December weather forecast
Witt, IL

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Weather in December

The first month of the winter, December, is also an icy month in Witt, Illinois, with an average temperature varying between 40.1°F (4.5°C) and 28.8°F (-1.8°C).

Temperature

A shift in Witt's weather is observed as November turns into December, with the average high temperature reducing from a fresh 51.3°F (10.7°C) to a wintry 40.1°F (4.5°C). In the month of December, Witt records a consistent average low-temperature of 28.8°F (-1.8°C).

Humidity

In Witt, the average relative humidity in December is 78%.

Rainfall

In Witt, in December, during 7.6 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, there are 145.5 rainfall days, and 27.44" (697mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In December, it is snowing for 5.3 days. Throughout December, 1.85" (47mm) of snow is accumulated. In Witt, during the entire year, snow falls for 23.9 days and aggregates up to 8.58" (218mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 6:58 am and sunset at 4:34 pm. On the last day of December, in Witt, sunrise is at 7:16 am and sunset at 4:44 pm CST.

Sunshine

In Witt, the average sunshine in December is 4.8h.

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 estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 2 during December translates into these guidelines:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. To protect against the Sun's most potent rays, avoid direct exposure around midday. Stay sun-safe with clothing that is both closely woven and worn loosely. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Updated: Jul 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

During December, Witt experiences an average high-temperature of 40.1°F (4.5°C) and a low-temperature of 28.8°F (-1.8°C). The average heat index (a.k.a. 'real feel', 'feels like'), 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 Witt?

In December, the average relative humidity is 78%.

How much does it rain in December?

In Witt, in December, it is raining for 7.6 days, with typically 1.61" (41mm) of accumulated precipitation.

How much does it snow in December?

In Witt, in December, during 5.3 snowfall days, 1.85" (47mm) of snow is typically accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

How many hours of daylight does Witt have in December?

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

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 6:58 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:44 pm CST.

How long on average sun shines in December?

The average sunshine duration in December in Witt is 4.8h.

What is the month 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 Witt?

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

Average temperature in December - Witt, IL
  • Average high temperature in December: 40.1°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (34.7°F).

  • Average low temperature in December: 28.8°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

Average pressure in December
Witt, IL

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Witt, IL

Average wind speed in December - Witt, IL
  • Average wind speed in December: 9.6mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in December
Witt, IL

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

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

Average rainfall in December
Witt, IL

Average rainfall in December - Witt, IL
  • Average rainfall in December: 1.61"

The wettest month (with the highest rainfall) is June (3.5").
The driest month (with the least rainfall) is February (1.5").

Average rainfall days in December
Witt, IL

Average rainfall days in December - Witt, IL
  • Average rainfall days in December: 7.6 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (7.4 days).

Average snowfall in December
Witt, IL

Average snowfall in December - Witt, IL
  • Average snowfall in December: 1.85"

The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Witt, IL

Average snowfall days in December - Witt, IL
  • Average snowfall days in December: 5.3 days

The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Witt, 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 5min

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 24min).

Average sunshine days in December
Witt, IL

Average sunshine days in December - Witt, IL
  • Average sunshine days in December: 18.7 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (11.1 days).

Average UV index in December
Witt, IL

Average UV index in December - Witt, 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
Witt, IL

Average cloud cover in December - Witt, IL
  • Average cloud cover in December: 50

The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June, July and September (Cloud cover 29).

Average visibility in December
Witt, IL

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

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

Witt, Illinois, USA

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