Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
As November transitions into December, Quincy sees a drop in the average high-temperature, transitioning from a cool 50.2°F (10.1°C) to an icy 38.5°F (3.6°C). In the month of December, Quincy's average low-temperature falls to a freezing cold 26.8°F (-2.9°C).Humidity
In December, the average relative humidity in Quincy, Illinois, is 78%.Rainfall
The months with the least rainfall in Quincy are January and December Rain falls for 5.8 days and accumulates 1.02" (26mm) of rain.Snowfall
January through April, October through December are months with snowfall in Quincy, Illinois. In December, in Quincy, it is snowing for 5.5 days. Throughout December, 1.46" (37mm) of snow is accumulated. Throughout the year, there are 27.6 snowfall days, and 7.95" (202mm) of snow is accumulated.Daylight
December has the shortest days of the year in Quincy, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:08 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:50 pm CST.
Sunshine
In Quincy, the average sunshine in December is 4.7h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Quincy. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 2 during December leads to these instructions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold in Quincy?
What is the average humidity in December in Quincy?
What is the driest month in Quincy?
How many days does it rain in December in Quincy?
How much does it snow in Quincy in December?
What is the month with the shortest days in Quincy?
What is the average length of the day in December in Quincy?
When are sunrise and sunset in December in Quincy?
How long on average sun shines in December in Quincy?
When is the lowest UV index in Quincy?
How high is the UV index in December in Quincy?
Average temperature in December
Quincy, IL
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in December: 26.8°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in December
Quincy, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Quincy, IL
- Average wind speed in December: 9.8mph
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 July (6.4mph).
Average humidity in December
Quincy, IL
- Average humidity in December: 78%
The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Quincy, IL
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is May (3.35").
The driest months (with the least rainfall) are January and December (1.02").
Average rainfall days in December
Quincy, IL
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (5 days).
Average snowfall in December
Quincy, IL
- Average snowfall in December: 1.46"
The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Quincy, IL
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (8.8 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
Quincy, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Quincy, IL
- Average sunshine days in December: 19.6 days
The month with the most sunshine days is December (19.6 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in December
Quincy, 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
Quincy, IL
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Quincy, 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).
Quincy, Illinois, USA
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