December weather forecast
Yarmouth, IA

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Weather in December

The first month of the winter, December, is also a wintry month in Yarmouth, Iowa, with an average temperature varying between 35.8°F (2.1°C) and 24.6°F (-4.1°C).

Temperature

The arrival of December signals a shift in temperature, down from a chilly 47.8°F (8.8°C) in November to a wintry 35.8°F (2.1°C). Yarmouth cools down to an average low-temperature of 24.6°F (-4.1°C) throughout the month of December.

Humidity

The average relative humidity in December is 79%.

Rainfall

The month with the least rainfall in Yarmouth is December, when the rain falls for 6.5 days and typically collects 0.87" (22mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. In Yarmouth, in December, during 6.2 snowfall days, 1.1" (28mm) of snow is typically accumulated. Throughout the year, there are 32.5 snowfall days, and 9.57" (243mm) of snow is accumulated.

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 7:11 am and sunset at 4:37 pm. On the last day of December, in Yarmouth, sunrise is at 7:30 am and sunset at 4:47 pm CST.

Sunshine

In December, the average sunshine is 4.5h.

UV index

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: The daily maximum UV index of 2 in December interprets into the following advice:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

The average high-temperature, in December, in Yarmouth, is 35.8°F (2.1°C), while the average low-temperature is 24.6°F (-4.1°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is computed to be 87.8°F (31°C).

What is the average humidity in December?

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

What is the driest month?

December is the month with the least rainfall. Rain falls for 6.5 days and accumulates 0.87" (22mm) of precipitation.

How many days does it rain in December?

In December, the rain falls for 6.5 days. Throughout December, 0.87" (22mm) of precipitation is accumulated.

How much does it snow in December?

In December, it is snowing for 6.2 days. Throughout December, 1.1" (28mm) 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.

What is the average length of the day in December?

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

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:11 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:47 pm CST.

How long on average sun shines in December in Yarmouth?

In Yarmouth, the average sunshine duration in December is 4.5h.

What is the UV index intensity in December?

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
Yarmouth, IA

Average temperature in December - Yarmouth, IA
  • Average high temperature in December: 35.8°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in December: 24.6°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 (17.4°F).

Average pressure in December
Yarmouth, IA

Average pressure in December - Yarmouth, IA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
Yarmouth, IA

Average wind speed in December - Yarmouth, IA
  • Average wind speed in December: 10.1mph

The windiest months (with the highest average wind speed) are January, February, March and April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

Average humidity in December
Yarmouth, IA

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

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

Average rainfall in December
Yarmouth, IA

Average rainfall in December - Yarmouth, IA
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is December (0.87").

Average rainfall days in December
Yarmouth, IA

Average rainfall days in December - Yarmouth, IA
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (4.7 days).

Average snowfall in December
Yarmouth, IA

Average snowfall in December - Yarmouth, IA
  • Average snowfall in December: 1.1"

The month with the highest snowfall is January (3.03").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Yarmouth, IA

Average snowfall days in December - Yarmouth, IA
  • Average snowfall days in December: 6.2 days

The month with the highest number of snowfall days is January (10 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
Yarmouth, IA

Average daylight in December / Average sunshine in December - Yarmouth, 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 3min

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 12min).

Average sunshine days in December
Yarmouth, IA

Average sunshine days in December - Yarmouth, IA
  • Average sunshine days in December: 18.5 days

The months with the most sunshine days are October and December (18.5 days).
The month with the least sunshine days is June (10.5 days).

Average UV index in December
Yarmouth, IA

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

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

Average cloud cover in December
Yarmouth, IA

Average cloud cover in December - Yarmouth, IA
  • Average cloud cover in December: 52

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in December
Yarmouth, IA

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

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

Yarmouth, Iowa, USA

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