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
The move into December indicates a reduction in the average high-temperature, down from November's frosty 46.4°F (8°C) to a wintry 34.5°F (1.4°C). Tiskilwa records an average temperature drop to a freezing cold 24.1°F (-4.4°C) in December.Humidity
In Tiskilwa, Illinois, the average relative humidity in December is 82%.Rainfall
In Tiskilwa, in December, it is raining for 6.2 days, with typically 0.91" (23mm) of accumulated precipitation. Throughout the year, there are 130 rainfall days, and 17.64" (448mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Tiskilwa, in December, snow falls for 7.1 days, with typically accumulated 1.14" (29mm) of snow. In Tiskilwa, Illinois, during the entire year, snow falls for 33.4 days and aggregates up to 7.05" (179mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:05 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:39 pm CST.
Sunshine
The average sunshine in December is 4.2h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Tiskilwa in December?
What is the average humidity in December in Tiskilwa?
How many days does it rain in December in Tiskilwa?
How much does it snow in Tiskilwa in December?
What is the month with the shortest days in Tiskilwa?
What is the average length of the day in December in Tiskilwa?
When is the sunrise / sunset in December in Tiskilwa?
How many hours of sunshine does Tiskilwa have in December?
When is the lowest UV index in Tiskilwa?
What is the UV index reading in December in Tiskilwa?
Average temperature in December
Tiskilwa, IL
- Average high temperature in December: 34.5°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 24.1°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 (16.5°F).
Average pressure in December
Tiskilwa, IL
- Average pressure in December: 30.1"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
Tiskilwa, IL
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Tiskilwa, IL
- Average humidity in December: 82%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Tiskilwa, IL
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in December
Tiskilwa, IL
- Average rainfall days in December: 6.2 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.5 days).
Average snowfall in December
Tiskilwa, IL
- Average snowfall in December: 1.14"
The month with the highest snowfall is January (2.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Tiskilwa, IL
- Average snowfall days in December: 7.1 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Tiskilwa, 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 and July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Tiskilwa, IL
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in December
Tiskilwa, 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
Tiskilwa, IL
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in December
Tiskilwa, 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).
Tiskilwa, Illinois, USA
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