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, Claytonville sees a drop in the average high-temperature, transitioning from a frosty 47.8°F (8.8°C) to a wintry 36.7°F (2.6°C). Claytonville observes an average low-temperature of 26.4°F (-3.1°C) during December nights.Humidity
In Claytonville, Illinois, the average relative humidity in December is 81%.Rainfall
In December, in Claytonville, Illinois, the rain falls for 8.4 days. Throughout December, 1.18" (30mm) of precipitation is accumulated. Throughout the year, in Claytonville, there are 143.2 rainfall days, and 22.24" (565mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Claytonville. In December, in Claytonville, it is snowing for 7 days. Throughout December, 1.46" (37mm) of snow is accumulated. In Claytonville, Illinois, during the entire year, snow falls for 32.6 days and aggregates up to 9.69" (246mm) of snow.Daylight
The month with the shortest days in Claytonville is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 6:56 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:34 pm CST.
Sunshine
In Claytonville, the average sunshine in December is 4.3h.UV index
The months with the lowest UV index in Claytonville are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Claytonville in December?
What is the average humidity in December in Claytonville?
How many days does it rain in December in Claytonville?
How much does it snow in Claytonville in December?
What is the month with the shortest days in Claytonville?
How many hours of daylight does Claytonville have in December?
When is the sunrise / sunset in December in Claytonville?
How many hours of sunshine does Claytonville have in December?
What are the months with the lowest UV index in Claytonville?
How high is the UV index in December in Claytonville?
Average temperature in December
Claytonville, IL
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Claytonville, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Claytonville, IL
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in December
Claytonville, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Claytonville, IL
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in December
Claytonville, IL
- Average rainfall days in December: 8.4 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (6.4 days).
Average snowfall in December
Claytonville, IL
- Average snowfall in December: 1.46"
The month with the highest snowfall is January (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Claytonville, IL
- Average snowfall days in December: 7 days
The month with the highest number of snowfall days is January (10.4 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
Claytonville, 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 18min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Claytonville, IL
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
Claytonville, 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
Claytonville, IL
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in December
Claytonville, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Claytonville, Illinois, USA
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