December weather forecast
New Vienna, IA

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Weather in December

December, the first month of the winter in New Vienna, is also a subzero cold month, with an average temperature ranging between min 20.7°F (-6.3°C) and max 31.3°F (-0.4°C).

Temperature

The shift from November to December involves a decrease in the average high-temperature, from a chilly 43.7°F (6.5°C) to a freezing cold 31.3°F (-0.4°C). Throughout the month of December, New Vienna witnesses an average low-temperature of 20.7°F (-6.3°C).

Humidity

The average relative humidity in December is 83%.

Rainfall

In New Vienna, during December, the rain falls for 7.5 days and regularly aggregates up to 1.69" (43mm) of precipitation. In New Vienna, during the entire year, the rain falls for 150.8 days and collects up to 32.4" (823mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. In New Vienna, in December, during 11.3 snowfall days, 4.37" (111mm) of snow is typically accumulated. In New Vienna, during the entire year, snow falls for 53.4 days and aggregates up to 22.4" (569mm) of snow.

Daylight

With an average of 9h and 6min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:15 am and sunset at 4:32 pm. On the last day of December, sunrise is at 7:34 am and sunset at 4:41 pm CST.

Sunshine

The average sunshine in December is 4h.

UV index

The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A typical high UV index of 1 in December suggests the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Updated: Jul 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

The high-temperature during December is 31.3°F (-0.4°C) and the low-temperature is 20.7°F (-6.3°C).

What is the average humidity in December?

The average relative humidity in December is 83%.

How many days does it rain in December?

In December, the rain falls for 7.5 days. Throughout December, 1.69" (43mm) of precipitation is accumulated.

How many days does it snow in December in New Vienna?

In New Vienna, during December, snow falls for 11.3 days and regularly aggregates up to 4.37" (111mm) of snow.

What is the month with the shortest days in New Vienna?

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

What is the average length of the day in December?

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

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:15 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:41 pm CST.

How many hours of sunshine does New Vienna have in December?

In New Vienna, the average sunshine duration in December is 4h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

In December, the average daily maximum UV index is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to the Sun's UV radiation.
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
New Vienna, IA

Average temperature in December - New Vienna, IA
  • Average high temperature in December: 31.3°F

The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (24.3°F).

  • Average low temperature in December: 20.7°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).

Average pressure in December
New Vienna, IA

Average pressure in December - New Vienna, IA
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
New Vienna, IA

Average wind speed in December - New Vienna, IA
  • Average wind speed in December: 10.1mph

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 (7mph).

Average humidity in December
New Vienna, IA

Average humidity in December - New Vienna, IA
  • Average humidity in December: 83%

The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and October (76%).

Average rainfall in December
New Vienna, IA

Average rainfall in December - New Vienna, IA
  • Average rainfall in December: 1.69"

The wettest month (with the highest rainfall) is May (4.72").
The driest month (with the least rainfall) is January (1.34").

Average rainfall days in December
New Vienna, IA

Average rainfall days in December - New Vienna, IA
  • Average rainfall days in December: 7.5 days

The months with the highest number of rainy days are May and June (19.9 days).
The month with the least rainy days is February (4.3 days).

Average snowfall in December
New Vienna, IA

Average snowfall in December - New Vienna, IA
  • Average snowfall in December: 4.37"

The month with the highest snowfall is January (6.22").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
New Vienna, IA

Average snowfall days in December - New Vienna, IA
  • Average snowfall days in December: 11.3 days

The month with the highest number of snowfall days is January (14 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
New Vienna, IA

Average daylight in December / Average sunshine in December - New Vienna, IA
  • 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 July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

Average sunshine days in December
New Vienna, IA

Average sunshine days in December - New Vienna, IA
  • Average sunshine days in December: 15.5 days

The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is June (7.8 days).

Average UV index in December
New Vienna, IA

Average UV index in December - New Vienna, IA
  • Average UV index in December: 1

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

Average cloud cover in December
New Vienna, IA

Average cloud cover in December - New Vienna, IA
  • Average cloud cover in December: 59

The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 33).

Average visibility in December
New Vienna, IA

Average visibility in December - New Vienna, IA
  • Average visibility in December: 6mi

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

New Vienna, Iowa, USA

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