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 shift into December brings a noticeable decrease in the average high-temperature, falling from a cold 37.9°F (3.3°C) in November to a freezing cold 23.4°F (-4.8°C). During December, the average low-temperature is an extreme cold 12.7°F (-10.7°C).Humidity
In Lewis, the average relative humidity in December is 90%.Rainfall
In Lewis, in December, during 3.9 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Lewis, during the entire year, the rain falls for 122.5 days and collects up to 20.87" (530mm) of precipitation.Snowfall
Months with snowfall in Lewis are January through May, October through December. December is the month with the most snowfall. Snow falls for 15.2 days and accumulates 5.47" (139mm) of snow.Daylight
December has the shortest days of the year in Lewis, Wisconsin, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 7:30 am and sunset at 4:27 pm. On the last day of December, in Lewis, sunrise is at 7:50 am and sunset at 4:35 pm CST.
Sunshine
In Lewis, Wisconsin, the average sunshine in December is 2.8h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Lewis. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A daily high UV index of 1 in December leads to these guidelines:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Lewis?
What is the average humidity in December in Lewis?
How much does it rain in Lewis in December?
What is the snowiest month in Lewis?
How much does it snow in Lewis in December?
What is the month with the shortest days in Lewis?
How many hours of daylight does Lewis have in December?
When are sunrise and sunset in December in Lewis?
How long on average sun shines in December in Lewis?
What is the month with the lowest UV index in Lewis?
What is the UV index reading in December in Lewis?
Average temperature in December
Lewis, WI
- Average high temperature in December: 23.4°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (17.8°F).
- Average low temperature in December: 12.7°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (4.8°F).
Average pressure in December
Lewis, WI
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Lewis, WI
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).
Average humidity in December
Lewis, WI
- Average humidity in December: 90%
The month with the highest relative humidity is January (92%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in December
Lewis, WI
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
Lewis, WI
- Average rainfall days in December: 3.9 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is January (2.3 days).
Average snowfall in December
Lewis, WI
- Average snowfall in December: 5.47"
The month with the highest snowfall is December (5.47").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lewis, WI
- Average snowfall days in December: 15.2 days
The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Lewis, WI
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 2h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in December
Lewis, WI
- Average sunshine days in December: 13.8 days
The month with the most sunshine days is October (16.3 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
Lewis, WI
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Lewis, WI
- Average cloud cover in December: 70
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in December
Lewis, WI
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
Lewis, Wisconsin, USA
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