December weather forecast
River Hills, WI

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Weather in December

December, the first month of the winter in River Hills, is also a wintry month, with an average temperature ranging between max 32.9°F (0.5°C) and min 25°F (-3.9°C).

Temperature

Transition from November to December is accompanied by a temperature drop, with average high-temperatures decreasing from a chilly 43.7°F (6.5°C) to a cold 32.9°F (0.5°C). An average low-temperature of 25°F (-3.9°C) characterizes River Hills's December nights.

Humidity

The average relative humidity in December in River Hills is 81%.

Rainfall

December is the month with the least rainfall. Rain falls for 5.5 days and accumulates 0.71" (18mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in River Hills. In River Hills, in December, snow falls for 7.7 days, with typically accumulated 1.3" (33mm) of snow. Throughout the year, in River Hills, there are 42.5 snowfall days, and 8.23" (209mm) of snow is accumulated.

Daylight

The month with the shortest days in River Hills is December, with an average of 9h and 6min of daylight.
On the first day of December, sunrise is at 7:04 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:26 pm CST.

Sunshine

In River Hills, Wisconsin, the average sunshine in December is 4h.

UV index

The months with the lowest UV index in River Hills are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.
Note: In December, an average UV index of 1 transforms into the following instructions:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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Frequently asked questions

How cold is it in River Hills in December?

An average high-temperature, in December, in River Hills, is 32.9°F (0.5°C) and the average low-temperature is 25°F (-3.9°C).

What is the average humidity in December in River Hills?

In December, the average relative humidity in River Hills, Wisconsin, is 81%.

What is the driest month in River Hills?

December is the month with the least rainfall. Rain falls for 5.5 days and accumulates 0.71" (18mm) of precipitation.

How much does it rain in River Hills in December?

In River Hills, during December, the rain falls for 5.5 days and regularly aggregates up to 0.71" (18mm) of precipitation.

How much does it snow in River Hills in December?

In December, in River Hills, Wisconsin, it is snowing for 7.7 days. Throughout December, 1.3" (33mm) of snow is accumulated.

What is the month with the shortest days in River Hills?

The month with the shortest days is December, with an average of 9h and 6min of daylight.

How many hours of daylight does River Hills have in December?

The average day length in December in River Hills, Wisconsin, is 9h and 3min.

When is the sunrise / sunset in December in River Hills?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:17 pm. On the last day of the month, in River Hills, Wisconsin, sunrise is at 7:23 am and sunset at 4:26 pm CST.

How long on average sun shines in December in River Hills?

The average sunshine duration in December in River Hills is 4h.

What are the months with the lowest UV index in River Hills?

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

What is the UV index intensity in December in River Hills?

The average daily maximum UV index in December in River Hills, Wisconsin, is 1. A UV Index estimate of 2, and below, represents a low health threat from 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
River Hills, WI

Average temperature in December - River Hills, WI
  • Average high temperature in December: 32.9°F

The warmest month (with the highest average high temperature) is July (75.7°F).
The month with the lowest average high temperature is January (26.8°F).

  • Average low temperature in December: 25°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in December
River Hills, WI

Average pressure in December - River Hills, WI
  • Average pressure in December: 30.08"Hg

The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in December
River Hills, WI

Average wind speed in December - River Hills, WI
  • Average wind speed in December: 11.8mph

The windiest month (with the highest average wind speed) is January (12.6mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).

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Average humidity in December
River Hills, WI

Average humidity in December - River Hills, WI
  • Average humidity in December: 81%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (75%).

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Average rainfall in December
River Hills, WI

Average rainfall in December - River Hills, WI
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is December (0.71").

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Average rainfall days in December
River Hills, WI

Average rainfall days in December - River Hills, WI
  • Average rainfall days in December: 5.5 days

The months with the highest number of rainy days are May, June and July (15.2 days).
The month with the least rainy days is February (4.5 days).

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Average snowfall in December
River Hills, WI

Average snowfall in December - River Hills, WI
  • Average snowfall in December: 1.3"

The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
River Hills, WI

Average snowfall days in December - River Hills, WI
  • Average snowfall days in December: 7.7 days

The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
River Hills, WI

Average daylight in December / Average sunshine in December - River Hills, 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 months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in December
River Hills, WI

Average sunshine days in December - River Hills, WI
  • Average sunshine days in December: 18.2 days

The month with the most sunshine days is December (18.2 days).
The month with the least sunshine days is June (12.3 days).

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Average UV index in December
River Hills, WI

Average UV index in December - River Hills, 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 and December (UV index 1).

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Average cloud cover in December
River Hills, WI

Average cloud cover in December - River Hills, WI
  • Average cloud cover in December: 59

The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in December
River Hills, WI

Average visibility in December - River Hills, WI
  • Average visibility in December: 6mi

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

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River Hills, Wisconsin, USA

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