December weather forecastGenoa, IL
December
Weather in December
The first month of the winter, December, is also a wintry month in Genoa, Illinois, with an average temperature fluctuating between 32.7°F (0.4°C) and 22.5°F (-5.3°C).Temperature
December suggests a modest reduction in the average high-temperature, shifting from a frosty 44.6°F (7°C) in November to an icy 32.7°F (0.4°C). Throughout the month of December, Genoa witnesses an average low-temperature of 22.5°F (-5.3°C).Humidity
In December, the average relative humidity is 83%.Rainfall
In Genoa, during December, the rain falls for 5.5 days and regularly aggregates up to 0.59" (15mm) of precipitation. In Genoa, during the entire year, the rain falls for 116.8 days and collects up to 11.69" (297mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Genoa, in December, during 8.5 snowfall days, 0.59" (15mm) of snow is typically accumulated. In Genoa, during the entire year, snow falls for 38.1 days and aggregates up to 4.69" (119mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:04 am and sunset at 4:23 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:33 pm CST.
Sunshine
In December, the average sunshine is 3.9h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average UV index of 1 in December transforms into this advice:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Opt for tightly woven and loose clothing to enhance protection from the Sun. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Genoa, IL
- Average high temperature in December: 32.7°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in December: 22.5°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).
Average pressure in December
Genoa, IL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Genoa, IL
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
Genoa, IL
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Genoa, IL
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is June (1.81").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in December
Genoa, IL
- Average rainfall days in December: 5.5 days
The months with the highest number of rainy days are May and June (15.1 days).
The month with the least rainy days is February (3.5 days).
Average snowfall in December
Genoa, IL
- Average snowfall in December: 0.59"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Genoa, IL
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Genoa, IL
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 54min
The months with the most sunshine are June, July and August (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Genoa, IL
- Average sunshine days in December: 19 days
The month with the most sunshine days is October (19.6 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in December
Genoa, IL
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Genoa, IL
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 35).
Average visibility in December
Genoa, IL
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).
