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
Arrival of December comes with a reduction in the average high-temperature, falling from a frosty 43.7°F (6.5°C) in November to a freezing cold 31.1°F (-0.5°C). During December, the average low-temperature in Richmond is 21.2°F (-6°C).Humidity
The average relative humidity in December in Richmond is 83%.Rainfall
The months with the least rainfall are January, February and December Rain falls for 6.3 days and accumulates 0.83" (21mm) of rain.Snowfall
Months with snowfall are January through May, October through December. In Richmond, in December, during 9.7 snowfall days, 1.89" (48mm) of snow is typically accumulated. In Richmond, during the entire year, snow falls for 46.5 days and aggregates up to 12.95" (329mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Richmond.On the first day of December, sunrise is at 7:03 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:30 pm CST.
Sunshine
The average sunshine in December is 3.9h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Richmond. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Frequently asked questions
How cold is it in Richmond in December?
What is the average humidity in December in Richmond?
What is the driest month in Richmond?
How much does it rain in Richmond in December?
How many days does it snow in December in Richmond?
What is the month with the shortest days in Richmond?
How many hours of daylight does Richmond have in December?
When are sunrise and sunset in December in Richmond?
How many hours of sunshine does Richmond have in December?
What are the months with the lowest UV index in Richmond?
How high is the UV index in December in Richmond?
Average temperature in December
Richmond, IL
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.4°F).
- Average low temperature in December: 21.2°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in December
Richmond, 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 (29.91"Hg).
Average wind speed in December
Richmond, IL
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Richmond, IL
- Average humidity in December: 83%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Richmond, IL
- Average rainfall in December: 0.83"
The wettest month (with the highest rainfall) is June (2.87").
The driest months (with the least rainfall) are January, February and December (0.83").
Average rainfall days in December
Richmond, IL
- Average rainfall days in December: 6.3 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in December
Richmond, IL
- Average snowfall in December: 1.89"
The month with the highest snowfall is January (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Richmond, IL
- Average snowfall days in December: 9.7 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Richmond, 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 6min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Richmond, IL
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
Richmond, IL
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Richmond, IL
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in December
Richmond, 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).
Richmond, Illinois, USA
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