December weather forecast
Nilwood, IL

December

Weather in December

December, the first month of the winter in Nilwood, is still a cold month, with an average temperature fluctuating between 4.3°C and -1.9°C.

Temperature

December's arrival corresponds with a decrease in average high-temperatures, from November's fresh 10.5°C to an icy 4.3°C. The temperature lowers to an average of -1.9°C during December nights.

Humidity

The average relative humidity in December is 78%.

Rainfall

The month with the least rainfall is December, when the rain falls for 8.5 days and typically collects 44mm of precipitation.

Snowfall

Months with snowfall are January through April, November and December. In Nilwood, in December, snow falls for 4.9 days, with typically accumulated 43mm of snow. Throughout the year, there are 25.5 snowfall days, and 231mm of snow is accumulated.

Daylight

December has the shortest days of the year in Nilwood, with an average of 9h and 24min of daylight.
On the first day of December, sunrise is at 7:00 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:45 pm CST.

Sunshine

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

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 of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.

Frequently asked questions

How cold is it in December?
An average high-temperature, in December, in Nilwood, is 4.3°C and the average low-temperature is -1.9°C. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, in August is calculated to be 32°C.
What is the average humidity in December?
The average relative humidity in December is 78%.
What is the driest month?
The month with the least rainfall is December, when the rain falls for 8.5 days and typically collects 44mm of precipitation.
How many days does it rain in December?
In December, the rain falls for 8.5 days. Throughout December, 44mm of precipitation is accumulated.
How much does it snow in December?
In December, in Nilwood, it is snowing for 4.9 days. Throughout December, 43mm of snow is accumulated.
What is the month with the shortest days?
With an average of 9h and 24min of daylight, December has the shortest days of the year.
How many hours of daylight does Nilwood have in December?
The average day length in December is 9h and 27min.
When is the sunrise / sunset in December?
On the first day of December, sunrise is at 7:00 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:45 pm CST.
How long on average sun shines in December?
The average sunshine duration in December is 4.8h.
When is the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
How high is the UV index in December?
In Nilwood, Illinois, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in December - Nilwood, IL
Average temperature in December
Nilwood, IL
  • Average high temperature in December: 4.3°C

The warmest month (with the highest average high temperature) is July (28.5°C).
The month with the lowest average high temperature is January (1.2°C).

  • Average low temperature in December: -1.9°C

The month with the highest average low temperature is July (19.3°C).
The coldest month (with the lowest average low temperature) is January (-5.4°C).

Average pressure in December - Nilwood, IL
Average pressure in December
Nilwood, IL
  • Average pressure in December: 1020.3mbar

The month with the highest atmospheric pressure is January (1021.1mbar).
The month with the lowest atmospheric pressure is June (1013.1mbar).

Average wind speed in December - Nilwood, IL
Average wind speed in December
Nilwood, IL
  • Average wind speed in December: 15.4km/h

The windiest month (with the highest average wind speed) is January (16.5km/h).
The calmest month (with the lowest average wind speed) is July (9.6km/h).

Average humidity in December - Nilwood, IL
Average humidity in December
Nilwood, 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 - Nilwood, IL
Average rainfall in December
Nilwood, IL
  • Average rainfall in December: 44mm

The wettest month (with the highest rainfall) is June (98mm).
The driest month (with the least rainfall) is December (44mm).

Average rainfall days in December - Nilwood, IL
Average rainfall days in December
Nilwood, IL
  • Average rainfall days in December: 8.5 days

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

Average snowfall in December - Nilwood, IL
Average snowfall in December
Nilwood, IL
  • Average snowfall in December: 43mm

The month with the highest snowfall is February (81mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in December - Nilwood, IL
Average snowfall days in December
Nilwood, IL
  • Average snowfall days in December: 4.9 days

The month with the highest number of snowfall days is January (8.5 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 - Nilwood, IL
Average daylight in December /
Average sunshine in December
Nilwood, IL
  • Average daylight in December: 9h and 2min

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 24min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

Average sunshine days in December - Nilwood, IL
Average sunshine days in December
Nilwood, IL
  • Average sunshine days in December: 17.9 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (10.6 days).

Average UV index in December - Nilwood, IL
Average UV index in December
Nilwood, 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 - Nilwood, IL
Average cloud cover in December
Nilwood, 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, August and September (Cloud cover 30).

Average visibility in December - Nilwood, IL
Average visibility in December
Nilwood, IL
  • Average visibility in December: 9km

The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (9km).
The months with the lowest visibility are July and August (8km).

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