December weather forecast and climate
Winterset, IA

A historic Hogback Covered Bridge in Winterset in Madison County, within Iowa
A historic Hogback Covered Bridge in Winterset in Madison County, within Iowa

Weather in December

The first month of the winter, December, is also a wintry month in Winterset, Iowa, with average temperature fluctuating between 34.3°F (1.3°C) and 22.5°F (-5.3°C).

Temperature

In December, the average high-temperature decreases, from a chilly 47.3°F (8.5°C) in November, to a cold 34.3°F (1.3°C). In Winterset, the average low-temperature is 22.5°F (-5.3°C).

Humidity

The average relative humidity in Winterset is 78%.

Rainfall

In December, the rain falls for 5.9 days. Throughout December, 1.1" (28mm) of precipitation is accumulated. Throughout the year, there are 133 rainfall days, and 26.14" (664mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Winterset. In Winterset, Iowa, in December, during 7.5 snowfall days, 1.97" (50mm) of snow is typically accumulated. Throughout the year, in Winterset, there are 35 snowfall days, and 15.04" (382mm) of snow is accumulated.

Daylight

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

Sunshine

In December, the average sunshine is 4.8h.

UV index

Months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in December in Winterset?

The average relative humidity in December is 78%.

How many days does it rain in December in Winterset?

In December, in Winterset, Iowa, the rain falls for 5.9 days. Throughout December, 1.1" (28mm) of precipitation is accumulated.

How much does it snow in Winterset in December?

In Winterset, Iowa, during December, snow falls for 7.5 days and regularly aggregates up to 1.97" (50mm) of snow.

What is the month with the shortest days in Winterset?

December has the shortest days of the year, with an average of 9.2h of daylight.

How many hours of daylight does Winterset have in December?

In December, the average length of the day in Winterset, Iowa, is 9.2h.

How long on average sun shines in December in Winterset?

In December, the average sunshine is 4.8h.

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

Months with the lowest UV index in Winterset are January, February, October through December, with an average maximum UV index of 2.

What is the UV index reading in December in Winterset?

The average daily maximum UV index in December in Winterset, Iowa, is 2. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation.

Average temperature in December
Winterset, IA

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

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in December: 22.5°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 (15.3°F).

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Average pressure in December
Winterset, IA

Average pressure in December - Winterset, 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
Winterset, IA

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

The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (7mph).

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Average humidity in December
Winterset, IA

Average humidity in December - Winterset, IA
  • Average humidity in December: 78%

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

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Average rainfall in December
Winterset, IA

Average rainfall in December - Winterset, IA
  • Average rainfall in December: 1.1"

The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is January (0.91").

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Average rainfall days in December
Winterset, IA

Average rainfall days in December - Winterset, IA
  • Average rainfall days in December: 5.9 days

The month with the highest number of rainy days is June (17.9 days).
Months with the least rainy days are January and February (3.8 days).

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Average snowfall in December
Winterset, IA

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

The month with the highest snowfall is February (4.53").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Winterset, IA

Average snowfall days in December - Winterset, IA
  • Average snowfall days in December: 7.5 days

The month with the highest number of snowfall days is January (9.1 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
Winterset, IA

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

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in December: 4.8h

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 4.4h).

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Average sunshine days in December
Winterset, IA

Average sunshine days in December - Winterset, IA
  • Average sunshine days in December: 18.6 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is June (9.8 days).

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Average UV index in December
Winterset, IA

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

Months with the highest UV index are June, July and August (UV index 6).
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
Winterset, IA

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

The month with the most cloud cover is January (Cloud cover 52).
Months with the least cloud cover are July and September (Cloud cover 29).

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Average visibility in December
Winterset, IA

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

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).

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