December weather forecastPontoon Beach, IL
December
Weather in December
December, the first month of the winter in Pontoon Beach, is also an icy month, with an average temperature varying between 41.9°F (5.5°C) and 30.2°F (-1°C).Temperature
A change in temperatures is noted as November gives way to December, with average highs reducing from a fresh 52.9°F (11.6°C) to a cold 41.9°F (5.5°C). Pontoon Beach's average low-temperature is measured at a subzero cold 30.2°F (-1°C) during December.Humidity
The average relative humidity in December is 76%.Rainfall
In Pontoon Beach, in December, it is raining for 9.2 days, with typically 2.32" (59mm) of accumulated precipitation. In Pontoon Beach, during the entire year, the rain falls for 159.5 days and collects up to 36.06" (916mm) of precipitation.Snowfall
Months with snowfall in Pontoon Beach are January through March, November and December. In Pontoon Beach, Illinois, in December, snow falls for 4 days, with typically accumulated 2.2" (56mm) of snow. Throughout the year, there are 20.3 snowfall days, and 8.07" (205mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:00 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:49 pm CST.
Sunshine
The average sunshine in December is 4.9h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 2 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. To guard against the harmful effects of the Sun, minimize exposure during midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Pontoon Beach, IL
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in December: 30.2°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Pontoon Beach, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Pontoon Beach, IL
- Average wind speed in December: 8.7mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).
Average humidity in December
Pontoon Beach, IL
- Average humidity in December: 76%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Pontoon Beach, IL
- Average rainfall in December: 2.32"
The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is February (1.93").
Average rainfall days in December
Pontoon Beach, IL
- Average rainfall days in December: 9.2 days
The months with the highest number of rainy days are May and July (17.8 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in December
Pontoon Beach, IL
- Average snowfall in December: 2.2"
The month with the highest snowfall is February (2.4").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Pontoon Beach, IL
- Average snowfall days in December: 4 days
The month with the highest number of snowfall days is January (6.3 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
Pontoon Beach, IL
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Pontoon Beach, IL
- Average sunshine days in December: 18 days
The month with the most sunshine days is December (18 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in December
Pontoon Beach, IL
- Average UV index in December: 2
The months with the highest UV index are May, 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
Pontoon Beach, IL
- Average cloud cover in December: 48
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility in December
Pontoon Beach, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
