December weather forecast
Lyons, WI

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Weather in December

The first month of the winter, December, is also a wintry month in Lyons, Wisconsin, with an average temperature fluctuating between 22.3°F (-5.4°C) and 32.4°F (0.2°C).

Temperature

As November shifts into December, a slight alteration in temperatures is observed, with average highs reducing from a chilly 43.7°F (6.5°C) to a cold 32.4°F (0.2°C). Lyons experiences a nighttime temperature average of 22.3°F (-5.4°C) during December.

Humidity

In Lyons, the average relative humidity in December is 82%.

Rainfall

In Lyons, Wisconsin, in December, it is raining for 8.7 days, with typically 1.61" (41mm) of accumulated precipitation. In Lyons, during the entire year, the rain falls for 158.7 days and collects up to 29.88" (759mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Lyons. In Lyons, in December, during 11.9 snowfall days, 3.46" (88mm) of snow is typically accumulated. In Lyons, during the entire year, snow falls for 56.1 days and aggregates up to 20.04" (509mm) of snow.

Daylight

The month with the shortest days in Lyons is December, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:04 am and sunset at 4:20 pm. On the last day of December, in Lyons, sunrise is at 7:23 am and sunset at 4:30 pm CST.

Sunshine

In Lyons, the average sunshine in December is 4h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum high daily UV index of 1 during December translates into the following directions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in Lyons?

Lyons in December has an average high-temperature of 32.4°F (0.2°C) and an average low-temperature of 22.3°F (-5.4°C).

What is the average humidity in December in Lyons?

In December, the average relative humidity in Lyons, Wisconsin, is 82%.

How many days does it rain in December in Lyons?

In Lyons, Wisconsin, during December, the rain falls for 8.7 days and regularly aggregates up to 1.61" (41mm) of precipitation.

How much does it snow in Lyons in December?

In December, in Lyons, Wisconsin, it is snowing for 11.9 days. Throughout December, 3.46" (88mm) of snow is accumulated.

What is the month with the shortest days in Lyons?

December has the shortest days of the year in Lyons, with an average of 9h and 6min of daylight.

What is the average length of the day in December in Lyons?

In Lyons, the average day length in December is 9h and 7min.

When is the sunrise / sunset in December in Lyons?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:20 pm. On the last day of the month, in Lyons, sunrise is at 7:23 am and sunset at 4:30 pm CST.

How many hours of sunshine does Lyons have in December?

In Lyons, Wisconsin, the average sunshine duration in December is 4h.

When is the lowest UV index in Lyons?

January and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index intensity in December in Lyons?

In Lyons, Wisconsin, the average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Lyons, WI

Average temperature in December - Lyons, WI
  • Average high temperature in December: 32.4°F

The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (25.7°F).

  • Average low temperature in December: 22.3°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).

Average pressure in December
Lyons, WI

Average pressure in December - Lyons, WI
  • Average pressure in December: 30.09"Hg

The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Lyons, WI

Average wind speed in December - Lyons, WI
  • Average wind speed in December: 9.6mph

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

Average humidity in December
Lyons, WI

Average humidity in December - Lyons, WI
  • Average humidity in December: 82%

The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April, October and November (77%).

Average rainfall in December
Lyons, WI

Average rainfall in December - Lyons, WI
  • Average rainfall in December: 1.61"

The wettest month (with the highest rainfall) is June (3.78").
The driest month (with the least rainfall) is February (1.54").

Average rainfall days in December
Lyons, WI

Average rainfall days in December - Lyons, WI
  • Average rainfall days in December: 8.7 days

The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is February (5.5 days).

Average snowfall in December
Lyons, WI

Average snowfall in December - Lyons, WI
  • Average snowfall in December: 3.46"

The month with the highest snowfall is January (5.43").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Lyons, WI

Average snowfall days in December - Lyons, WI
  • Average snowfall days in December: 11.9 days

The month with the highest number of snowfall days is January (14.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Lyons, WI

Average daylight in December / Average sunshine in December - Lyons, WI
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in December: 4h and 0min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in December
Lyons, WI

Average sunshine days in December - Lyons, WI
  • Average sunshine days in December: 13.8 days

The month with the most sunshine days is November (16 days).
The month with the least sunshine days is June (9 days).

Average UV index in December
Lyons, WI

Average UV index in December - Lyons, WI
  • Average UV index in December: 1

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in December
Lyons, WI

Average cloud cover in December - Lyons, WI
  • Average cloud cover in December: 60

The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 30).

Average visibility in December
Lyons, WI

Average visibility in December - Lyons, WI
  • Average visibility in December: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).

Lyons, Wisconsin, USA

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