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 beginning of December marks a decrease in the average high-temperature, transitioning from a frosty 47.8°F (8.8°C) in November to a cold 36.7°F (2.6°C). In December, the temperature in Cissna Park drops to an average of 26.4°F (-3.1°C) at night.Humidity
In Cissna Park, the average relative humidity in December is 81%.Rainfall
In Cissna Park, in December, during 8.4 rainfall days, 1.18" (30mm) of precipitation is typically accumulated. In Cissna Park, during the entire year, the rain falls for 143.2 days and collects up to 22.24" (565mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In December, in Cissna Park, it is snowing for 7 days. Throughout December, 1.46" (37mm) of snow is accumulated. Throughout the year, there are 32.6 snowfall days, and 9.69" (246mm) of snow is accumulated.Daylight
The month with the shortest days in Cissna Park is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 6:56 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:34 pm CST.
Sunshine
In December, the average sunshine in Cissna Park is 4.3h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cissna Park. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In December, a regular UV index of 2 translates into these guidelines:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
How cold is December in Cissna Park?
What is the average humidity in December in Cissna Park?
How much does it rain in Cissna Park in December?
How many days does it snow in December in Cissna Park?
What is the month with the shortest days in Cissna Park?
What is the average length of the day in December in Cissna Park?
When are sunrise and sunset in December in Cissna Park?
How long on average sun shines in December in Cissna Park?
What are the months with the lowest UV index in Cissna Park?
What is the UV index reading in December in Cissna Park?
Average temperature in December
Cissna Park, IL
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Cissna Park, 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 (29.93"Hg).
Average wind speed in December
Cissna Park, IL
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in December
Cissna Park, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Cissna Park, IL
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in December
Cissna Park, IL
- Average rainfall days in December: 8.4 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (6.4 days).
Average snowfall in December
Cissna Park, IL
- Average snowfall in December: 1.46"
The month with the highest snowfall is January (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Cissna Park, IL
- Average snowfall days in December: 7 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, August and September (0 days).
Average daylight in December /
Average sunshine in December
Cissna Park, 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 18min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Cissna Park, IL
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
Cissna Park, 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
Cissna Park, IL
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in December
Cissna Park, 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).
Cissna Park, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
