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
The arrival of December corresponds with a temperature reduction, down from November's fresh 52.3°F (11.3°C) to an icy 41.9°F (5.5°C). The month of December records an average low-temperature of 30.6°F (-0.8°C) in Centralia.Humidity
The average relative humidity in December is 78%.Rainfall
In Centralia, in December, during 4.1 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, in Centralia, there are 83.2 rainfall days, and 6.81" (173mm) of precipitation is accumulated.Snowfall
Months with snowfall in Centralia are January through March, November and December. In Centralia, Illinois, in December, during 2.2 snowfall days, 0.16" (4mm) of snow is typically accumulated. In Centralia, during the entire year, snow falls for 11.9 days and aggregates up to 0.79" (20mm) of snow.Daylight
December has the shortest days of the year in Centralia, Illinois, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 6:55 am and sunset at 4:35 pm. On the last day of December, in Centralia, sunrise is at 7:13 am and sunset at 4:45 pm CST.
Sunshine
In December, the average sunshine in Centralia, Illinois, is 4.8h.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, an average UV index of 2 transforms into the following instructions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Centralia?
What is the average humidity in December in Centralia?
How many days does it rain in December in Centralia?
How many days does it snow in December in Centralia?
What is the month with the shortest days in Centralia?
What is the average length of the day in December in Centralia?
When are sunrise and sunset in December in Centralia?
How long on average sun shines in December in Centralia?
When is the lowest UV index in Centralia?
What is the UV index intensity in December in Centralia?
Average temperature in December
Centralia, IL
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in December: 30.6°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Centralia, 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 (29.93"Hg).
Average wind speed in December
Centralia, IL
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is February (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in December
Centralia, IL
- Average humidity in December: 78%
The months with the highest relative humidity are May and July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Centralia, IL
- Average rainfall in December: 0.43"
The wettest months (with the highest rainfall) are April and July (0.75").
The driest month (with the least rainfall) is September (0.24").
Average rainfall days in December
Centralia, IL
- Average rainfall days in December: 4.1 days
The month with the highest number of rainy days is May (10.1 days).
The month with the least rainy days is January (3.7 days).
Average snowfall in December
Centralia, IL
- Average snowfall in December: 0.16"
The month with the highest snowfall is January (0.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Centralia, IL
- Average snowfall days in December: 2.2 days
The month with the highest number of snowfall days is January (3.8 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
Centralia, IL
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
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
Centralia, IL
- Average sunshine days in December: 24.5 days
The months with the most sunshine days are January and December (24.5 days).
The month with the least sunshine days is May (16.8 days).
Average UV index in December
Centralia, IL
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in December
Centralia, IL
- Average cloud cover in December: 50
The months with the most cloud cover are January and February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Centralia, 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).
Centralia, Illinois, USA
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