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 brings a decrease in the average high-temperature, falling from November's chilly 45.5°F (7.5°C) to a cold 34.3°F (1.3°C). The nighttime temperature in Rolling Meadows, Illinois, during December, averages of 24.8°F (-4°C).Humidity
The average relative humidity in December is 80%.Rainfall
In Rolling Meadows, in December, it is raining for 9.1 days, with typically 1.65" (42mm) of accumulated precipitation. In Rolling Meadows, during the entire year, the rain falls for 142.7 days and collects up to 27.91" (709mm) of precipitation.Snowfall
Months with snowfall in Rolling Meadows are January through May, October through December. In Rolling Meadows, Illinois, during December, snow falls for 10.9 days and regularly aggregates up to 3.23" (82mm) of snow. Throughout the year, in Rolling Meadows, there are 48.8 snowfall days, and 21.02" (534mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:01 am and sunset at 4:21 pm. On the last day of December, in Rolling Meadows, sunrise is at 7:20 am and sunset at 4:30 pm CST.
Sunshine
The average sunshine in December is 4h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 1 during December, leads to the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
How cold is it in Rolling Meadows in December?
What is the average humidity in December in Rolling Meadows?
How many days does it rain in December in Rolling Meadows?
How many days does it snow in December in Rolling Meadows?
What is the month with the shortest days in Rolling Meadows?
What is the average length of the day in December in Rolling Meadows?
When are sunrise and sunset in December in Rolling Meadows?
How long on average sun shines in December in Rolling Meadows?
When is the lowest UV index in Rolling Meadows?
How high is the UV index in December in Rolling Meadows?
Average temperature in December
Rolling Meadows, IL
- Average high temperature in December: 34.3°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 (27.9°F).
- Average low temperature in December: 24.8°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in December
Rolling Meadows, IL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Rolling Meadows, IL
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Rolling Meadows, IL
- Average humidity in December: 80%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Rolling Meadows, IL
- Average rainfall in December: 1.65"
The wettest months (with the highest rainfall) are April and May (3.46").
The driest month (with the least rainfall) is November (1.57").
Average rainfall days in December
Rolling Meadows, IL
- Average rainfall days in December: 9.1 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Rolling Meadows, IL
- Average snowfall in December: 3.23"
The month with the highest snowfall is February (5.71").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rolling Meadows, IL
- Average snowfall days in December: 10.9 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rolling Meadows, IL
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Rolling Meadows, IL
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in December
Rolling Meadows, IL
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Rolling Meadows, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in December
Rolling Meadows, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Rolling Meadows, Illinois, USA
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