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 the transition to December, Waterman observes a drop in the average high-temperature, moving from a chilly 45.5°F (7.5°C) in November to a wintry 34.2°F (1.2°C). During December, Waterman witnesses a consistent average low-temperature of 23.9°F (-4.5°C).Humidity
The average relative humidity in December in Waterman is 83%.Rainfall
The months with the least rainfall in Waterman are November and December Rain falls for 8 days and accumulates 1.69" (43mm) of rain.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 8.3 days. Throughout December, 2.64" (67mm) of snow is accumulated. In Waterman, during the entire year, snow falls for 42.1 days and aggregates up to 17.48" (444mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Waterman.On the first day of December in Waterman, sunrise is at 7:03 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:34 pm CST.
Sunshine
In December, the average sunshine in Waterman is 4.1h.UV index
The months with the lowest UV index in Waterman are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Waterman?
What is the average humidity in December in Waterman?
What is the driest month in Waterman?
How many days does it rain in December in Waterman?
How many days does it snow in December in Waterman?
What is the month with the shortest days in Waterman?
What is the average length of the day in December in Waterman?
When is the sunrise / sunset in December in Waterman?
How long on average sun shines in December in Waterman?
What is the month with the lowest UV index in Waterman?
What is the UV index reading in December in Waterman?
Average temperature in December
Waterman, IL
- Average high temperature in December: 34.2°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in December: 23.9°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in December
Waterman, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Waterman, IL
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Waterman, IL
- Average humidity in December: 83%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Waterman, IL
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is May (4.41").
The driest months (with the least rainfall) are November and December (1.69").
Average rainfall days in December
Waterman, IL
- Average rainfall days in December: 8 days
The month with the highest number of rainy days is July (19.2 days).
The months with the least rainy days are January and February (5.3 days).
Average snowfall in December
Waterman, IL
- Average snowfall in December: 2.64"
The month with the highest snowfall is January (5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Waterman, IL
- Average snowfall days in December: 8.3 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Waterman, 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 12min).
- Average sunshine in December: 4h and 1min
The months with the most sunshine are June, July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Waterman, IL
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (8.5 days).
Average UV index in December
Waterman, IL
- Average UV index in December: 1
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Waterman, IL
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in December
Waterman, 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).
Waterman, Illinois, USA
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