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
As December begins, there is a decrease in the average high-temperature, falling from a frosty 47.3°F (8.5°C) in November to a wintry 35.6°F (2°C). Mazon records a consistent low-temperature of 25.7°F (-3.5°C) during December nights.Humidity
In Mazon, the average relative humidity in December is 81%.Rainfall
In Mazon, during December, the rain falls for 7.2 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, there are 140.4 rainfall days, and 21.5" (546mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Mazon, in December, during 8.5 snowfall days, 1.42" (36mm) of snow is typically accumulated. In Mazon, during the entire year, snow falls for 38.1 days and aggregates up to 9.13" (232mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Mazon.On the first day of the month, sunrise is at 7:00 am and sunset at 4:25 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:34 pm CST.
Sunshine
In December, the average sunshine in Mazon is 4.3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Mazon. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A typical high UV index of 1 in December suggests the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Mazon in December?
What is the average humidity in December in Mazon?
How many days does it rain in December in Mazon?
How many days does it snow in December in Mazon?
What is the month with the shortest days in Mazon?
How many hours of daylight does Mazon have in December?
When is the sunrise / sunset in December in Mazon?
How long on average sun shines in December in Mazon?
What are the months with the lowest UV index in Mazon?
How high is the UV index in December in Mazon?
Average temperature in December
Mazon, IL
- Average high temperature in December: 35.6°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in December
Mazon, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Mazon, IL
- Average wind speed in December: 9.4mph
The windiest months (with the highest average wind speed) are January and April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Mazon, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Mazon, IL
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in December
Mazon, IL
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in December
Mazon, IL
- Average snowfall in December: 1.42"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Mazon, IL
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mazon, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Mazon, IL
- Average sunshine days in December: 17.3 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in December
Mazon, IL
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Mazon, IL
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in December
Mazon, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Mazon, Illinois, USA
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