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
Stepping into December, Morrison observes a temperature decline, with the average high falling from November's frosty 45.5°F (7.5°C) to an icy 33.6°F (0.9°C). Morrison witnesses an average low-temperature of 23°F (-5°C) throughout the month of December.Humidity
In December, the average relative humidity is 82%.Rainfall
In Morrison, Illinois, during December, the rain falls for 7.3 days and regularly aggregates up to 1.26" (32mm) of precipitation. In Morrison, during the entire year, the rain falls for 145.1 days and collects up to 27.2" (691mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Morrison, during December, snow falls for 9.7 days and regularly aggregates up to 3.11" (79mm) of snow. Throughout the year, in Morrison, there are 42.3 snowfall days, and 15.59" (396mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Morrison.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, in Morrison, sunrise is at 7:27 am and sunset at 4:39 pm CST.
Sunshine
In Morrison, 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 value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average UV index of 2 in December transforms into this advice:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
How cold is it in Morrison in December?
What is the average humidity in December in Morrison?
How many days does it rain in December in Morrison?
How much does it snow in Morrison in December?
What is the month with the shortest days in Morrison?
What is the average length of the day in December in Morrison?
When are sunrise and sunset in December in Morrison?
How many hours of sunshine does Morrison have in December?
How high is the UV index in December in Morrison?
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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