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 Blue Mound, the beginning of December is marked by a lowered average high-temperature, shifting from November's fresh 50.2°F (10.1°C) to an icy 38.8°F (3.8°C). In Blue Mound, the expected average low-temperature for December is a subzero cold 28.2°F (-2.1°C).Humidity
The average relative humidity in December in Blue Mound is 79%.Rainfall
February and December are months with the least rain in Blue Mound when the rain falls for 7.7 days and typically aggregates up to 1.38" (35mm) of rain.Snowfall
January through March, November and December are months with snowfall. In Blue Mound, in December, during 4.9 snowfall days, 1.5" (38mm) of snow is typically accumulated. Throughout the year, there are 23.6 snowfall days, and 8.54" (217mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of December in Blue Mound, sunrise is at 6:58 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:42 pm CST.
Sunshine
In December, the average sunshine is 4.6h.UV index
The months with the lowest UV index in Blue Mound are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
Is December cold in Blue Mound?
What is the average humidity in December in Blue Mound?
What is the driest month in Blue Mound?
How many days does it rain in December in Blue Mound?
How many days does it snow in December in Blue Mound?
What is the month with the shortest days in Blue Mound?
What is the average length of the day in December in Blue Mound?
When are sunrise and sunset in December in Blue Mound?
How many hours of sunshine does Blue Mound have in December?
What is the month with the lowest UV index in Blue Mound?
What is the UV index intensity in December in Blue Mound?
Average temperature in December
Blue Mound, IL
- Average high temperature in December: 38.8°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Blue Mound, 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 (29.92"Hg).
Average wind speed in December
Blue Mound, IL
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in December
Blue Mound, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Blue Mound, IL
- Average rainfall in December: 1.38"
The wettest months (with the highest rainfall) are April and May (2.91").
The driest months (with the least rainfall) are February and December (1.38").
Average rainfall days in December
Blue Mound, IL
- Average rainfall days in December: 7.7 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in December
Blue Mound, IL
- Average snowfall in December: 1.5"
The month with the highest snowfall is February (2.8").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Blue Mound, IL
- Average snowfall days in December: 4.9 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, September and October (0 days).
Average daylight in December /
Average sunshine in December
Blue Mound, 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 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Blue Mound, IL
- Average sunshine days in December: 18.3 days
The month with the most sunshine days is October (19.7 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in December
Blue Mound, 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
Blue Mound, IL
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are June and September (Cloud cover 30).
Average visibility in December
Blue Mound, 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).
Blue Mound, Illinois, USA
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