December weather forecast
Newton, IA

Weather in December

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

Temperature

In December, the average high-temperature drops, from a frosty 46.9°F (8.3°C) in November, to a wintry 33.8°F (1°C). In Newton, in December, the average low-temperature is 22.1°F (-5.5°C).

Humidity

In December, the average relative humidity in Newton is 80%.

Rainfall

Months with the least rainfall in Newton are January, February and December Rain falls for 4.3 days and accumulates 0.39" (10mm) of rain.

Snowfall

Months with snowfall are January through May, October through December. In Newton, snow falls for 5 days, with typically accumulated 0.51" (13mm) of snow. Throughout the year, there are 28.8 snowfall days, and 5.28" (134mm) 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 in Newton is 4.7h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Newton. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Newton?

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

What is the driest month in Newton?

Months with the least rainfall are January, February and December Rain falls for 4.3 days and accumulates 0.39" (10mm) of rain.

How many days does it rain in December in Newton?

In Newton, Iowa, in December, during 4.3 rainfall days, 0.39" (10mm) of precipitation is typically accumulated.

How much does it snow in Newton in December?

In Newton, Iowa, in December, during 5 snowfall days, 0.51" (13mm) of snow is typically accumulated.

What is the month with the shortest days in Newton?

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

How many hours of daylight does Newton have in December?

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

How many hours of sunshine does Newton have in December?

In Newton, Iowa, the average sunshine in December is 4.7h.

When is the lowest UV index in Newton?

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

What is the UV index reading in December in Newton?

In December, the average daily maximum UV index in Newton is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in December
Newton, IA

Average temperature in December - Newton, IA
  • Average high temperature in December: 1°C

The warmest month (with the highest average high temperature) is July (27.5°C).
The month with the lowest average high temperature is January (-2.7°C).

  • Average low temperature in December: -5.5°C

The month with the highest average low temperature is July (18.2°C).
The coldest month (with the lowest average low temperature) is January (-9.8°C).

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Average pressure in December
Newton, IA

Average pressure in December - Newton, IA
  • Average pressure in December: 1019.8mbar

The month with the highest atmospheric pressure is January (1021.1mbar).
The month with the lowest atmospheric pressure is June (1012.2mbar).

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Average wind speed in December
Newton, IA

Average wind speed in December - Newton, IA
  • Average wind speed in December: 16.1km/h

The windiest month (with the highest average wind speed) is April (17km/h).
The calmest month (with the lowest average wind speed) is August (11.2km/h).

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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: 10mm

The wettest month (with the highest rainfall) is May (54mm).
The driest months (with the least rainfall) are January, February and December (10mm).

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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: 13mm

The month with the highest snowfall is January (44mm).
The months with the least snowfall are June, July, August and September (0mm).

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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: 9.2h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in December: 4.7h

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 4.2h).

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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: 9km

The month with the highest visibility is November (10km).
The months with the lowest visibility are July and August (8km).

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