December weather forecast
Grape Creek, IL

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Weather in December

The first month of the winter, December, is still a cold month in Grape Creek, Illinois, with temperature in the range of an average low of 27.5°F (-2.5°C) and an average high of 37.6°F (3.1°C).

Temperature

The commencement of December indicates a shift in the average high-temperature, receding from November's frosty 48.9°F (9.4°C) to a cold 37.6°F (3.1°C). Grape Creek, during the month of December, experiences an average low-temperature of 27.5°F (-2.5°C).

Humidity

In December, the average relative humidity in Grape Creek, Illinois, is 81%.

Rainfall

In December, the rain falls for 8.8 days. Throughout December, 1.46" (37mm) of precipitation is accumulated. Throughout the year, there are 151.8 rainfall days, and 25.63" (651mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Grape Creek, Illinois, in December, snow falls for 7.9 days, with typically accumulated 2.09" (53mm) of snow. Throughout the year, there are 35.2 snowfall days, and 8.82" (224mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:54 am and sunset at 4:25 pm. On the last day of December, in Grape Creek, sunrise is at 7:12 am and sunset at 4:35 pm CST.

Sunshine

The average sunshine in December is 4.5h.

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 exposure to the Sun's UV radiation for average individuals.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Updated: Aug 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?

The average high-temperature, in December, in Grape Creek, is 37.6°F (3.1°C), while the average low-temperature is 27.5°F (-2.5°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in August is appraised at 86°F (30°C).

What is the average humidity in December?

In Grape Creek, the average relative humidity in December is 81%.

How many days does it rain in December?

In Grape Creek, in December, during 8.8 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Grape Creek, in December, during 7.9 snowfall days, 2.09" (53mm) of snow is typically 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 Grape Creek have in December?

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

When are sunrise and sunset in December?

On the first day of December, sunrise is at 6:54 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:35 pm CST.

How many hours of sunshine does Grape Creek have in December?

In December, the average sunshine duration is 4.5h.

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 December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health 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
Grape Creek, IL

Average temperature in December - Grape Creek, IL
  • Average high temperature in December: 37.6°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.6°F).

  • Average low temperature in December: 27.5°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

Average pressure in December
Grape Creek, IL

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Grape Creek, IL

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

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity in December
Grape Creek, IL

Average humidity in December - Grape Creek, IL
  • Average humidity in December: 81%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).

Average rainfall in December
Grape Creek, IL

Average rainfall in December - Grape Creek, IL
  • Average rainfall in December: 1.46"

The wettest month (with the highest rainfall) is April (3.23").
The driest months (with the least rainfall) are February and September (1.38").

Average rainfall days in December
Grape Creek, IL

Average rainfall days in December - Grape Creek, IL
  • Average rainfall days in December: 8.8 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (6.6 days).

Average snowfall in December
Grape Creek, IL

Average snowfall in December - Grape Creek, IL
  • Average snowfall in December: 2.09"

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
Grape Creek, IL

Average snowfall days in December - Grape Creek, IL
  • Average snowfall days in December: 7.9 days

The month with the highest number of snowfall days is January (10.6 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
Grape Creek, IL

Average daylight in December / Average sunshine in December - Grape Creek, 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 3min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days in December
Grape Creek, IL

Average sunshine days in December - Grape Creek, IL
  • Average sunshine days in December: 15.6 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (9.5 days).

Average UV index in December
Grape Creek, IL

Average UV index in December - Grape Creek, 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
Grape Creek, IL

Average cloud cover in December - Grape Creek, IL
  • Average cloud cover in December: 54

The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are June, August and September (Cloud cover 32).

Average visibility in December
Grape Creek, IL

Average visibility in December - Grape Creek, IL
  • Average visibility in December: 6mi

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

Grape Creek, Illinois, USA

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