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
As McCook enters December, the average high-temperature decreases from the a chilly 46.2°F (7.9°C) of November to a cold 35.2°F (1.8°C). During December, the nighttime temperature averages to a freezing cold 25.5°F (-3.6°C).Humidity
The average relative humidity in December is 80%.Rainfall
The months with the least rainfall are November and December Rain falls for 8.5 days and accumulates 1.77" (45mm) of rain.Snowfall
Months with snowfall are January through April, October through December. In McCook, in December, snow falls for 9.6 days, with typically accumulated 2.76" (70mm) of snow. In McCook, during the entire year, snow falls for 47.1 days and aggregates up to 19.02" (483mm) of snow.Daylight
The month with the shortest days in McCook is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:30 pm CST.
Sunshine
In McCook, the average sunshine in December is 4.1h.UV index
December is the month with the lowest UV index in McCook, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 1 transforms into these recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Frequently asked questions
How cold is December in McCook?
What is the average humidity in December in McCook?
What is the driest month in McCook?
How many days does it rain in December in McCook?
How many days does it snow in December in McCook?
What is the month with the shortest days in McCook?
What is the average length of the day in December in McCook?
When are sunrise and sunset in December in McCook?
How many hours of sunshine does McCook have in December?
When is the lowest UV index in McCook?
How high is the UV index in December in McCook?
Average temperature in December
McCook, IL
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in December: 25.5°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in December
McCook, IL
- Average pressure in December: 30.09"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
McCook, IL
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
McCook, IL
- Average humidity in December: 80%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
McCook, IL
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is May (4.61").
The driest months (with the least rainfall) are November and December (1.77").
Average rainfall days in December
McCook, IL
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is June (19.4 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in December
McCook, IL
- Average snowfall in December: 2.76"
The month with the highest snowfall is February (5.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
McCook, IL
- Average snowfall days in December: 9.6 days
The month with the highest number of snowfall days is January (13.3 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
McCook, 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 month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
McCook, IL
- Average sunshine days in December: 14.3 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is June (8.2 days).
Average UV index in December
McCook, IL
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
McCook, IL
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
McCook, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
McCook, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
