December weather forecast
Polen, IA

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Weather in December

The first month of the winter, December, is also a wintry month in Polen, Iowa, with an average temperature ranging between min 22.3°F (-5.4°C) and max 34.3°F (1.3°C).

Temperature

With December's onset, the average high-temperature recedes from November's frosty 47.3°F (8.5°C) to a wintry 34.3°F (1.3°C). Polen, during the nights of December, experiences an average temperature drop to a subzero cold 22.3°F (-5.4°C).

Humidity

The average relative humidity in December is 79%.

Rainfall

In Polen, in December, it is raining for 5 days, with typically 0.79" (20mm) of accumulated precipitation. In Polen, during the entire year, the rain falls for 127.7 days and collects up to 23.39" (594mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Polen, during December, snow falls for 6.5 days and regularly aggregates up to 1.69" (43mm) of snow. In Polen, during the entire year, snow falls for 32.6 days and aggregates up to 12.01" (305mm) 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 7:23 am and sunset at 4:50 pm. On the last day of December, sunrise is at 7:41 am and sunset at 4:59 pm CST.

Sunshine

The average sunshine in December is 4.8h.

UV index

In Polen, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 2 in December translates into these instructions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Experience reduced UV exposure by about half when donning a wide-brim hat. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Updated: Jun 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

The average high-temperature, in December, in Polen, is 34.3°F (1.3°C), while the average low-temperature is 22.3°F (-5.4°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is appraised at 86°F (30°C).

What is the average humidity in December?

In Polen, the average relative humidity in December is 79%.

How much does it rain in December?

In Polen, in December, it is raining for 5 days, with typically 0.79" (20mm) of accumulated precipitation.

How many days does it snow in December?

In December, it is snowing for 6.5 days. Throughout December, 1.69" (43mm) of snow is 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.

How many hours of daylight does Polen have in December?

The average day length in December is 9h and 18min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:23 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 4:59 pm CST.

How long on average sun shines in December?

The average sunshine duration in December is 4.8h.

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health threat 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
Polen, IA

Average temperature in December - Polen, IA
  • Average high temperature in December: 34.3°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (29.1°F).

  • Average low temperature in December: 22.3°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 (15.8°F).

Average pressure in December
Polen, IA

Average pressure in December - Polen, 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 (29.88"Hg).

Average wind speed in December
Polen, IA

Average wind speed in December - Polen, IA
  • Average wind speed in December: 10.3mph

The windiest months (with the highest average wind speed) are January and February (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

Average humidity in December
Polen, IA

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

The months with the highest relative humidity are January and June (82%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Polen, IA

Average rainfall in December - Polen, IA
  • Average rainfall in December: 0.79"

The wettest month (with the highest rainfall) is June (4.17").
The driest month (with the least rainfall) is January (0.75").

Average rainfall days in December
Polen, IA

Average rainfall days in December - Polen, IA
  • Average rainfall days in December: 5 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (3.7 days).

Average snowfall in December
Polen, IA

Average snowfall in December - Polen, IA
  • Average snowfall in December: 1.69"

The month with the highest snowfall is January (3.15").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Polen, IA

Average snowfall days in December - Polen, IA
  • Average snowfall days in December: 6.5 days

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Polen, IA

Average daylight in December / Average sunshine in December - Polen, 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 6min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

Average sunshine days in December
Polen, IA

Average sunshine days in December - Polen, IA
  • Average sunshine days in December: 19.4 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (10.7 days).

Average UV index in December
Polen, IA

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

The 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).

Average cloud cover in December
Polen, IA

Average cloud cover in December - Polen, IA
  • Average cloud cover in December: 48

The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are July and September (Cloud cover 30).

Average visibility in December
Polen, IA

Average visibility in December - Polen, 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).

Polen, Iowa, USA

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