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 Randolph, Illinois, enters December, the average high-temperature decreases from the a frosty 48.4°F (9.1°C) of November to a cold 37°F (2.8°C). Throughout December, Randolph anticipates an average low-temperature of 27°F (-2.8°C).Humidity
The average relative humidity in December is 80%.Rainfall
The month with the least rainfall is December, when the rain falls for 7.4 days and typically collects 0.67" (17mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 5.2 days. Throughout December, 0.59" (15mm) of snow is accumulated. Throughout the year, there are 25.3 snowfall days, and 5.28" (134mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:39 pm CST.
Sunshine
In Randolph, the average sunshine in December is 4.4h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 2 during December leads to these instructions:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
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?
What is the driest month?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December in Randolph?
How many hours of sunshine does Randolph have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Randolph, IL
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in December: 27°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Randolph, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Randolph, IL
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Randolph, IL
- Average humidity in December: 80%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Randolph, IL
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is May (1.69").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in December
Randolph, IL
- Average rainfall days in December: 7.4 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in December
Randolph, IL
- Average snowfall in December: 0.59"
The month with the highest snowfall is January (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Randolph, IL
- Average snowfall days in December: 5.2 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Randolph, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Randolph, IL
- Average sunshine days in December: 19.8 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is May (11.7 days).
Average UV index in December
Randolph, IL
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Randolph, IL
- Average cloud cover in December: 54
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 31).
Average visibility in December
Randolph, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Randolph, Illinois, USA
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