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
The shift from November to December involves a decrease in the average high-temperature, from a chilly 48.9°F (9.4°C) to a cold 37°F (2.8°C). During December, the average low-temperature is a freezing cold 25.7°F (-3.5°C).Humidity
The average relative humidity in December in Macomb is 79%.Rainfall
In Macomb, in December, it is raining for 5.6 days, with typically 0.75" (19mm) of accumulated precipitation. In Macomb, during the entire year, the rain falls for 122.7 days and collects up to 17.8" (452mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Macomb, in December, during 4.9 snowfall days, 0.79" (20mm) of snow is typically accumulated. In Macomb, during the entire year, snow falls for 25.2 days and aggregates up to 5.47" (139mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:07 am and sunset at 4:36 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:46 pm CST.
Sunshine
In Macomb, the average sunshine in December is 4.6h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In December, a daily UV index of 2 turns into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
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 December?
What is the month with the shortest days in Macomb?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Macomb have in December?
What are the months with the lowest UV index in Macomb?
How high is the UV index in December in Macomb?
Average temperature in December
Macomb, IL
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Macomb, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Macomb, IL
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in December
Macomb, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Macomb, IL
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in December
Macomb, IL
- Average rainfall days in December: 5.6 days
The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is January (4.2 days).
Average snowfall in December
Macomb, IL
- Average snowfall in December: 0.79"
The month with the highest snowfall is January (1.89").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Macomb, IL
- Average snowfall days in December: 4.9 days
The month with the highest number of snowfall days is January (7.6 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
Macomb, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Macomb, IL
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is June (12.2 days).
Average UV index in December
Macomb, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Macomb, IL
- Average cloud cover in December: 51
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
Macomb, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Macomb, Illinois, USA
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