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
December's arrival coincides with a drop in the average high-temperature, decreasing from November's cool 52.7°F (11.5°C) to a frosty 43.2°F (6.2°C). During December, Opdyke sees a mean low-temperature of 30.9°F (-0.6°C).Humidity
The average relative humidity in December is 78%.Rainfall
In Opdyke, in December, during 8.9 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. Throughout the year, in Opdyke, Illinois, there are 145.8 rainfall days, and 29.13" (740mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Opdyke, in December, during 2.9 snowfall days, 1.06" (27mm) of snow is typically accumulated. Throughout the year, there are 15.4 snowfall days, and 5.87" (149mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 6:53 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 4:45 pm CST.
Sunshine
In Opdyke, the average sunshine in December is 4.8h.UV index
January, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In December, a daily UV index of 2 turns into the following recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
Is December cold in Opdyke?
What is the average humidity in December in Opdyke?
How many days does it rain in December in Opdyke?
How much does it snow in Opdyke in December?
What is the month with the shortest days in Opdyke?
What is the average length of the day in December in Opdyke?
When is the sunrise / sunset in December in Opdyke?
How many hours of sunshine does Opdyke have in December?
What are the months with the lowest UV index in Opdyke?
How high is the UV index in December in Opdyke?
Average temperature in December
Opdyke, IL
- Average high temperature in December: 43.2°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in December
Opdyke, IL
- Average pressure in December: 30.14"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
Opdyke, IL
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).
Average humidity in December
Opdyke, IL
- Average humidity in December: 78%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Opdyke, IL
- Average rainfall in December: 2.01"
The wettest month (with the highest rainfall) is April (3.78").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in December
Opdyke, IL
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in December
Opdyke, IL
- Average snowfall in December: 1.06"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Opdyke, IL
- Average snowfall days in December: 2.9 days
The month with the highest number of snowfall days is January (4.8 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
Opdyke, IL
- Average daylight in December: 9h and 4min
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 36min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in December
Opdyke, IL
- Average sunshine days in December: 19.9 days
The month with the most sunshine days is October (20.3 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in December
Opdyke, 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
Opdyke, IL
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in December
Opdyke, 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).
Opdyke, Illinois, USA
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