December weather forecast
Shetlerville, IL

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Weather in December

The first month of the winter, December, is also a frosty month in Shetlerville, Illinois, with an average temperature varying between 33.4°F (0.8°C) and 45.5°F (7.5°C).

Temperature

Stepping into December, Shetlerville observes a temperature decline, with the average high falling from November's cool 54.5°F (12.5°C) to a chilly 45.5°F (7.5°C). An average low-temperature of 33.4°F (0.8°C) is recorded in the month of December.

Humidity

The average relative humidity in December is 78%.

Rainfall

In December, in Shetlerville, Illinois, the rain falls for 10.8 days. Throughout December, 2.05" (52mm) of precipitation is accumulated. Throughout the year, in Shetlerville, there are 148.8 rainfall days, and 27.05" (687mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In December, in Shetlerville, it is snowing for 3.2 days. Throughout December, 0.51" (13mm) of snow is accumulated. In Shetlerville, during the entire year, snow falls for 15 days and aggregates up to 4.8" (122mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 36min of daylight.
On the first day of the month, sunrise is at 6:49 am and sunset at 4:35 pm. On the last day of December, in Shetlerville, sunrise is at 7:07 am and sunset at 4:46 pm CST.

Sunshine

The average sunshine in December is 4.8h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A daily high UV index of 2 in December leads to these guidelines:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
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Frequently asked questions

What is the usual temperature for Shetlerville in December?

The average high-temperature and low-temperature during December are 45.5°F (7.5°C) and 33.4°F (0.8°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is estimated at 95°F (35°C).

What is the average humidity in December in Shetlerville?

The average relative humidity in December in Shetlerville, Illinois, is 78%.

How much does it rain in Shetlerville in December?

In December, in Shetlerville, the rain falls for 10.8 days. Throughout December, 2.05" (52mm) of precipitation is accumulated.

How many days does it snow in December in Shetlerville?

In Shetlerville, during December, snow falls for 3.2 days and regularly aggregates up to 0.51" (13mm) of snow.

What is the month with the shortest days in Shetlerville?

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

How many hours of daylight does Shetlerville have in December?

The average day length in December is 9h and 38min.

What time are sunrise and sunset in December in Shetlerville?

In December, on the first day of the month, sunrise is at 6:49 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 4:46 pm CST.

How many hours of sunshine does Shetlerville have in December?

In Shetlerville, the average sunshine duration in December is 4.8h.

What is the month with the lowest UV index in Shetlerville?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Shetlerville, Illinois.

What is the UV index reading in December in Shetlerville?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from 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
Shetlerville, IL

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

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (40.5°F).

  • Average low temperature in December: 33.4°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).

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Average pressure in December
Shetlerville, IL

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

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in December
Shetlerville, IL

Average wind speed in December - Shetlerville, IL
  • Average wind speed in December: 8.8mph

The windiest month (with the highest average wind speed) is February (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity in December
Shetlerville, IL

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

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in December
Shetlerville, IL

Average rainfall in December - Shetlerville, IL
  • Average rainfall in December: 2.05"

The wettest month (with the highest rainfall) is February (3.03").
The driest month (with the least rainfall) is September (1.3").

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Average rainfall days in December
Shetlerville, IL

Average rainfall days in December - Shetlerville, IL
  • Average rainfall days in December: 10.8 days

The months with the highest number of rainy days are May and July (16.3 days).
The month with the least rainy days is November (8.8 days).

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Average snowfall in December
Shetlerville, IL

Average snowfall in December - Shetlerville, IL
  • Average snowfall in December: 0.51"

The month with the highest snowfall is February (1.57").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Shetlerville, IL

Average snowfall days in December - Shetlerville, IL
  • Average snowfall days in December: 3.2 days

The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Shetlerville, 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 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Shetlerville, IL

Average sunshine days in December - Shetlerville, IL
  • Average sunshine days in December: 18.2 days

The month with the most sunshine days is October (20.3 days).
The month with the least sunshine days is July (12.1 days).

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Average UV index in December
Shetlerville, IL

Average UV index in December - Shetlerville, 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).

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Average cloud cover in December
Shetlerville, IL

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

The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are June, August and September (Cloud cover 28).

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Average visibility in December
Shetlerville, IL

Average visibility in December - Shetlerville, 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).

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Shetlerville, Illinois, USA

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