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's onset brings a slight change in high-temperatures, falling from a fresh 52.9°F (11.6°C) in November to a wintry 41.9°F (5.5°C). In December, Pontoon Beach encounters an average low-temperature of 30.2°F (-1°C) during the night.Humidity
In December, the average relative humidity in Pontoon Beach is 76%.Rainfall
In December, the rain falls for 9.2 days. Throughout December, 2.32" (59mm) of precipitation is accumulated. Throughout the year, there are 159.5 rainfall days, and 36.06" (916mm) of precipitation is accumulated.Snowfall
Months with snowfall in Pontoon Beach are January through March, November and December. In Pontoon Beach, in December, during 4 snowfall days, 2.2" (56mm) of snow is typically accumulated. In Pontoon Beach, Illinois, during the entire year, snow falls for 20.3 days and aggregates up to 8.07" (205mm) of snow.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
In Pontoon Beach, the average sunshine in December is 4.9h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Pontoon Beach. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Frequently asked questions
How cold is December in Pontoon Beach?
What is the average humidity in December in Pontoon Beach?
How much does it rain in Pontoon Beach in December?
How many days does it snow in December in Pontoon Beach?
What is the month with the shortest days in Pontoon Beach?
What is the average length of the day in December in Pontoon Beach?
When is the sunrise / sunset in December in Pontoon Beach?
How long on average sun shines in December in Pontoon Beach?
What is the month with the lowest UV index in Pontoon Beach?
What is the UV index reading in December in Pontoon Beach?
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 3min
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 5min
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).
Pontoon Beach, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
