December weather forecast
Newton, IA

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Weather in December

December, the first month of the winter in Newton, is still a cold month, with temperature in the range of an average high of 33.8°F (1°C) and an average low of 22.1°F (-5.5°C).

Temperature

As November shifts into December, a slight alteration in temperatures is observed, with average highs reducing from a chilly 46.9°F (8.3°C) to an icy 33.8°F (1°C). An average low-temperature of 22.1°F (-5.5°C) is anticipated throughout the nights in Newton during December.

Humidity

The average relative humidity in December in Newton is 80%.

Rainfall

January, February and December are months with the least rain in Newton, Iowa, when the rain falls for 4.3 days and typically aggregates up to 0.39" (10mm) of rain.

Snowfall

Months with snowfall in Newton are January through May, October through December. In Newton, in December, snow falls for 5 days, with typically accumulated 0.51" (13mm) of snow. In Newton, during the entire year, snow falls for 28.8 days and aggregates up to 5.28" (134mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 12min of daylight.
On the first day of December, sunrise is at 7:20 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:51 pm CST.

Sunshine

The average sunshine in December is 4.7h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the UV index of 1 transforms into the following advice:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. It's recommended to limit sun exposure when its radiation is at its peak during midday. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

How cold is December in Newton?

The high-temperature, in December, in Newton, is 33.8°F (1°C), while the low-temperature averages to 22.1°F (-5.5°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 86°F (30°C).

What is the average humidity in December in Newton?

The average relative humidity in December in Newton, Iowa, is 80%.

What is the driest month in Newton?

January, February and December are months with the least rain when the rain falls for 4.3 days and typically aggregates up to 0.39" (10mm) of rain.

How much does it rain in Newton in December?

In Newton, during December, the rain falls for 4.3 days and regularly aggregates up to 0.39" (10mm) of precipitation.

How much does it snow in Newton in December?

In Newton, during December, snow falls for 5 days and regularly aggregates up to 0.51" (13mm) of snow.

What is the month with the shortest days in Newton?

December has the shortest days of the year, with an average of 9h and 12min of daylight.

How many hours of daylight does Newton have in December?

The average day length in December is 9h and 13min.

When is the sunrise / sunset in December in Newton?

In December, on the first day of the month, sunrise is at 7:20 am and sunset at 4:42 pm. On the last day of the month, in Newton, sunrise is at 7:39 am and sunset at 4:51 pm CST.

How long on average sun shines in December in Newton?

The average sunshine duration in December in Newton is 4.7h.

When is the lowest UV index in Newton?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Newton.

What is the UV index intensity in December in Newton?

The average daily maximum UV index in December in Newton is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from 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
Newton, IA

Average temperature in December - Newton, IA
  • Average high temperature in December: 33.8°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (27.1°F).

  • Average low temperature in December: 22.1°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).

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Average pressure in December
Newton, IA

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in December
Newton, IA

Average wind speed in December - Newton, IA
  • Average wind speed in December: 10mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

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Average humidity in December
Newton, IA

Average humidity in December - Newton, IA
  • Average humidity in December: 80%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in December
Newton, IA

Average rainfall in December - Newton, IA
  • Average rainfall in December: 0.39"

The wettest month (with the highest rainfall) is May (2.13").
The driest months (with the least rainfall) are January, February and December (0.39").

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Average rainfall days in December
Newton, IA

Average rainfall days in December - Newton, IA
  • Average rainfall days in December: 4.3 days

The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is February (3.4 days).

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Average snowfall in December
Newton, IA

Average snowfall in December - Newton, IA
  • Average snowfall in December: 0.51"

The month with the highest snowfall is January (1.73").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Newton, IA

Average snowfall days in December - Newton, IA
  • Average snowfall days in December: 5 days

The month with the highest number of snowfall days is January (8.4 days).
The 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
Newton, IA

Average daylight in December / Average sunshine in December - Newton, IA
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

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Average sunshine days in December
Newton, IA

Average sunshine days in December - Newton, IA
  • Average sunshine days in December: 22.9 days

The month with the most sunshine days is December (22.9 days).
The month with the least sunshine days is June (12.2 days).

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Average UV index in December
Newton, IA

Average UV index in December - Newton, IA
  • Average UV index in December: 1

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

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Average cloud cover in December
Newton, IA

Average cloud cover in December - Newton, IA
  • Average cloud cover in December: 51

The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and September (Cloud cover 30).

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Average visibility in December
Newton, IA

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

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

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Newton, Iowa, USA

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