December weather forecast
Ursa, IL

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Weather in December

The first month of the winter, December, is still a cold month in Ursa, Illinois, with an average temperature varying between 38.7°F (3.7°C) and 26.6°F (-3°C).

Temperature

Ursa's progression into December includes a drop in the average high-temperature, from a cool 50.4°F (10.2°C) in November to an icy 38.7°F (3.7°C). December nights cool down to an average low-temperature of 26.6°F (-3°C).

Humidity

In Ursa, the average relative humidity in December is 77%.

Rainfall

In Ursa, Illinois, in December, it is raining for 6.5 days, with typically 1.42" (36mm) of accumulated precipitation. Throughout the year, there are 137.5 rainfall days, and 27.68" (703mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In Ursa, during December, snow falls for 5.3 days and regularly aggregates up to 2.05" (52mm) of snow. In Ursa, during the entire year, snow falls for 28.4 days and aggregates up to 12.44" (316mm) of snow.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:08 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:50 pm CST.

Sunshine

In December, the average sunshine is 4.9h.

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 unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 2 in December translates into these instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.

Frequently asked questions

How cold is December?

December temperatures vary between a high-temperature of 38.7°F (3.7°C) and a low-temperature of 26.6°F (-3°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in August is evaluated at 91.4°F (33°C).

What is the average humidity in December in Ursa?

In December, the average relative humidity is 77%.

How many days does it rain in December?

In Ursa, during December, the rain falls for 6.5 days and regularly aggregates up to 1.42" (36mm) of precipitation.

How many days does it snow in December?

In Ursa, in December, snow falls for 5.3 days, with typically accumulated 2.05" (52mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

What is the average length of the day in December?

In December, the average day length is 9h and 23min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:08 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:50 pm CST.

How many hours of sunshine does Ursa have in December?

The average sunshine duration in December is 4.9h.

When is the lowest UV index?

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

How high is the UV index in December in Ursa?

In December, the average daily maximum UV index in Ursa 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
Ursa, IL

Average temperature in December - Ursa, IL
  • Average high temperature in December: 38.7°F

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in December: 26.6°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 (20.1°F).

Average pressure in December
Ursa, IL

Average pressure in December - Ursa, IL
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
Ursa, IL

Average wind speed in December - Ursa, IL
  • Average wind speed in December: 9.7mph

The windiest months (with the highest average wind speed) are January and February (10.2mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

Average humidity in December
Ursa, IL

Average humidity in December - Ursa, IL
  • Average humidity in December: 77%

The months with the highest relative humidity are May, June and July (80%).
The month with the lowest relative humidity is October (70%).

Average rainfall in December
Ursa, IL

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

The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is January (1.26").

Average rainfall days in December
Ursa, IL

Average rainfall days in December - Ursa, IL
  • Average rainfall days in December: 6.5 days

The months with the highest number of rainy days are May and June (17.3 days).
The month with the least rainy days is January (5.3 days).

Average snowfall in December
Ursa, IL

Average snowfall in December - Ursa, IL
  • Average snowfall in December: 2.05"

The month with the highest snowfall is January (4.21").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Ursa, IL

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

The month with the highest number of snowfall days is January (9.3 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
Ursa, IL

Average daylight in December / Average sunshine in December - Ursa, IL
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
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 July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

Average sunshine days in December
Ursa, IL

Average sunshine days in December - Ursa, IL
  • Average sunshine days in December: 19.5 days

The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is June (10.1 days).

Average UV index in December
Ursa, IL

Average UV index in December - Ursa, 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
Ursa, IL

Average cloud cover in December - Ursa, IL
  • Average cloud cover in December: 48

The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in December
Ursa, IL

Average visibility in December - Ursa, 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).

Ursa, Illinois, USA

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