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
The arrival of December signals a shift in temperature, down from a frosty 47.1°F (8.4°C) in November to a wintry 35.4°F (1.9°C). December nights cool down to an average low-temperature of 25.3°F (-3.7°C).Humidity
The average relative humidity in December in Morris is 82%.Rainfall
In Morris, Illinois, during December, the rain falls for 8.9 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Morris, during the entire year, the rain falls for 167.3 days and collects up to 35.83" (910mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Morris, during December, snow falls for 9 days and regularly aggregates up to 2.83" (72mm) of snow. Throughout the year, there are 42.7 snowfall days, and 16.69" (424mm) of snow is accumulated.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 7:00 am and sunset at 4:25 pm. On the last day of December, in Morris, sunrise is at 7:19 am and sunset at 4:34 pm CST.
Sunshine
In December, the average sunshine is 4.3h.UV index
In Morris, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Enhance your sun protection with tightly woven, yet airy clothing. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
How cold is it in Morris in December?
What is the average humidity in December in Morris?
How much does it rain in Morris in December?
How many days does it snow in December in Morris?
What is the month with the shortest days in Morris?
How many hours of daylight does Morris have in December?
When is the sunrise / sunset in December in Morris?
How long on average sun shines in December in Morris?
What is the UV index reading in December in Morris?
Average temperature in December
Morris, IL
- Average high temperature in December: 35.4°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 (29.3°F).
- Average low temperature in December: 25.3°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in December
Morris, 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 (29.92"Hg).
Average wind speed in December
Morris, IL
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Morris, IL
- Average humidity in December: 82%
The months with the highest relative humidity are July and August (84%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Morris, IL
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is May (4.96").
The driest month (with the least rainfall) is November (1.73").
Average rainfall days in December
Morris, IL
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is July (20 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in December
Morris, IL
- Average snowfall in December: 2.83"
The month with the highest snowfall is February (4.8").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Morris, IL
- Average snowfall days in December: 9 days
The month with the highest number of snowfall days is January (12.4 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
Morris, IL
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Morris, IL
- Average sunshine days in December: 14.9 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is July (7.3 days).
Average UV index in December
Morris, IL
- Average UV index in December: 2
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Morris, IL
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in December
Morris, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Morris, Illinois, USA
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