December weather forecast and climate
Des Moines, IA

City buildings in Des Moines, Iowa
City buildings in Des Moines, Iowa

Weather in December

December, the first month of the winter, in Des Moines, is still a cold month, with average temperature varying between 22.5°F (-5.3°C) and 34.2°F (1.2°C).

Temperature

In December, the average high-temperature drops, from a frosty 47.1°F (8.4°C) in November, to a cold 34.2°F (1.2°C). The average low-temperature, in December, is 22.5°F (-5.3°C).

Humidity

In December, the average relative humidity is 78%.

Rainfall

In Des Moines, during 4.1 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. In Des Moines, during the entire year, the rain falls for 114.4 days and collects up to 16.38" (416mm) of precipitation.

Snowfall

Months with snowfall in Des Moines are January through May, October through December. In Des Moines, in December, snow falls for 5.7 days, with typically accumulated 0.91" (23mm) of snow. Throughout the year, there are 30.9 snowfall days, and 7.36" (187mm) of snow is accumulated.

Daylight

The month with the shortest days in Des Moines, Iowa, is December, with an average of 9.2h of daylight.

Sunshine

In Des Moines, Iowa, the average sunshine is 4.7h.

UV index

In Des Moines, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Des Moines?

In Des Moines, in December, the average high-temperature is 34.2°F (1.2°C), and the average low-temperature is 22.5°F (-5.3°C).

What is the average humidity in December in Des Moines?

In December, the average relative humidity in Des Moines is 78%.

How many days does it rain in December in Des Moines?

In Des Moines, Iowa, in December, it is raining for 4.1 days, with typically 0.55" (14mm) of accumulated precipitation.

How much does it snow in Des Moines in December?

In December, in Des Moines, it is snowing for 5.7 days. Throughout December, 0.91" (23mm) of snow is accumulated.

What is the month with the shortest days in Des Moines?

With an average of 9.2h of daylight, December has the shortest days of the year in Des Moines.

How many hours of daylight does Des Moines have in December?

In December, the average length of the day in Des Moines is 9.2h.

How many hours of sunshine does Des Moines have in December?

In Des Moines, the average sunshine in December is 4.7h.

What is the UV index intensity in December in Des Moines?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health threat from unsafe exposure to the Sun's UV rays.

Average temperature in December
Des Moines, IA

Average temperature in December - Des Moines, IA
  • Average high temperature in December: 34.2°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in December: 22.5°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).

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Average pressure in December
Des Moines, IA

Average pressure in December - Des Moines, IA
  • Average pressure in December: 30.12"

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

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Average wind speed in December
Des Moines, IA

Average wind speed in December - Des Moines, IA
  • Average wind speed in December: 9.9mph

The windiest months (with the highest average wind speed) are January, February, March and April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

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Average humidity in December
Des Moines, IA

Average humidity in December - Des Moines, IA
  • Average humidity in December: 78%

Months with the highest relative humidity are January and June (82%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in December
Des Moines, IA

Average rainfall in December - Des Moines, IA
  • Average rainfall in December: 0.55"

The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is January (0.47").

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Average rainfall days in December
Des Moines, IA

Average rainfall days in December - Des Moines, IA
  • Average rainfall days in December: 4.1 days

The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (3 days).

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Average snowfall in December
Des Moines, IA

Average snowfall in December - Des Moines, IA
  • Average snowfall in December: 0.91"

The month with the highest snowfall is January (2.24").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Des Moines, IA

Average snowfall days in December - Des Moines, IA
  • Average snowfall days in December: 5.7 days

The month with the highest number of snowfall days is January (8.7 days).
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
Des Moines, IA

Average daylight in December / Average sunshine in December - Des Moines, IA
  • Average daylight in December: 9.2h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in December: 4.7h

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 4.3h).

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Average sunshine days in December
Des Moines, IA

Average sunshine days in December - Des Moines, IA
  • Average sunshine days in December: 22.3 days

The month with the most sunshine days is December (22.3 days).
The month with the least sunshine days is June (12.2 days).

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Average UV index in December
Des Moines, IA

Average UV index in December - Des Moines, IA
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in December
Des Moines, IA

Average cloud cover in December - Des Moines, IA
  • Average cloud cover in December: 50

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

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Average visibility in December
Des Moines, IA

Average visibility in December - Des Moines, IA
  • Average visibility in December: 6mi

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

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