December weather forecast
Keithsburg, IL

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Weather in December

The first month of the winter, December, is still a cold month in Keithsburg, Illinois, with an average temperature fluctuating between 24.8°F (-4°C) and 36.1°F (2.3°C).

Temperature

December ushers in a slight temperature change, with average high-temperatures reducing from November's frosty 48.2°F (9°C) to an icy 36.1°F (2.3°C). Keithsburg's nighttime temperature during December is consistently averaged at a subzero cold 24.8°F (-4°C).

Humidity

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

Rainfall

January and December are months with the least rain in Keithsburg when the rain falls for 7.7 days and typically aggregates up to 1.46" (37mm) of rain.

Snowfall

Months with snowfall in Keithsburg are January through April, October through December. In Keithsburg, in December, snow falls for 6.9 days, with typically accumulated 2.05" (52mm) of snow. In Keithsburg, during the entire year, snow falls for 34.6 days and aggregates up to 13.66" (347mm) of snow.

Daylight

December has the shortest days of the year in Keithsburg, with an average of 9h and 18min of daylight.
On the first day of December in Keithsburg, sunrise is at 7:10 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:45 pm CST.

Sunshine

The average sunshine in December in Keithsburg, Illinois, is 4.6h.

UV index

In December, the average daily maximum UV index in Keithsburg is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A maximum UV index of 2 in December translates into the following recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. 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 Keithsburg?

The average high-temperature, in December, in Keithsburg, is 36.1°F (2.3°C), while the average low-temperature is 24.8°F (-4°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, is calculated to be 87.8°F (31°C).

What is the average humidity in December in Keithsburg?

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

What is the driest month in Keithsburg?

January and December are months with the least rain in Keithsburg when the rain falls for 7.7 days and typically aggregates up to 1.46" (37mm) of rain.

How many days does it rain in December in Keithsburg?

In Keithsburg, in December, during 7.7 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.

How many days does it snow in December in Keithsburg?

In Keithsburg, during December, snow falls for 6.9 days and regularly aggregates up to 2.05" (52mm) of snow.

What is the month with the shortest days in Keithsburg?

The month with the shortest days in Keithsburg is December, with an average of 9h and 18min of daylight.

What is the average length of the day in December in Keithsburg?

The average day length in December is 9h and 16min.

When are sunrise and sunset in December in Keithsburg?

In December, on the first day of the month, sunrise is at 7:10 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:45 pm CST.

How many hours of sunshine does Keithsburg have in December?

In Keithsburg, Illinois, the average sunshine duration in December is 4.6h.

How high is the UV index in December in Keithsburg?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes 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
Keithsburg, IL

Average temperature in December - Keithsburg, IL
  • Average high temperature in December: 36.1°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in December: 24.8°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 (17.8°F).

Average pressure in December
Keithsburg, IL

Average pressure in December - Keithsburg, IL
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
Keithsburg, IL

Average wind speed in December - Keithsburg, IL
  • Average wind speed in December: 10mph

The windiest months (with the highest average wind speed) are January and April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

Average humidity in December
Keithsburg, IL

Average humidity in December - Keithsburg, 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 (70%).

Average rainfall in December
Keithsburg, IL

Average rainfall in December - Keithsburg, IL
  • Average rainfall in December: 1.46"

The wettest month (with the highest rainfall) is May (4.57").
The driest months (with the least rainfall) are January and December (1.46").

Average rainfall days in December
Keithsburg, IL

Average rainfall days in December - Keithsburg, IL
  • Average rainfall days in December: 7.7 days

The month with the highest number of rainy days is May (19.9 days).
The month with the least rainy days is February (5.7 days).

Average snowfall in December
Keithsburg, IL

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

The month with the highest snowfall is January (4.06").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Keithsburg, IL

Average snowfall days in December - Keithsburg, IL
  • Average snowfall days in December: 6.9 days

The month with the highest number of snowfall days is January (10.8 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
Keithsburg, IL

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

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 4min

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

Average sunshine days in December
Keithsburg, IL

Average sunshine days in December - Keithsburg, IL
  • Average sunshine days in December: 17.3 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is June (8.3 days).

Average UV index in December
Keithsburg, IL

Average UV index in December - Keithsburg, IL
  • Average UV index in December: 2

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

Average cloud cover in December
Keithsburg, IL

Average cloud cover in December - Keithsburg, IL
  • Average cloud cover in December: 52

The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).

Average visibility in December
Keithsburg, IL

Average visibility in December - Keithsburg, 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).

Keithsburg, Illinois, USA

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