December weather forecast
Greenup, IL

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Weather in December

The first month of the winter, December, is still a cold month in Greenup, Illinois, with temperature in the range of an average low of 28.9°F (-1.7°C) and an average high of 39.7°F (4.3°C).

Temperature

In the transition to December, Greenup observes a drop in the average high-temperature, moving from a cool 50.5°F (10.3°C) in November to a wintry 39.7°F (4.3°C). An average low-temperature of 28.9°F (-1.7°C) is observed during the December nights.

Humidity

In Greenup, the average relative humidity in December is 80%.

Rainfall

In Greenup, in December, it is raining for 6.5 days, with typically 0.79" (20mm) of accumulated precipitation. Throughout the year, there are 115.9 rainfall days, and 11.26" (286mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. December is the month with the most snowfall in Greenup. Snow falls for 4 days and accumulates 0.47" (12mm) of snow.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:53 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:39 pm CST.

Sunshine

In December, the average sunshine is 4.4h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.
Note: In December, a regular UV index of 1 translates into these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. To protect against the Sun's most potent rays, avoid direct exposure around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Updated: Jun 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in Greenup?

Greenup in December has an average high-temperature of 39.7°F (4.3°C) and an average low-temperature of 28.9°F (-1.7°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is evaluated at 87.8°F (31°C).

What is the average humidity in December?

In Greenup, the average relative humidity in December is 80%.

How many days does it rain in December?

In Greenup, in December, it is raining for 6.5 days, with typically 0.79" (20mm) of accumulated precipitation.

When does it snow the most?

December is the month with the most snowfall. Snow falls for 4 days and accumulates 0.47" (12mm) of snow.

How many days does it snow in December?

In Greenup, in December, during 4 snowfall days, 0.47" (12mm) of snow is typically accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

How many hours of daylight does Greenup have in December?

In Greenup, the average day length in December is 9h and 28min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 6:53 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:39 pm CST.

How many hours of sunshine does Greenup have in December?

In Greenup, the average sunshine duration in December is 4.4h.

When is the lowest UV index?

The month with the lowest UV index is December, with an average maximum UV index of 1.

How high is the UV index in December?

In Greenup, the average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a low health threat from 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
Greenup, IL

Average temperature in December - Greenup, IL
  • Average high temperature in December: 39.7°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34.7°F).

  • Average low temperature in December: 28.9°F

The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

Average pressure in December
Greenup, IL

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Greenup, IL

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

The windiest months (with the highest average wind speed) are January and February (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.1mph).

Average humidity in December
Greenup, IL

Average humidity in December - Greenup, IL
  • Average humidity in December: 80%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Greenup, IL

Average rainfall in December - Greenup, IL
  • Average rainfall in December: 0.79"

The wettest month (with the highest rainfall) is April (1.54").
The driest month (with the least rainfall) is February (0.47").

Average rainfall days in December
Greenup, IL

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

The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is February (6 days).

Average snowfall in December
Greenup, IL

Average snowfall in December - Greenup, IL
  • Average snowfall in December: 0.47"

The month with the highest snowfall is December (0.47").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Greenup, IL

Average snowfall days in December - Greenup, IL
  • Average snowfall days in December: 4 days

The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Greenup, IL

Average daylight in December / Average sunshine in December - Greenup, 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 2min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days in December
Greenup, IL

Average sunshine days in December - Greenup, IL
  • Average sunshine days in December: 20.8 days

The month with the most sunshine days is October (21.2 days).
The month with the least sunshine days is May (12.4 days).

Average UV index in December
Greenup, IL

Average UV index in December - Greenup, IL
  • Average UV index in December: 1

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Greenup, IL

Average cloud cover in December - Greenup, IL
  • Average cloud cover in December: 53

The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in December
Greenup, IL

Average visibility in December - Greenup, IL
  • Average visibility in December: 6mi

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

Greenup, Illinois, USA

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