mattawan, MI
- Average rainfall in December: 1.97"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in December
Mattawan, MI
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in December
Mattawan, MI
- Average snowfall in December: 4.29"
The month with the highest snowfall is January (6.22").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mattawan, MI
- Average snowfall days in December: 15.7 days
The month with the highest number of snowfall days is January (19.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mattawan, MI
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in December
Mattawan, MI
- Average sunshine days in December: 9.3 days
The month with the most sunshine days is September (13.5 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in December
Mattawan, MI
- Average UV index in December: 1
The month with the highest UV index is August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Mattawan, MI
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Mattawan, MI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Mattawan, Michigan, USA
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