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
During the transition into December, Mason observes a decrease in the average high-temperature, falling from a frosty 45°F (7.2°C) in November to a wintry 33.6°F (0.9°C). Night temperatures in December exhibit a subtle decrease, settling at an average of 24.8°F (-4°C).Humidity
In Mason, the average relative humidity in December is 84%.Rainfall
In Mason, in December, it is raining for 4.5 days, with typically 0.39" (10mm) of accumulated precipitation. In Mason, during the entire year, the rain falls for 96.4 days and collects up to 7.32" (186mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Mason. In Mason, during December, snow falls for 8.5 days and regularly aggregates up to 0.47" (12mm) of snow. In Mason, during the entire year, snow falls for 42.9 days and aggregates up to 3.86" (98mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:48 am and sunset at 5:05 pm. On the last day of December, sunrise is at 8:07 am and sunset at 5:14 pm EST.
Sunshine
The average sunshine in December is 3.2h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
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?
How many days does it rain in December?
How much does it snow in Mason in December?
What is the month with the shortest days?
How many hours of daylight does Mason have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index reading in December in Mason?
Average temperature in December
Mason, MI
- Average high temperature in December: 33.6°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 (27.7°F).
- Average low temperature in December: 24.8°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Mason, MI
- Average pressure in December: 30.07"Hg
The months with the highest atmospheric pressure are March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Mason, MI
- Average wind speed in December: 9.8mph
The windiest months (with the highest average wind speed) are January, February and April (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in December
Mason, MI
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Mason, MI
- Average rainfall in December: 0.39"
The wettest month (with the highest rainfall) is May (0.94").
The driest month (with the least rainfall) is February (0.35").
Average rainfall days in December
Mason, MI
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is May (12.7 days).
The month with the least rainy days is February (3 days).
Average snowfall in December
Mason, MI
- Average snowfall in December: 0.47"
The month with the highest snowfall is February (1.14").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mason, MI
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mason, MI
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in December
Mason, MI
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is December (20.9 days).
The month with the least sunshine days is May (14.8 days).
Average UV index in December
Mason, 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
Mason, MI
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Mason, MI
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are January, August and September (5mi).
Mason, Michigan, USA
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