December weather forecast
Anchor, IL

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Weather in December

December, the first month of the winter in Anchor, is also an icy month, with an average temperature fluctuating between 36.5°F (2.5°C) and 27°F (-2.8°C).

Temperature

December brings a decrease in the average high-temperature, shifting from a frosty 47.8°F (8.8°C) in November to an icy 36.5°F (2.5°C). During December, Anchor records an average temperature of 27°F (-2.8°C) at night.

Humidity

In December, the average relative humidity is 80%.

Rainfall

February and December are months with the least rain when the rain falls for 6.1 days and typically aggregates up to 0.75" (19mm) of rain.

Snowfall

January through April, October through December are months with snowfall. In December, it is snowing for 6.5 days. Throughout December, 0.83" (21mm) of snow is accumulated. Throughout the year, there are 29.4 snowfall days, and 4.69" (119mm) of snow is accumulated.

Daylight

The month with the shortest days in Anchor is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 6:59 am and sunset at 4:27 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:37 pm CST.

Sunshine

The average sunshine in December is 4.2h.

UV index

The month with the lowest UV index in Anchor is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A daily high UV index of 1 in December leads to these guidelines:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Updated: Aug 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

Anchor in December has an average high-temperature of 36.5°F (2.5°C) and an average low-temperature of 27°F (-2.8°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in July is estimated at 86°F (30°C).

What is the average humidity in December?

In Anchor, the average relative humidity in December is 80%.

What is the driest month?

February and December are months with the least rain when the rain falls for 6.1 days and typically aggregates up to 0.75" (19mm) of rain.

How many days does it rain in December?

In December, the rain falls for 6.1 days. Throughout December, 0.75" (19mm) of precipitation is accumulated.

How many days does it snow in December?

In Anchor, Illinois, in December, snow falls for 6.5 days, with typically accumulated 0.83" (21mm) of snow.

What is the month with the shortest days?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

How many hours of daylight does Anchor have in December?

The average day length in December is 9h and 20min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 6:59 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:37 pm CST.

How long on average sun shines in December in Anchor?

The average sunshine duration in December is 4.2h.

When is the lowest UV index?

The month with the lowest UV index in Anchor is December, with an average maximum UV index of 1.

How high is the UV index in December?

The average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a minimal hazard to health 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
Anchor, IL

Average temperature in December - Anchor, IL
  • Average high temperature in December: 36.5°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in December: 27°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).

Average pressure in December
Anchor, IL

Average pressure in December - Anchor, IL
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Anchor, IL

Average wind speed in December - Anchor, IL
  • Average wind speed in December: 10.4mph

The windiest month (with the highest average wind speed) is January (11mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in December
Anchor, IL

Average humidity in December - Anchor, IL
  • Average humidity in December: 80%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Anchor, IL

Average rainfall in December - Anchor, IL
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is May (1.93").
The driest months (with the least rainfall) are February and December (0.75").

Average rainfall days in December
Anchor, IL

Average rainfall days in December - Anchor, IL
  • Average rainfall days in December: 6.1 days

The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (4.8 days).

Average snowfall in December
Anchor, IL

Average snowfall in December - Anchor, IL
  • Average snowfall in December: 0.83"

The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Anchor, IL

Average snowfall days in December - Anchor, IL
  • Average snowfall days in December: 6.5 days

The month with the highest number of snowfall days is January (9.3 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
Anchor, IL

Average daylight in December / Average sunshine in December - Anchor, 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 1min

The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in December
Anchor, IL

Average sunshine days in December - Anchor, IL
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (10.3 days).

Average UV index in December
Anchor, IL

Average UV index in December - Anchor, IL
  • Average UV index in December: 1

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Anchor, IL

Average cloud cover in December - Anchor, IL
  • Average cloud cover in December: 56

The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 33).

Average visibility in December
Anchor, IL

Average visibility in December - Anchor, 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).

Anchor, Illinois, USA

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