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 shifts into December, a slight alteration in temperatures is observed, with average highs reducing from a frosty 49.1°F (9.5°C) to an icy 37.4°F (3°C). Waynesville records an average nighttime low of 27°F (-2.8°C) in December.Humidity
The average relative humidity in December in Waynesville, Illinois, is 79%.Rainfall
The month with the least rainfall in Waynesville is December, when the rain falls for 7.2 days and typically collects 0.87" (22mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In December, it is snowing for 5.3 days. Throughout December, 0.91" (23mm) of snow is accumulated. Throughout the year, there are 27.1 snowfall days, and 7.2" (183mm) of snow is accumulated.Daylight
December has the shortest days of the year in Waynesville, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:31 pm. On the last day of December, in Waynesville, sunrise is at 7:18 am and sunset at 4:40 pm CST.
Sunshine
In Waynesville, the average sunshine in December is 4.5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Waynesville. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 2 during December leads to these instructions:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Waynesville in December?
What is the average humidity in December in Waynesville?
What is the driest month in Waynesville?
How much does it rain in Waynesville in December?
How much does it snow in Waynesville in December?
What is the month with the shortest days in Waynesville?
What is the average length of the day in December in Waynesville?
What time are sunrise and sunset in December in Waynesville?
How many hours of sunshine does Waynesville have in December?
What is the month with the lowest UV index in Waynesville?
What is the UV index intensity in December in Waynesville?
Average temperature in December
Waynesville, IL
- Average high temperature in December: 37.4°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in December: 27°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Waynesville, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Waynesville, IL
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Waynesville, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Waynesville, IL
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is December (0.87").
Average rainfall days in December
Waynesville, IL
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in December
Waynesville, IL
- Average snowfall in December: 0.91"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Waynesville, IL
- Average snowfall days in December: 5.3 days
The month with the highest number of snowfall days is January (9.5 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
Waynesville, 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 3min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Waynesville, IL
- Average sunshine days in December: 20 days
The months with the most sunshine days are November and December (20 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in December
Waynesville, 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
Waynesville, IL
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in December
Waynesville, 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).
Waynesville, Illinois, USA
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