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
In December, the average high-temperature goes from a chilly 45.5°F (7.5°C) in November to an icy 33.6°F (0.9°C). During the month of December, an average low-temperature of 23°F (-5°C) is recorded in Morrison.Humidity
The average relative humidity in December is 82%.Rainfall
In Morrison, in December, during 7.3 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, there are 145.1 rainfall days, and 27.2" (691mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Morrison, in December, during 9.7 snowfall days, 3.11" (79mm) of snow is typically accumulated. In Morrison, Illinois, during the entire year, snow falls for 42.3 days and aggregates up to 15.59" (396mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:08 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:27 am and sunset at 4:39 pm CST.
Sunshine
The average sunshine in December is 4.1h.UV index
In Morrison, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How much does it rain in Morrison in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Morrison have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Morrison have in December?
How high is the UV index in December?
Average temperature in December
Morrison, IL
- Average high temperature in December: 33.6°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in December: 23°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure in December
Morrison, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Morrison, IL
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Morrison, IL
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Morrison, IL
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is January (1.22").
Average rainfall days in December
Morrison, IL
- Average rainfall days in December: 7.3 days
The months with the highest number of rainy days are May and June (17.8 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in December
Morrison, IL
- Average snowfall in December: 3.11"
The month with the highest snowfall is January (4.06").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Morrison, IL
- Average snowfall days in December: 9.7 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Morrison, 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 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Morrison, IL
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
Morrison, IL
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Morrison, IL
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in December
Morrison, 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).
Morrison, Illinois, USA
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