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
With December's arrival, Mattawan sees a decrease in average high-temperatures, moving from a frosty 45.7°F (7.6°C) in November to an icy 34.7°F (1.5°C). The temperature during December sees a subtle transition from day to night, averaging a low of 26.2°F (-3.2°C).Humidity
In December, the average relative humidity in Mattawan, Michigan, is 84%.Rainfall
In Mattawan, in December, it is raining for 9.6 days, with typically 1.97" (50mm) of accumulated precipitation. In Mattawan, during the entire year, the rain falls for 164 days and collects up to 29.69" (754mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Mattawan, during December, snow falls for 15.7 days and regularly aggregates up to 4.29" (109mm) of snow. In Mattawan, Michigan, during the entire year, snow falls for 71.3 days and aggregates up to 24.69" (627mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:52 am and sunset at 5:11 pm. On the last day of the month, sunrise is at 8:11 am and sunset at 5:21 pm EST.
Sunshine
In December, the average sunshine is 3.2h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 1 during December translates into these guidelines:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
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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