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 correlates with a reduction in the average high-temperature, down from a frosty 49.8°F (9.9°C) in November to an icy 38.5°F (3.6°C). During December, the temperature in Oreana, Illinois, is averaged to a low of 27.9°F (-2.3°C) at night.Humidity
In Oreana, the average relative humidity in December is 79%.Rainfall
The months with the least rainfall are February and December Rain falls for 7.1 days and accumulates 0.87" (22mm) of rain.Snowfall
January through April, November and December are months with snowfall. In December, it is snowing for 5.3 days. Throughout December, 0.83" (21mm) of snow is accumulated. In Oreana, during the entire year, snow falls for 23.1 days and aggregates up to 5.67" (144mm) of snow.Daylight
December has the shortest days of the year in Oreana, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 6:58 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:40 pm CST.
Sunshine
The average sunshine in December is 4.6h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
How cold is it in Oreana in December?
What is the average humidity in December in Oreana?
What is the driest month in Oreana?
How many days does it rain in December in Oreana?
How many days does it snow in December in Oreana?
What is the month with the shortest days in Oreana?
What is the average length of the day in December in Oreana?
What time are sunrise and sunset in December in Oreana?
How long on average sun shines in December in Oreana?
What are the months with the lowest UV index in Oreana?
What is the UV index reading in December in Oreana?
Average temperature in December
Oreana, IL
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in December: 27.9°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in December
Oreana, 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 (29.92"Hg).
Average wind speed in December
Oreana, IL
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in December
Oreana, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Oreana, IL
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is May (2.01").
The driest months (with the least rainfall) are February and December (0.87").
Average rainfall days in December
Oreana, IL
- Average rainfall days in December: 7.1 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Oreana, IL
- Average snowfall in December: 0.83"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Oreana, IL
- Average snowfall days in December: 5.3 days
The month with the highest number of snowfall days is January (7.2 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
Oreana, 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 June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Oreana, IL
- Average sunshine days in December: 19.4 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in December
Oreana, 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
Oreana, IL
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in December
Oreana, 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).
Oreana, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
