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 transition into December is accompanied by a temperature decrease, with the average high-temperature shifting from a chilly 49.8°F (9.9°C) in November to a cold 38.3°F (3.5°C). During December nights, Niantic records an average temperature of 27.5°F (-2.5°C).Humidity
In December, the average relative humidity in Niantic is 79%.Rainfall
The month with the least rainfall is December, when the rain falls for 8.3 days and typically collects 1.1" (28mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Niantic. In Niantic, in December, snow falls for 6.7 days, with typically accumulated 1.02" (26mm) of snow. Throughout the year, in Niantic, there are 29.7 snowfall days, and 7.13" (181mm) 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 6:59 am and sunset at 4:32 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:42 pm CST.
Sunshine
In December, the average sunshine in Niantic, Illinois, is 4.5h.UV index
The average daily maximum UV index in December in Niantic, Illinois, is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
Is December cold in Niantic?
What is the average humidity in December in Niantic?
What is the driest month in Niantic?
How many days does it rain in December in Niantic?
How much does it snow in Niantic in December?
What is the month with the shortest days in Niantic?
How many hours of daylight does Niantic have in December?
When is the sunrise / sunset in December in Niantic?
How long on average sun shines in December in Niantic?
What is the UV index reading in December in Niantic?
Average temperature in December
Niantic, IL
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in December
Niantic, IL
- Average pressure in December: 30.12"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
Niantic, IL
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in December
Niantic, 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
Niantic, IL
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days in December
Niantic, IL
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is May (17 days).
The months with the least rainy days are January and February (6.3 days).
Average snowfall in December
Niantic, IL
- Average snowfall in December: 1.02"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Niantic, IL
- Average snowfall days in December: 6.7 days
The month with the highest number of snowfall days is January (9.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Niantic, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Niantic, IL
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in December
Niantic, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Niantic, IL
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are June and September (Cloud cover 31).
Average visibility in December
Niantic, 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).
Niantic, Illinois, USA
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