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 43.7°F (6.5°C) in November to a subzero cold 31.5°F (-0.3°C). In the month of December, the average temperature in Apple River dips to a still freezing cold 21.2°F (-6°C) during the night.Humidity
In Apple River, the average relative humidity in December is 83%.Rainfall
In Apple River, during December, the rain falls for 6.5 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Apple River, during the entire year, the rain falls for 140.7 days and collects up to 24.09" (612mm) of precipitation.Snowfall
Months with snowfall in Apple River are January through April, October through December. In Apple River, during December, snow falls for 10.6 days and regularly aggregates up to 2.95" (75mm) of snow. Throughout the year, there are 49.5 snowfall days, and 14.76" (375mm) of snow is accumulated.Daylight
December has the shortest days of the year in Apple River, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:11 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:37 pm CST.
Sunshine
The average sunshine in December is 3.9h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In December, the UV index of 1 transforms into the following advice:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
How cold is it in Apple River in December?
What is the average humidity in December in Apple River?
How many days does it rain in December in Apple River?
How much does it snow in Apple River in December?
What is the month with the shortest days in Apple River?
What is the average length of the day in December in Apple River?
What time are sunrise and sunset in December in Apple River?
How long on average sun shines in December in Apple River?
What are the months with the lowest UV index in Apple River?
What is the UV index reading in December in Apple River?
Average temperature in December
Apple River, IL
- Average high temperature in December: 31.5°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.8°F).
- Average low temperature in December: 21.2°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in December
Apple River, IL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Apple River, IL
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in December
Apple River, IL
- Average humidity in December: 83%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April, October and November (77%).
Average rainfall in December
Apple River, IL
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is June (3.54").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in December
Apple River, IL
- Average rainfall days in December: 6.5 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 (4.5 days).
Average snowfall in December
Apple River, IL
- Average snowfall in December: 2.95"
The month with the highest snowfall is January (3.82").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Apple River, IL
- Average snowfall days in December: 10.6 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Apple River, 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 6min).
- Average sunshine in December: 3h and 5min
The months with the most sunshine are July and August (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Apple River, IL
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in December
Apple River, IL
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Apple River, IL
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in December
Apple River, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Apple River, Illinois, USA
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