December weather forecast
Cylinder, IA

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Weather in December

December, the first month of the winter in Cylinder, is still a freezing cold month, with an average temperature fluctuating between 17.4°F (-8.1°C) and 28°F (-2.2°C).

Temperature

The shift into December is marked by a noticeable reduction in the average high-temperature, decreasing from November's chilly 43.2°F (6.2°C) to a subzero cold 28°F (-2.2°C). Cylinder's December nights cool down to an average low-temperature of 17.4°F (-8.1°C).

Humidity

The average relative humidity in December is 84%.

Rainfall

In December, in Cylinder, Iowa, the rain falls for 4.4 days. Throughout December, 1.5" (38mm) of precipitation is accumulated. Throughout the year, there are 138 rainfall days, and 26.77" (680mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Cylinder. In Cylinder, Iowa, in December, snow falls for 11.9 days, with typically accumulated 3.74" (95mm) of snow. Throughout the year, there are 51.6 snowfall days, and 23.03" (585mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:30 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:49 am and sunset at 4:53 pm CST.

Sunshine

The average sunshine in December is 4.4h.

UV index

In December, the average daily maximum UV index in Cylinder is 2. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 2 in December translates into these instructions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Updated: Jun 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

In December, in Cylinder, the average high-temperature is 28°F (-2.2°C), and the average low-temperature is 17.4°F (-8.1°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in July is computed to be 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity in Cylinder is 84%.

How many days does it rain in December?

In Cylinder, during December, the rain falls for 4.4 days and regularly aggregates up to 1.5" (38mm) of precipitation.

How much does it snow in December?

In December, in Cylinder, Iowa, it is snowing for 11.9 days. Throughout December, 3.74" (95mm) of snow is accumulated.

What is the month with the shortest days in Cylinder?

December has the shortest days of the year, with an average of 9h and 6min of daylight.

How many hours of daylight does Cylinder have in December?

In December, the average day length is 9h and 4min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:30 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 4:53 pm CST.

How long on average sun shines in December?

In December, the average sunshine duration is 4.4h.

What is the UV index reading in December?

In Cylinder, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes 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
Cylinder, IA

Average temperature in December - Cylinder, IA
  • Average high temperature in December: 28°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (23.2°F).

  • Average low temperature in December: 17.4°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).

Average pressure in December
Cylinder, IA

Average pressure in December - Cylinder, 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).

Average wind speed in December
Cylinder, IA

Average wind speed in December - Cylinder, IA
  • Average wind speed in December: 10.6mph

The windiest months (with the highest average wind speed) are January and April (11mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).

Average humidity in December
Cylinder, IA

Average humidity in December - Cylinder, IA
  • Average humidity in December: 84%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (68%).

Average rainfall in December
Cylinder, IA

Average rainfall in December - Cylinder, IA
  • Average rainfall in December: 1.5"

The wettest month (with the highest rainfall) is June (4.25").
The driest month (with the least rainfall) is January (0.98").

Average rainfall days in December
Cylinder, IA

Average rainfall days in December - Cylinder, IA
  • Average rainfall days in December: 4.4 days

The month with the highest number of rainy days is June (20 days).
The month with the least rainy days is February (3.4 days).

Average snowfall in December
Cylinder, IA

Average snowfall in December - Cylinder, IA
  • Average snowfall in December: 3.74"

The month with the highest snowfall is February (5.91").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Cylinder, IA

Average snowfall days in December - Cylinder, IA
  • Average snowfall days in December: 11.9 days

The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Cylinder, 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 2min

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 0min).

Average sunshine days in December
Cylinder, IA

Average sunshine days in December - Cylinder, IA
  • Average sunshine days in December: 15.7 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (8.1 days).

Average UV index in December
Cylinder, IA

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

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and February (UV index 1).

Average cloud cover in December
Cylinder, IA

Average cloud cover in December - Cylinder, IA
  • Average cloud cover in December: 55

The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are July and September (Cloud cover 31).

Average visibility in December
Cylinder, IA

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

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

Cylinder, Iowa, USA

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