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 start of December involves a temperature drop, moving from a chilly 47.7°F (8.7°C) in November to an icy 36.5°F (2.5°C). Throughout the month of December, Roanoke witnesses an average low-temperature of 25.9°F (-3.4°C).Humidity
In Roanoke, the average relative humidity in December is 80%.Rainfall
The month with the least rainfall in Roanoke is December, when the rain falls for 7.3 days and typically collects 1.22" (31mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Roanoke, Illinois, during December, snow falls for 6.8 days and regularly aggregates up to 1.73" (44mm) of snow. In Roanoke, during the entire year, snow falls for 34.9 days and aggregates up to 11.65" (296mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:02 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:39 pm CST.
Sunshine
In December, the average sunshine in Roanoke is 4.4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Roanoke in December?
What is the average humidity in December in Roanoke?
What is the driest month in Roanoke?
How many days does it rain in December in Roanoke?
How many days does it snow in December in Roanoke?
What is the month with the shortest days in Roanoke?
How many hours of daylight does Roanoke have in December?
What time are sunrise and sunset in December in Roanoke?
How long on average sun shines in December in Roanoke?
When is the lowest UV index in Roanoke?
What is the UV index reading in December in Roanoke?
Average temperature in December
Roanoke, IL
- Average high temperature in December: 36.5°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 (30.4°F).
- Average low temperature in December: 25.9°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 (18.5°F).
Average pressure in December
Roanoke, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Roanoke, IL
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Roanoke, 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 (72%).
Average rainfall in December
Roanoke, IL
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.22").
Average rainfall days in December
Roanoke, IL
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in December
Roanoke, IL
- Average snowfall in December: 1.73"
The months with the highest snowfall are January and February (2.8").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Roanoke, IL
- Average snowfall days in December: 6.8 days
The month with the highest number of snowfall days is January (11 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
Roanoke, 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 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
Roanoke, IL
- Average sunshine days in December: 17.3 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9 days).
Average UV index in December
Roanoke, 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
Roanoke, IL
- Average cloud cover in December: 54
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in December
Roanoke, 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).
Roanoke, Illinois, USA
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