December weather forecast
Coatsburg, IL

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Weather in December

The first month of the winter, December, is also a wintry month in Coatsburg, Illinois, with an average temperature ranging between max 38.5°F (3.6°C) and min 26.8°F (-2.9°C).

Temperature

The start of December involves a temperature drop, moving from a fresh 50.2°F (10.1°C) in November to a cold 38.5°F (3.6°C). During December, Coatsburg sees a mean low-temperature of 26.8°F (-2.9°C).

Humidity

In Coatsburg, the average relative humidity in December is 78%.

Rainfall

The months with the least rainfall are January and December Rain falls for 5.8 days and accumulates 1.02" (26mm) of rain.

Snowfall

Months with snowfall are January through April, October through December. In Coatsburg, in December, snow falls for 5.5 days, with typically accumulated 1.46" (37mm) of snow. In Coatsburg, during the entire year, snow falls for 27.6 days and aggregates up to 7.95" (202mm) of snow.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:08 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:49 pm CST.

Sunshine

In Coatsburg, the average sunshine in December is 4.7h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, a regular UV index of 2 translates into these guidelines:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Updated: Jun 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

An average high-temperature, in December, in Coatsburg, is 38.5°F (3.6°C) and the average low-temperature is 26.8°F (-2.9°C). The average heat index (a.k.a. 'real feel', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is computed to be 91.4°F (33°C).

What is the average humidity in December?

The average relative humidity in December is 78%.

What is the driest month?

The months with the least rainfall are January and December Rain falls for 5.8 days and accumulates 1.02" (26mm) of rain.

How many days does it rain in December?

In Coatsburg, during December, the rain falls for 5.8 days and regularly aggregates up to 1.02" (26mm) of precipitation.

How much does it snow in December?

In Coatsburg, during December, snow falls for 5.5 days and regularly aggregates up to 1.46" (37mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

What is the average length of the day in December?

In December, the average day length in Coatsburg is 9h and 23min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:08 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:49 pm CST.

How many hours of sunshine does Coatsburg have in December?

In December, the average sunshine duration is 4.7h.

What is the month with the lowest UV index?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the UV index intensity in December?

The average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Coatsburg, IL

Average temperature in December - Coatsburg, IL
  • Average high temperature in December: 38.5°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (32.7°F).

  • Average low temperature in December: 26.8°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).

Average pressure in December
Coatsburg, IL

Average pressure in December - Coatsburg, IL
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
Coatsburg, IL

Average wind speed in December - Coatsburg, IL
  • Average wind speed in December: 9.8mph

The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).

Average humidity in December
Coatsburg, IL

Average humidity in December - Coatsburg, IL
  • Average humidity in December: 78%

The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Coatsburg, IL

Average rainfall in December - Coatsburg, IL
  • Average rainfall in December: 1.02"

The wettest month (with the highest rainfall) is May (3.35").
The driest months (with the least rainfall) are January and December (1.02").

Average rainfall days in December
Coatsburg, IL

Average rainfall days in December - Coatsburg, IL
  • Average rainfall days in December: 5.8 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (5 days).

Average snowfall in December
Coatsburg, IL

Average snowfall in December - Coatsburg, IL
  • Average snowfall in December: 1.46"

The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Coatsburg, IL

Average snowfall days in December - Coatsburg, IL
  • Average snowfall days in December: 5.5 days

The month with the highest number of snowfall days is January (8.8 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
Coatsburg, IL

Average daylight in December / Average sunshine in December - Coatsburg, 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 24min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

Average sunshine days in December
Coatsburg, IL

Average sunshine days in December - Coatsburg, IL
  • Average sunshine days in December: 19.6 days

The month with the most sunshine days is December (19.6 days).
The month with the least sunshine days is June (11.1 days).

Average UV index in December
Coatsburg, IL

Average UV index in December - Coatsburg, 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
Coatsburg, IL

Average cloud cover in December - Coatsburg, IL
  • Average cloud cover in December: 49

The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in December
Coatsburg, IL

Average visibility in December - Coatsburg, IL
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Coatsburg, Illinois, USA

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