December weather forecast
Ankeny, IA

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Weather in December

December marks the arrival of winter in Ankeny, Iowa, bringing the year to a close under a white blanket of snow. The plummeting temperature combined with a humble snowfall of 1.97" (50mm) on average gives the city a frosty ambiance. The holiday season enhances the charm of this snowy period with beautifully decorated indoor comforts. Short daylight hours fast-track the advent of cold nights, yet festive warm lights adorn the cityscape. December in Ankeny paints a whimsical winter portrait turning it into a winter wonderland.

Temperature

December in Ankeny is characterized by a reduction in the average high-temperature, from a chilly 46.8°F (8.2°C) in November to a wintry 34°F (1.1°C). In the month of December, Ankeny records a consistent average low-temperature of 22.1°F (-5.5°C).

Humidity

The average relative humidity in December is 79%.

Rainfall

In Ankeny, in December, it is raining for 5.2 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, in Ankeny, there are 129.8 rainfall days, and 25.91" (658mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Ankeny, during December, snow falls for 7.7 days and regularly aggregates up to 1.97" (50mm) of snow. Throughout the year, in Ankeny, there are 36.2 snowfall days, and 13.94" (354mm) of snow is accumulated.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:22 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:41 am and sunset at 4:54 pm CST.

Sunshine

In December, the average sunshine is 4.7h.

UV index

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Ankeny. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 2 suggests this advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Around midday, solar radiation is most harmful; hence, exposure should be limited. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
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Frequently asked questions

How cold is it in Ankeny in December?

In Ankeny, in December, the average high-temperature is 34°F (1.1°C), and the average low-temperature is 22.1°F (-5.5°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 86°F (30°C).

What is the average humidity in December in Ankeny?

The average relative humidity in December in Ankeny, Iowa, is 79%.

How many days does it rain in December in Ankeny?

In Ankeny, Iowa, in December, it is raining for 5.2 days, with typically 1.26" (32mm) of accumulated precipitation.

How much does it snow in Ankeny in December?

In Ankeny, Iowa, during December, snow falls for 7.7 days and regularly aggregates up to 1.97" (50mm) of snow.

What is the month with the shortest days in Ankeny?

The month with the shortest days is December, with an average of 9h and 12min of daylight.

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

In Ankeny, Iowa, the average day length in December is 9h and 13min.

What time are sunrise and sunset in December in Ankeny?

On the first day of December in Ankeny, Iowa, sunrise is at 7:22 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 4:54 pm CST.

How long on average sun shines in December in Ankeny?

In Ankeny, Iowa, the average sunshine duration in December is 4.7h.

What are the months with the lowest UV index in Ankeny?

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

What is the UV index intensity in December in Ankeny?

In Ankeny, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability 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
Ankeny, IA

Average temperature in December - Ankeny, IA
  • Average high temperature in December: 34°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (27.7°F).

  • Average low temperature in December: 22.1°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).

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Average pressure in December
Ankeny, IA

Average pressure in December - Ankeny, IA
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in December
Ankeny, IA

Average wind speed in December - Ankeny, IA
  • Average wind speed in December: 9.8mph

The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

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Average humidity in December
Ankeny, IA

Average humidity in December - Ankeny, IA
  • Average humidity in December: 79%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in December
Ankeny, IA

Average rainfall in December - Ankeny, IA
  • Average rainfall in December: 1.26"

The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is January (0.94").

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Average rainfall days in December
Ankeny, IA

Average rainfall days in December - Ankeny, IA
  • Average rainfall days in December: 5.2 days

The month with the highest number of rainy days is June (17.2 days).
The month with the least rainy days is February (3.7 days).

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Average snowfall in December
Ankeny, IA

Average snowfall in December - Ankeny, IA
  • Average snowfall in December: 1.97"

The month with the highest snowfall is February (4.17").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Ankeny, IA

Average snowfall days in December - Ankeny, IA
  • Average snowfall days in December: 7.7 days

The month with the highest number of snowfall days is January (9.8 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
Ankeny, IA

Average daylight in December / Average sunshine in December - Ankeny, IA
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

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Average sunshine days in December
Ankeny, IA

Average sunshine days in December - Ankeny, IA
  • Average sunshine days in December: 18.7 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is June (11 days).

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Average UV index in December
Ankeny, IA

Average UV index in December - Ankeny, IA
  • Average UV index in December: 2

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

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Average cloud cover in December
Ankeny, IA

Average cloud cover in December - Ankeny, IA
  • Average cloud cover in December: 50

The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and September (Cloud cover 29).

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Average visibility in December
Ankeny, IA

Average visibility in December - Ankeny, IA
  • Average visibility in December: 6mi

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

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Ankeny, Iowa, USA

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