December weather forecast
East Gillespie, IL

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Weather in December

December, the first month of the winter in East Gillespie, is still a cold month, with temperature in the range of an average low of 29.1°F (-1.6°C) and an average high of 40.3°F (4.6°C).

Temperature

December brings a decrease in the average high-temperature, shifting from a cool 51.6°F (10.9°C) in November to a wintry 40.3°F (4.6°C). The low-temperature average for East Gillespie during December stands at a freezing cold 29.1°F (-1.6°C).

Humidity

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

Rainfall

In East Gillespie, in December, it is raining for 6.7 days, with typically 0.87" (22mm) of accumulated precipitation. Throughout the year, there are 121.4 rainfall days, and 14.72" (374mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through March, November and December. December is the month with the most snowfall. Snow falls for 3.8 days and accumulates 0.98" (25mm) 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 7:00 am and sunset at 4:36 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:46 pm CST.

Sunshine

In East Gillespie, 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 value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.
Note: In December, the maximum UV index of 2 suggests these recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

East Gillespie in December has an average high-temperature of 40.3°F (4.6°C) and an average low-temperature of 29.1°F (-1.6°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in August is evaluated at 91.4°F (33°C).

What is the average humidity in December?

In December, the average relative humidity is 78%.

How much does it rain in December?

In East Gillespie, during December, the rain falls for 6.7 days and regularly aggregates up to 0.87" (22mm) of precipitation.

When does it snow the most?

December is the month with the most snowfall. Snow falls for 3.8 days and accumulates 0.98" (25mm) of snow.

How many days does it snow in December?

In East Gillespie, in December, during 3.8 snowfall days, 0.98" (25mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 30min of daylight, December has the shortest days of the year.

How many hours of daylight does East Gillespie have in December?

The average day length in December is 9h and 28min.

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 7:18 am and sunset at 4:46 pm CST.

How long on average sun shines in December?

The average sunshine duration in December is 4.8h.

What is the month with 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.

What is the UV index intensity in December in East Gillespie?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk 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
East Gillespie, IL

Average temperature in December - East Gillespie, IL
  • Average high temperature in December: 40.3°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.6°F).

  • Average low temperature in December: 29.1°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

Average pressure in December
East Gillespie, IL

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

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
East Gillespie, IL

Average wind speed in December - East Gillespie, IL
  • Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).

Average humidity in December
East Gillespie, IL

Average humidity in December - East Gillespie, IL
  • Average humidity in December: 78%

The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
East Gillespie, IL

Average rainfall in December - East Gillespie, IL
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is February (0.67").

Average rainfall days in December
East Gillespie, IL

Average rainfall days in December - East Gillespie, IL
  • Average rainfall days in December: 6.7 days

The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is January (5.8 days).

Average snowfall in December
East Gillespie, IL

Average snowfall in December - East Gillespie, IL
  • Average snowfall in December: 0.98"

The month with the highest snowfall is December (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
East Gillespie, IL

Average snowfall days in December - East Gillespie, IL
  • Average snowfall days in December: 3.8 days

The month with the highest number of snowfall days is January (6.3 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
East Gillespie, IL

Average daylight in December / Average sunshine in December - East Gillespie, 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 months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

Average sunshine days in December
East Gillespie, IL

Average sunshine days in December - East Gillespie, IL
  • Average sunshine days in December: 20.5 days

The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is July (12.5 days).

Average UV index in December
East Gillespie, IL

Average UV index in December - East Gillespie, 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
East Gillespie, IL

Average cloud cover in December - East Gillespie, IL
  • Average cloud cover in December: 50

The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).

Average visibility in December
East Gillespie, IL

Average visibility in December - East Gillespie, 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).

East Gillespie, Illinois, USA

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