December weather forecast
Big Bay, IL

Share

Weather in December

December, the first month of the winter in Big Bay, is also a frosty month, with an average temperature ranging between max 45.5°F (7.5°C) and min 33.3°F (0.7°C).

Temperature

December suggests a modest reduction in the average high-temperature, shifting from a fresh 54.9°F (12.7°C) in November to a chilly 45.5°F (7.5°C). An average low-temperature of 33.3°F (0.7°C) is anticipated throughout the nights during December.

Humidity

The average relative humidity in December is 78%.

Rainfall

In Big Bay, during December, the rain falls for 11.5 days and regularly aggregates up to 3.03" (77mm) of precipitation. In Big Bay, Illinois, during the entire year, the rain falls for 160.7 days and collects up to 36.73" (933mm) of precipitation.

Snowfall

Months with snowfall in Big Bay are January through April, November and December. In December, in Big Bay, it is snowing for 2 days. Throughout December, 0.47" (12mm) of snow is accumulated. In Big Bay, Illinois, during the entire year, snow falls for 12.9 days and aggregates up to 4.33" (110mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 36min of daylight.
On the first day of the month, sunrise is at 6:50 am and sunset at 4:37 pm. On the last day of December, sunrise is at 7:08 am and sunset at 4:47 pm CST.

Sunshine

In December, the average sunshine is 4.9h.

UV index

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.

Frequently asked questions

What is the usual temperature for Big Bay in December?

In Big Bay, in December, the average high-temperature is 45.5°F (7.5°C), and the average low-temperature is 33.3°F (0.7°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is appraised at 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December in Big Bay is 78%.

How much does it rain in December?

In December, the rain falls for 11.5 days. Throughout December, 3.03" (77mm) of precipitation is accumulated.

How many days does it snow in December?

In Big Bay, during December, snow falls for 2 days and regularly aggregates up to 0.47" (12mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 36min of daylight.

What is the average length of the day in December?

In December, the average day length is 9h and 38min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 6:50 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 4:47 pm CST.

How long on average sun shines in December?

The average sunshine duration in December is 4.9h.

What are the months with the lowest UV index?

The months with the lowest UV index are January, February 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 reading 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
Big Bay, IL

Average temperature in December - Big Bay, IL
  • Average high temperature in December: 45.5°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (41.4°F).

  • Average low temperature in December: 33.3°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (28°F).

Average pressure in December
Big Bay, IL

Average pressure in December - Big Bay, IL
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Big Bay, IL

Average wind speed in December - Big Bay, IL
  • Average wind speed in December: 8.3mph

The windiest months (with the highest average wind speed) are January, March and April (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).

Average humidity in December
Big Bay, IL

Average humidity in December - Big Bay, IL
  • Average humidity in December: 78%

The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (70%).

Average rainfall in December
Big Bay, IL

Average rainfall in December - Big Bay, IL
  • Average rainfall in December: 3.03"

The wettest month (with the highest rainfall) is April (4.29").
The driest month (with the least rainfall) is September (1.5").

Average rainfall days in December
Big Bay, IL

Average rainfall days in December - Big Bay, IL
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is October (10.2 days).

Average snowfall in December
Big Bay, IL

Average snowfall in December - Big Bay, IL
  • Average snowfall in December: 0.47"

The month with the highest snowfall is February (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Big Bay, IL

Average snowfall days in December - Big Bay, IL
  • Average snowfall days in December: 2 days

The month with the highest number of snowfall days is January (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Big Bay, IL

Average daylight in December / Average sunshine in December - Big Bay, IL
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 4h and 5min

The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

Average sunshine days in December
Big Bay, IL

Average sunshine days in December - Big Bay, IL
  • Average sunshine days in December: 17.7 days

The month with the most sunshine days is October (19.3 days).
The month with the least sunshine days is May (11 days).

Average UV index in December
Big Bay, IL

Average UV index in December - Big Bay, IL
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in December
Big Bay, IL

Average cloud cover in December - Big Bay, IL
  • Average cloud cover in December: 48

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is September (Cloud cover 26).

Average visibility in December
Big Bay, IL

Average visibility in December - Big Bay, 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).

Big Bay, Illinois, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location