December weather forecastWaverly, IL
December
Weather in December
The first month of the winter, December, is also an icy month in Waverly, Illinois, with an average temperature varying between 39°F (3.9°C) and 28°F (-2.2°C).Temperature
Waverly's December weather shows a moderate shift in high-temperatures, falling from November's fresh 50.7°F (10.4°C) to a cold 39°F (3.9°C). In December, the temperature in Waverly drops to an average of 28°F (-2.2°C) at night.Humidity
In December, the average relative humidity is 78%.Rainfall
February and December are months with the least rain when the rain falls for 6 days and typically aggregates up to 0.79" (20mm) of rain.Snowfall
Months with snowfall in Waverly are January through April, November and December. In Waverly, during December, snow falls for 4.7 days and regularly aggregates up to 0.75" (19mm) of snow. Throughout the year, there are 23.2 snowfall days, and 4.45" (113mm) of snow is accumulated.Daylight
The month with the shortest days in Waverly, Illinois, is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:01 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:45 pm CST.
Sunshine
In December, the average sunshine in Waverly is 4.7h.UV index
The months with the lowest UV index in Waverly, Illinois, 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 unprotected exposure to Sun's UV rays for average individuals.Note: In December, the UV index of 2 transforms into the following advice:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Opt for tightly woven and loose clothing to enhance protection from the Sun. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Waverly, IL
- Average high temperature in December: 39°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in December
Waverly, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Waverly, IL
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in December
Waverly, IL
- Average humidity in December: 78%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Waverly, IL
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is June (2.36").
The driest months (with the least rainfall) are February and December (0.79").
Average rainfall days in December
Waverly, IL
- Average rainfall days in December: 6 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in December
Waverly, IL
- Average snowfall in December: 0.75"
The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Waverly, IL
- Average snowfall days in December: 4.7 days
The month with the highest number of snowfall days is January (7.6 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
Waverly, IL
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 42min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Waverly, IL
- Average sunshine days in December: 20.2 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in December
Waverly, 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
Waverly, IL
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
Waverly, 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).
