December weather forecastRochelle, IL
December
Weather in December
The first month of the winter, December, is still a cold month in Rochelle, Illinois, with an average temperature ranging between max 32.9°F (0.5°C) and min 22.8°F (-5.1°C).Temperature
Rochelle in December demonstrates a small temperature transition, adjusting from an average high of a chilly 45.3°F (7.4°C) in November to a cold 32.9°F (0.5°C). Rochelle experiences a consistent average temperature of 22.8°F (-5.1°C) throughout the nights in December.Humidity
The average relative humidity in December is 83%.Rainfall
In Rochelle, during December, the rain falls for 6.2 days and regularly aggregates up to 0.71" (18mm) of precipitation. In Rochelle, during the entire year, the rain falls for 124.5 days and collects up to 14.49" (368mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Rochelle. In Rochelle, during December, snow falls for 7.7 days and regularly aggregates up to 0.87" (22mm) of snow. Throughout the year, there are 37.1 snowfall days, and 6.14" (156mm) 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 7:05 am and sunset at 4:25 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:35 pm CST.
Sunshine
The average sunshine in December is 3.9h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: The UV index of 1 during December translates into the following guidance:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rochelle, IL
- Average high temperature in December: 32.9°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in December: 22.8°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).
Average pressure in December
Rochelle, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Rochelle, IL
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Rochelle, IL
- Average humidity in December: 83%
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Rochelle, IL
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in December
Rochelle, IL
- Average rainfall days in December: 6.2 days
The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in December
Rochelle, IL
- Average snowfall in December: 0.87"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Rochelle, IL
- Average snowfall days in December: 7.7 days
The month with the highest number of snowfall days is January (10.3 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
Rochelle, IL
- Average daylight in December: 9h and 12min
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: 3h and 54min
The month with the most sunshine is June (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Rochelle, IL
- Average sunshine days in December: 18.4 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Rochelle, IL
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Rochelle, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in December
Rochelle, IL
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
