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
Onset of December comes with a temperature decline, the average high falling from a chilly 47.3°F (8.5°C) in November to a wintry 35.6°F (2°C). In December, the recorded average low-temperature is a freezing cold 25.3°F (-3.7°C).Humidity
The average relative humidity in December is 81%.Rainfall
January and December are months with the least rain in Henry, Illinois, when the rain falls for 7.5 days and typically aggregates up to 1.57" (40mm) of rain.Snowfall
January through April, October through December are months with snowfall in Henry. In Henry, in December, snow falls for 7 days, with typically accumulated 2.28" (58mm) of snow. Throughout the year, in Henry, there are 36.7 snowfall days, and 14.09" (358mm) of snow is accumulated.Daylight
December has the shortest days of the year in Henry, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:38 pm CST.
Sunshine
In Henry, the average sunshine in December is 4.2h.UV index
In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
How cold is December in Henry?
What is the average humidity in December in Henry?
What is the driest month in Henry?
How many days does it rain in December in Henry?
How much does it snow in Henry in December?
What is the month with the shortest days in Henry?
How many hours of daylight does Henry have in December?
When are sunrise and sunset in December in Henry?
How long on average sun shines in December in Henry?
What is the UV index reading in December in Henry?
Average temperature in December
Henry, IL
- Average high temperature in December: 35.6°F
The warmest month (with the highest average high temperature) is July (81°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 (64.6°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in December
Henry, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Henry, IL
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Henry, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Henry, IL
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is May (4.41").
The driest months (with the least rainfall) are January and December (1.57").
Average rainfall days in December
Henry, IL
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in December
Henry, IL
- Average snowfall in December: 2.28"
The month with the highest snowfall is February (3.7").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Henry, IL
- Average snowfall days in December: 7 days
The month with the highest number of snowfall days is January (11.2 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
Henry, IL
- Average daylight in December: 9h and 2min
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 18min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Henry, IL
- Average sunshine days in December: 16.8 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in December
Henry, IL
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Henry, IL
- Average cloud cover in December: 55
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 32).
Average visibility in December
Henry, IL
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Henry, Illinois, USA
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