December weather forecast
Shumway, IL

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Weather in December

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

Temperature

The arrival of December corresponds with a shift in temperature, down from a fresh 51.1°F (10.6°C) in November to a cold 40.3°F (4.6°C). Shumway temperatures generally rest at a low of 29.1°F (-1.6°C) during the December nights.

Humidity

In December, the average relative humidity is 79%.

Rainfall

In Shumway, during December, the rain falls for 8.6 days and regularly aggregates up to 1.42" (36mm) of precipitation. Throughout the year, there are 135.9 rainfall days, and 21.89" (556mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Shumway, in December, during 3.5 snowfall days, 1.14" (29mm) of snow is typically accumulated. In Shumway, 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 30min of daylight, December has the shortest days of the year.
On the first day of December, 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

The average sunshine in December is 4.6h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, a regular UV index of 2 translates into these guidelines:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.

Frequently asked questions

How cold does it get in December?

During December, Shumway experiences an average high-temperature of 40.3°F (4.6°C) and a low-temperature of 29.1°F (-1.6°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, is computed to be 89.6°F (32°C).

What is the average humidity in December?

In Shumway, the average relative humidity in December is 79%.

How much does it rain in December?

In Shumway, in December, during 8.6 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.

How much does it snow in December?

In Shumway, Illinois, in December, during 3.5 snowfall days, 1.14" (29mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 30min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

The average day length in December is 9h and 28min.

When is the sunrise / sunset in December?

On the first day of December, 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 Shumway?

The average sunshine duration in December is 4.6h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

In December, the average daily maximum UV index in Shumway is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's 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
Shumway, IL

Average temperature in December - Shumway, 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).

Average pressure in December
Shumway, IL

Average pressure in December - Shumway, 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).

Average wind speed in December
Shumway, IL

Average wind speed in December - Shumway, 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).

Average humidity in December
Shumway, IL

Average humidity in December - Shumway, 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%).

Average rainfall in December
Shumway, IL

Average rainfall in December - Shumway, 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").

Average rainfall days in December
Shumway, IL

Average rainfall days in December - Shumway, 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).

Average snowfall in December
Shumway, IL

Average snowfall in December - Shumway, 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").

Average snowfall days in December
Shumway, IL

Average snowfall days in December - Shumway, 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).

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

Average daylight in December / Average sunshine in December - Shumway, IL
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 4h and 4min

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).

Average sunshine days in December
Shumway, IL

Average sunshine days in December - Shumway, 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).

Average UV index in December
Shumway, IL

Average UV index in December - Shumway, 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).

Average cloud cover in December
Shumway, IL

Average cloud cover in December - Shumway, 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).

Average visibility in December
Shumway, IL

Average visibility in December - Shumway, 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).

Shumway, Illinois, USA

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