December weather forecast
Stewardson, IL

Weather in December

The first month of the winter, December, is also a wintry month in Stewardson, Illinois, with an average temperature fluctuating between 40.3°F (4.6°C) and 29.1°F (-1.6°C).

Temperature

In Stewardson, the average high-temperature in December decreases from a cool 51.1°F (10.6°C) in November to a cold 40.3°F (4.6°C). In Stewardson, the average low-temperature is 29.1°F (-1.6°C).

Humidity

The average relative humidity in December is 79%.

Rainfall

In Stewardson, it is raining for 8.6 days, with typically 1.42" (36mm) of accumulated precipitation. In Stewardson, during the entire year, the rain falls for 135.9 days and collects up to 21.89" (556mm) of precipitation.

Snowfall

Months with snowfall in Stewardson are January through April, November and December. In Stewardson, during December, snow falls for 3.5 days and regularly aggregates up to 1.14" (29mm) of snow. In Stewardson, Illinois, during the entire year, snow falls for 17.7 days and aggregates up to 4.17" (106mm) of snow.

Daylight

With an average of 9h and 28min of daylight, December has the shortest days of the year in Stewardson.
On the first day of December in Stewardson, sunrise is at 6:55 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:41 pm CST.

Sunshine

In Stewardson, the average sunshine in December is 4.6h.

UV index

January, February, November 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 low threat to health from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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 temperature in December in Stewardson?

In December, the average high-temperature is 40.3°F (4.6°C), and the average low-temperature is 29.1°F (-1.6°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in August is calculated to be 89.6°F (32°C).

What is the average humidity in December in Stewardson?

In December, the average relative humidity is 79%.

How many days does it rain in December in Stewardson?

In Stewardson, during December, the rain falls for 8.6 days and regularly aggregates up to 1.42" (36mm) of precipitation.

How much does it snow in Stewardson in December?

In Stewardson, Illinois, during December, snow falls for 3.5 days and regularly aggregates up to 1.14" (29mm) of snow.

What is the month with the shortest days in Stewardson?

The month with the shortest days is December, with an average of 9h and 28min of daylight.

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

In Stewardson, the average day length in December is 9h and 28min.

When are sunrise and sunset in December in Stewardson?

On the first day of December in Stewardson, Illinois, sunrise is at 6:55 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:41 pm CST.

How long on average sun shines in December in Stewardson?

In Stewardson, Illinois, the average sunshine duration in December is 4.6h.

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

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

How high is the UV index in December in Stewardson?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health threat 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
Stewardson, IL

Average temperature in December - Stewardson, IL
  • Average high temperature in December: 40.3°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in December: 29.1°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 (23°F).

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Average pressure in December
Stewardson, IL

Average pressure in December - Stewardson, IL
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Stewardson, IL

Average wind speed in December - Stewardson, IL
  • Average wind speed in December: 9.5mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6mph).

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Average humidity in December
Stewardson, IL

Average humidity in December - Stewardson, IL
  • Average humidity in December: 79%

The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in December
Stewardson, IL

Average rainfall in December - Stewardson, IL
  • Average rainfall in December: 1.42"

The wettest month (with the highest rainfall) is April (2.83").
The driest month (with the least rainfall) is February (1.06").

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Average rainfall days in December
Stewardson, IL

Average rainfall days in December - Stewardson, IL
  • Average rainfall days in December: 8.6 days

The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (6.9 days).

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Average snowfall in December
Stewardson, IL

Average snowfall in December - Stewardson, IL
  • Average snowfall in December: 1.14"

The month with the highest snowfall is January (1.18").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Stewardson, IL

Average snowfall days in December - Stewardson, IL
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Stewardson, IL
  • Average daylight in December: 9h and 28min

The month with the longest days is June (Average daylight: 14h and 53min).
The month with the shortest days is December (Average daylight: 9h and 28min).

  • Average sunshine in December: 4h and 36min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

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Average sunshine days in December
Stewardson, IL

Average sunshine days in December - Stewardson, IL
  • Average sunshine days in December: 19.1 days

The month with the most sunshine days is January (20 days).
The month with the least sunshine days is May (12.9 days).

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Average UV index in December
Stewardson, IL

Average UV index in December - Stewardson, 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).

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Average cloud cover in December
Stewardson, IL

Average cloud cover in December - Stewardson, IL
  • Average cloud cover in December: 51

The months with the most cloud cover are January and February (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).

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Average visibility in December
Stewardson, IL

Average visibility in December - Stewardson, 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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