December weather forecast
Barrington, IL

Weather in December

December, the first month of the winter in Barrington, is also a wintry month, with an average temperature varying between 23.9°F (-4.5°C) and 33.4°F (0.8°C).

Temperature

In Barrington, the average high-temperature in December decreases from a frosty 45.1°F (7.3°C) in November to a wintry 33.4°F (0.8°C). In Barrington, Illinois, in December, the average low-temperature is 23.9°F (-4.5°C).

Humidity

In December, the average relative humidity in Barrington is 81%.

Rainfall

In Barrington, during December, the rain falls for 8.8 days and regularly aggregates up to 1.65" (42mm) of precipitation. In Barrington, during the entire year, the rain falls for 163.1 days and collects up to 32.24" (819mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Barrington, Illinois, during December, snow falls for 11.7 days and regularly aggregates up to 3.46" (88mm) of snow. Throughout the year, in Barrington, Illinois, there are 55.5 snowfall days, and 22.95" (583mm) of snow is accumulated.

Daylight

With an average of 9h and 10min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:01 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:20 am and sunset at 4:30 pm CST.

Sunshine

The average sunshine in December in Barrington is 4h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Barrington, Illinois. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in December in Barrington?

The average relative humidity in December in Barrington is 81%.

How many days does it rain in December in Barrington?

In Barrington, in December, it is raining for 8.8 days, with typically 1.65" (42mm) of accumulated precipitation.

How much does it snow in Barrington in December?

In Barrington, during December, snow falls for 11.7 days and regularly aggregates up to 3.46" (88mm) of snow.

What is the month with the shortest days in Barrington?

With an average of 9h and 10min of daylight, December has the shortest days of the year in Barrington, Illinois.

What is the average length of the day in December in Barrington?

In December, the average day length is 9h and 10min.

When are sunrise and sunset in December in Barrington?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:21 pm. On the last day of the month, in Barrington, sunrise is at 7:20 am and sunset at 4:30 pm CST.

How many hours of sunshine does Barrington have in December?

In December, the average sunshine duration in Barrington is 4h.

When is the lowest UV index in Barrington?

January and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index intensity in December in Barrington?

In Barrington, Illinois, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.
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
Barrington, IL

Average temperature in December - Barrington, IL
  • Average high temperature in December: 33.4°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (27.7°F).

  • Average low temperature in December: 23.9°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).

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Average pressure in December
Barrington, IL

Average pressure in December - Barrington, IL
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in December
Barrington, IL

Average wind speed in December - Barrington, IL
  • Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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Average humidity in December
Barrington, IL

Average humidity in December - Barrington, IL
  • Average humidity in December: 81%

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).

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Average rainfall in December
Barrington, IL

Average rainfall in December - Barrington, IL
  • Average rainfall in December: 1.65"

The wettest month (with the highest rainfall) is June (4.13").
The driest month (with the least rainfall) is November (1.61").

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Average rainfall days in December
Barrington, IL

Average rainfall days in December - Barrington, IL
  • Average rainfall days in December: 8.8 days

The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is February (5.7 days).

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Average snowfall in December
Barrington, IL

Average snowfall in December - Barrington, IL
  • Average snowfall in December: 3.46"

The month with the highest snowfall is February (6.22").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Barrington, IL

Average snowfall days in December - Barrington, IL
  • Average snowfall days in December: 11.7 days

The month with the highest number of snowfall days is January (15.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Barrington, IL

Average daylight in December / Average sunshine in December - Barrington, IL
  • Average daylight in December: 9h and 10min

The month with the longest days is June (Average daylight: 15h and 13min).
The month with the shortest days is December (Average daylight: 9h and 10min).

  • Average sunshine in December: 4h and 0min

The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in December
Barrington, IL

Average sunshine days in December - Barrington, IL
  • Average sunshine days in December: 13.9 days

The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is June (8.4 days).

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Average UV index in December
Barrington, IL

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

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in December
Barrington, IL

Average cloud cover in December - Barrington, IL
  • Average cloud cover in December: 58

The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July, August and September (Cloud cover 31).

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Average visibility in December
Barrington, IL

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

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).

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