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 onset of December results in a decrease in the average high-temperature, receding from a frosty 45°F (7.2°C) in November to a cold 32.7°F (0.4°C). An average nighttime temperature of 22.5°F (-5.3°C) is noted during the month of December.Humidity
The average relative humidity in December is 83%.Rainfall
In Polo, in December, it is raining for 7.3 days, with typically 1.69" (43mm) of accumulated precipitation. Throughout the year, there are 152.3 rainfall days, and 32.6" (828mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Polo. In December, it is snowing for 8.9 days. Throughout December, 2.87" (73mm) of snow is accumulated. Throughout the year, there are 44 snowfall days, and 18.5" (470mm) of snow is accumulated.Daylight
December has the shortest days of the year in Polo, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:07 am and sunset at 4:27 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:37 pm CST.
Sunshine
The average sunshine in December is 3.9h.UV index
The months with the lowest UV index in Polo are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.Note: An average UV index of 1 in December transforms into this advice:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Polo have in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Polo, IL
- Average high temperature in December: 32.7°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (26.6°F).
- Average low temperature in December: 22.5°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 (14.2°F).
Average pressure in December
Polo, IL
- Average pressure in December: 30.1"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
Polo, IL
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Polo, IL
- Average humidity in December: 83%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Polo, IL
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is January (1.54").
Average rainfall days in December
Polo, IL
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in December
Polo, IL
- Average snowfall in December: 2.87"
The month with the highest snowfall is January (5.43").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Polo, IL
- Average snowfall days in December: 8.9 days
The month with the highest number of snowfall days is January (11.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Polo, 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: 3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Polo, IL
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (8.5 days).
Average UV index in December
Polo, 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
Polo, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in December
Polo, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Polo, Illinois, USA
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