December weather forecast
Red Oak, IA

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Weather in December

The first month of the winter, December, is also a wintry month in Red Oak, Iowa, with temperature in the range of an average high of 34.7°F (1.5°C) and an average low of 22.1°F (-5.5°C).

Temperature

The arrival of December corresponds with a shift in temperature, down from a chilly 48.6°F (9.2°C) in November to a cold 34.7°F (1.5°C). The mean low-temperature during December nights is a subzero cold 22.1°F (-5.5°C).

Humidity

The average relative humidity in December is 78%.

Rainfall

In Red Oak, during December, the rain falls for 4.2 days and regularly aggregates up to 0.98" (25mm) of precipitation. In Red Oak, during the entire year, the rain falls for 117.2 days and collects up to 21.77" (553mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. In December, it is snowing for 4.8 days. Throughout December, 1.65" (42mm) of snow is accumulated. In Red Oak, Iowa, during the entire year, snow falls for 26.7 days and aggregates up to 9.76" (248mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:27 am and sunset at 4:53 pm. On the last day of December, sunrise is at 7:45 am and sunset at 5:02 pm CST.

Sunshine

In December, the average sunshine is 4.9h.

UV index

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Red Oak. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily high UV index of 2 during December translates into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Updated: Aug 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

December temperatures vary between a high-temperature of 34.7°F (1.5°C) and a low-temperature of 22.1°F (-5.5°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in August is calculated to be 87.8°F (31°C).

What is the average humidity in December?

In Red Oak, the average relative humidity in December is 78%.

How much does it rain in December?

In Red Oak, during December, the rain falls for 4.2 days and regularly aggregates up to 0.98" (25mm) of precipitation.

How many days does it snow in December?

In Red Oak, in December, during 4.8 snowfall days, 1.65" (42mm) of snow is typically accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

What is the average length of the day in December?

In December, the average day length is 9h and 17min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:27 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 5:02 pm CST.

How many hours of sunshine does Red Oak have in December?

The average sunshine duration in December is 4.9h.

When is the lowest UV index?

The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2.

What is the UV index reading in December?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health threat 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
Red Oak, IA

Average temperature in December - Red Oak, IA
  • Average high temperature in December: 34.7°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (30°F).

  • Average low temperature in December: 22.1°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).

Average pressure in December
Red Oak, IA

Average pressure in December - Red Oak, IA
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed in December
Red Oak, IA

Average wind speed in December - Red Oak, IA
  • Average wind speed in December: 9.6mph

The windiest months (with the highest average wind speed) are March and April (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).

Average humidity in December
Red Oak, IA

Average humidity in December - Red Oak, IA
  • Average humidity in December: 78%

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (68%).

Average rainfall in December
Red Oak, IA

Average rainfall in December - Red Oak, IA
  • Average rainfall in December: 0.98"

The wettest month (with the highest rainfall) is June (4.06").
The driest months (with the least rainfall) are January and February (0.63").

Average rainfall days in December
Red Oak, IA

Average rainfall days in December - Red Oak, IA
  • Average rainfall days in December: 4.2 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.9 days).

Average snowfall in December
Red Oak, IA

Average snowfall in December - Red Oak, IA
  • Average snowfall in December: 1.65"

The month with the highest snowfall is January (2.68").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Red Oak, IA

Average snowfall days in December - Red Oak, IA
  • Average snowfall days in December: 4.8 days

The month with the highest number of snowfall days is January (7.9 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
Red Oak, IA

Average daylight in December / Average sunshine in December - Red Oak, IA
  • Average daylight in December: 9h and 2min

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 5min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

Average sunshine days in December
Red Oak, IA

Average sunshine days in December - Red Oak, IA
  • Average sunshine days in December: 23.1 days

The month with the most sunshine days is December (23.1 days).
The month with the least sunshine days is May (12.3 days).

Average UV index in December
Red Oak, IA

Average UV index in December - Red Oak, IA
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

Average cloud cover in December
Red Oak, IA

Average cloud cover in December - Red Oak, IA
  • Average cloud cover in December: 46

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 27).

Average visibility in December
Red Oak, IA

Average visibility in December - Red Oak, IA
  • 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).

Red Oak, Iowa, USA

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