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 is characterized by a reduction in the average high-temperature, from a chilly 46.9°F (8.3°C) in November to a wintry 34.5°F (1.4°C). Throughout December nights, Geneseo registers an average low-temperature of 24.1°F (-4.4°C).Humidity
In December, the average relative humidity is 82%.Rainfall
January and December are months with the least rain in Geneseo, Illinois, when the rain falls for 5.5 days and typically aggregates up to 0.63" (16mm) of rain.Snowfall
Months with snowfall in Geneseo are January through April, October through December. In Geneseo, Illinois, during December, snow falls for 5.7 days and regularly aggregates up to 0.94" (24mm) of snow. Throughout the year, there are 29.3 snowfall days, and 6.54" (166mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of December in Geneseo, sunrise is at 7:08 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:41 pm CST.
Sunshine
In December, the average sunshine in Geneseo is 4.3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 1 during December translates into these guidelines:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Frequently asked questions
How cold is December in Geneseo?
What is the average humidity in December in Geneseo?
What is the driest month in Geneseo?
How much does it rain in Geneseo in December?
How much does it snow in Geneseo in December?
What is the month with the shortest days in Geneseo?
How many hours of daylight does Geneseo have in December?
When is the sunrise / sunset in December in Geneseo?
How many hours of sunshine does Geneseo have in December?
When is the lowest UV index in Geneseo?
How high is the UV index in December in Geneseo?
Average temperature in December
Geneseo, IL
- Average high temperature in December: 34.5°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 (28°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in December
Geneseo, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Geneseo, IL
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Geneseo, IL
- Average humidity in December: 82%
The months with the highest relative humidity are January and July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Geneseo, IL
- Average rainfall in December: 0.63"
The wettest month (with the highest rainfall) is May (2.48").
The driest months (with the least rainfall) are January and December (0.63").
Average rainfall days in December
Geneseo, IL
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in December
Geneseo, IL
- Average snowfall in December: 0.94"
The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Geneseo, IL
- Average snowfall days in December: 5.7 days
The month with the highest number of snowfall days is January (9 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
Geneseo, IL
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Geneseo, IL
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is December (20.9 days).
The month with the least sunshine days is June (12 days).
Average UV index in December
Geneseo, IL
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Geneseo, IL
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in December
Geneseo, 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).
Geneseo, Illinois, USA
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