December weather forecastSmithshire, IL
December
Weather in December
The first month of the winter, December, is also an icy month in Smithshire, Illinois, with an average temperature ranging between min 24.6°F (-4.1°C) and max 35.6°F (2°C).Temperature
December involves a decrease in temperature, down from a frosty 47.5°F (8.6°C) in November to a cold 35.6°F (2°C). The nighttime temperature dips to a subzero cold 24.6°F (-4.1°C) on average during December.Humidity
In Smithshire, the average relative humidity in December is 80%.Rainfall
In Smithshire, in December, during 7.5 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Smithshire, Illinois, during the entire year, the rain falls for 149.4 days and collects up to 30.16" (766mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Smithshire, Illinois. In December, in Smithshire, it is snowing for 8.2 days. Throughout December, 2.2" (56mm) of snow is accumulated. In Smithshire, during the entire year, snow falls for 36.7 days and aggregates up to 15.31" (389mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Smithshire.On the first day of the month, sunrise is at 7:08 am and sunset at 4:36 pm. On the last day of December, in Smithshire, sunrise is at 7:27 am and sunset at 4:45 pm CST.
Sunshine
The average sunshine in December in Smithshire is 4.5h.UV index
The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Direct Sun exposure should be minimized especially during midday when radiation is most intense. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Smithshire, IL
- Average high temperature in December: 35.6°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 24.6°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 (17.6°F).
Average pressure in December
Smithshire, 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 (29.9"Hg).
Average wind speed in December
Smithshire, IL
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Smithshire, IL
- Average humidity in December: 80%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Smithshire, IL
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in December
Smithshire, IL
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Smithshire, IL
- Average snowfall in December: 2.2"
The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Smithshire, IL
- Average snowfall days in December: 8.2 days
The month with the highest number of snowfall days is January (10.9 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
Smithshire, IL
- Average daylight in December: 9h and 18min
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 30min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Smithshire, IL
- Average sunshine days in December: 16.6 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in December
Smithshire, IL
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Smithshire, IL
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
Smithshire, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
