December weather forecast
Spring Grove, IL

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Weather in December

December, the first month of the winter in Spring Grove, is also a wintry month, with an average temperature fluctuating between 22.8°F (-5.1°C) and 32.5°F (0.3°C).

Temperature

With December's onset, the average high-temperature recedes from November's frosty 44.4°F (6.9°C) to a wintry 32.5°F (0.3°C). Spring Grove anticipates an average minimum temperature of 22.8°F (-5.1°C) in the month of December.

Humidity

The average relative humidity in December in Spring Grove is 82%.

Rainfall

December is the month with the least rainfall in Spring Grove, Illinois. Rain falls for 6 days and accumulates 1.06" (27mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Spring Grove. In December, in Spring Grove, it is snowing for 7.8 days. Throughout December, 2.28" (58mm) of snow is accumulated. In Spring Grove, during the entire year, snow falls for 38.2 days and aggregates up to 15.59" (396mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:03 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:30 pm CST.

Sunshine

The average sunshine in December in Spring Grove is 3.9h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Spring Grove. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In December, a daily UV index of 1 turns into the following recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in Spring Grove?

During December, Spring Grove experiences an average high-temperature of 32.5°F (0.3°C) and a low-temperature of 22.8°F (-5.1°C).

What is the average humidity in December in Spring Grove?

In Spring Grove, Illinois, the average relative humidity in December is 82%.

What is the driest month in Spring Grove?

December is the month with the least rainfall in Spring Grove. Rain falls for 6 days and accumulates 1.06" (27mm) of precipitation.

How many days does it rain in December in Spring Grove?

In Spring Grove, Illinois, in December, it is raining for 6 days, with typically 1.06" (27mm) of accumulated precipitation.

How much does it snow in Spring Grove in December?

In December, it is snowing for 7.8 days. Throughout December, 2.28" (58mm) of snow is accumulated.

What is the month with the shortest days in Spring Grove?

The month with the shortest days in Spring Grove, Illinois, is December, with an average of 9h and 6min of daylight.

What is the average length of the day in December in Spring Grove?

In Spring Grove, Illinois, the average day length in December is 9h and 8min.

What time are sunrise and sunset in December in Spring Grove?

On the first day of December in Spring Grove, sunrise is at 7:03 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:30 pm CST.

How many hours of sunshine does Spring Grove have in December?

The average sunshine duration in December is 3.9h.

What are the months with the lowest UV index in Spring Grove?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Spring Grove, Illinois.

What is the UV index intensity in December in Spring Grove?

The average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.
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
Spring Grove, IL

Average temperature in December - Spring Grove, IL
  • Average high temperature in December: 32.5°F

The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (26.2°F).

  • Average low temperature in December: 22.8°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).

Average pressure in December
Spring Grove, IL

Average pressure in December - Spring Grove, IL
  • Average pressure in December: 30.09"Hg

The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Spring Grove, IL

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

The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

Average humidity in December
Spring Grove, IL

Average humidity in December - Spring Grove, IL
  • Average humidity in December: 82%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (76%).

Average rainfall in December
Spring Grove, IL

Average rainfall in December - Spring Grove, IL
  • Average rainfall in December: 1.06"

The wettest month (with the highest rainfall) is June (3.54").
The driest month (with the least rainfall) is December (1.06").

Average rainfall days in December
Spring Grove, IL

Average rainfall days in December - Spring Grove, IL
  • Average rainfall days in December: 6 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (3.4 days).

Average snowfall in December
Spring Grove, IL

Average snowfall in December - Spring Grove, IL
  • Average snowfall in December: 2.28"

The month with the highest snowfall is January (4.33").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Spring Grove, IL

Average snowfall days in December - Spring Grove, IL
  • Average snowfall days in December: 7.8 days

The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Spring Grove, IL

Average daylight in December / Average sunshine in December - Spring Grove, IL
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in December: 3h and 5min

The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The months with the least sunshine are January and February (Average sunshine: 3h and 36min).

Average sunshine days in December
Spring Grove, IL

Average sunshine days in December - Spring Grove, IL
  • Average sunshine days in December: 18.6 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (9.9 days).

Average UV index in December
Spring Grove, IL

Average UV index in December - Spring Grove, IL
  • Average UV index in December: 1

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in December
Spring Grove, IL

Average cloud cover in December - Spring Grove, IL
  • Average cloud cover in December: 60

The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July, August and September (Cloud cover 32).

Average visibility in December
Spring Grove, IL

Average visibility in December - Spring Grove, 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).

Spring Grove, Illinois, USA

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