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 47.3°F (8.5°C) in November to an icy 36.1°F (2.3°C). An average nighttime temperature of 25.7°F (-3.5°C) is noted in Saint Anne during the month of December.Humidity
In December, the average relative humidity is 81%.Rainfall
In Saint Anne, in December, during 7 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, in Saint Anne, there are 132 rainfall days, and 15.16" (385mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Saint Anne. In Saint Anne, in December, during 7.5 snowfall days, 0.87" (22mm) of snow is typically accumulated. In Saint Anne, during the entire year, snow falls for 36.5 days and aggregates up to 5.28" (134mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:57 am and sunset at 4:23 pm. On the last day of December, sunrise is at 7:15 am and sunset at 4:32 pm CST.
Sunshine
In Saint Anne, the average sunshine in December is 4.2h.UV index
The months with the lowest UV index in Saint Anne are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 1 during December translates into the following guidance:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. To avoid the Sun's strongest rays, limit exposure around the mid-day period. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Saint Anne?
What is the average humidity in December in Saint Anne?
How much does it rain in Saint Anne in December?
How many days does it snow in December in Saint Anne?
What is the month with the shortest days in Saint Anne?
What is the average length of the day in December in Saint Anne?
When are sunrise and sunset in December in Saint Anne?
How many hours of sunshine does Saint Anne have in December?
What are the months with the lowest UV index in Saint Anne?
How high is the UV index in December in Saint Anne?
Average temperature in December
Saint Anne, IL
- Average high temperature in December: 36.1°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Saint Anne, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Saint Anne, IL
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
Saint Anne, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Saint Anne, IL
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in December
Saint Anne, IL
- Average rainfall days in December: 7 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in December
Saint Anne, IL
- Average snowfall in December: 0.87"
The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Saint Anne, IL
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is January (10.3 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
Saint Anne, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 1min
The months with the most sunshine are June, July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Saint Anne, IL
- Average sunshine days in December: 17.9 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in December
Saint Anne, IL
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Saint Anne, IL
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Saint Anne, 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).
Saint Anne, Illinois, USA
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