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
Alexander's weather in December involves a decrease in the average high-temperature, moving down from November's fresh 50.7°F (10.4°C) to a wintry 39°F (3.9°C). December nights in Alexander cool down to an average low-temperature of 28°F (-2.2°C).Humidity
In December, the average relative humidity in Alexander is 78%.Rainfall
February and December are months with the least rain in Alexander, Illinois, when the rain falls for 6 days and typically aggregates up to 0.79" (20mm) of rain.Snowfall
January through April, November and December are months with snowfall in Alexander. In Alexander, in December, snow falls for 4.7 days, with typically accumulated 0.75" (19mm) of snow. Throughout the year, there are 23.2 snowfall days, and 4.45" (113mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:02 am and sunset at 4:36 pm. On the last day of December, in Alexander, Illinois, sunrise is at 7:21 am and sunset at 4:45 pm CST.
Sunshine
The average sunshine in December is 4.7h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: In December, a regular UV index of 2 translates into these guidelines:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Alexander?
What is the average humidity in December in Alexander?
What is the driest month in Alexander?
How much does it rain in Alexander in December?
How many days does it snow in December in Alexander?
What is the month with the shortest days in Alexander?
How many hours of daylight does Alexander have in December?
What time are sunrise and sunset in December in Alexander?
How many hours of sunshine does Alexander have in December?
When is the lowest UV index in Alexander?
How high is the UV index in December in Alexander?
Average temperature in December
Alexander, IL
- Average high temperature in December: 39°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in December
Alexander, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Alexander, IL
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in December
Alexander, IL
- Average humidity in December: 78%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Alexander, IL
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is June (2.36").
The driest months (with the least rainfall) are February and December (0.79").
Average rainfall days in December
Alexander, IL
- Average rainfall days in December: 6 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in December
Alexander, IL
- Average snowfall in December: 0.75"
The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Alexander, IL
- Average snowfall days in December: 4.7 days
The month with the highest number of snowfall days is January (7.6 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
Alexander, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Alexander, IL
- Average sunshine days in December: 20.2 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in December
Alexander, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Alexander, IL
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
Alexander, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Alexander, Illinois, USA
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