December weather forecast
Decatur, NE

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Weather in December

December, the first month of the winter in Decatur, is also a wintry month, with an average temperature fluctuating between 20.3°F (-6.5°C) and 32.2°F (0.1°C).

Temperature

December brings with it a considerable temperature decrease, with average high-temperatures dropping from November's frosty 47.3°F (8.5°C) to an icy 32.2°F (0.1°C). Throughout the month of December, the nighttime temperature in Decatur dips to an average of 20.3°F (-6.5°C).

Humidity

The average relative humidity in December is 79%.

Rainfall

In Decatur, during December, the rain falls for 3.5 days and regularly aggregates up to 1.42" (36mm) of precipitation. Throughout the year, there are 117.6 rainfall days, and 21.89" (556mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In December, in Decatur, it is snowing for 7 days. Throughout December, 2.13" (54mm) of snow is accumulated. Throughout the year, there are 32.9 snowfall days, and 11.69" (297mm) of snow is accumulated.

Daylight

The month with the shortest days in Decatur is December, with an average of 9h and 12min of daylight.
On the first day of December, sunrise is at 7:34 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 5:03 pm CST.

Sunshine

In Decatur, the average sunshine in December is 4.9h.

UV index

The months with the lowest UV index are February and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In December, the maximum UV index of 1 suggests this advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
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Frequently asked questions

How cold is December in Decatur?

During December, Decatur experiences an average high-temperature of 32.2°F (0.1°C) and a low-temperature of 20.3°F (-6.5°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, in August is estimated at 87.8°F (31°C).

What is the average humidity in December in Decatur?

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

How many days does it rain in December in Decatur?

In Decatur, during December, the rain falls for 3.5 days and regularly aggregates up to 1.42" (36mm) of precipitation.

How much does it snow in Decatur in December?

In Decatur, Nebraska, during December, snow falls for 7 days and regularly aggregates up to 2.13" (54mm) of snow.

What is the month with the shortest days in Decatur?

The month with the shortest days in Decatur is December, with an average of 9h and 12min of daylight.

What is the average length of the day in December in Decatur?

In December, the average day length in Decatur, Nebraska, is 9h and 11min.

What time are sunrise and sunset in December in Decatur?

In December, on the first day of the month, sunrise is at 7:34 am and sunset at 4:54 pm. On the last day of the month, in Decatur, sunrise is at 7:52 am and sunset at 5:03 pm CST.

How long on average sun shines in December in Decatur?

The average sunshine duration in December in Decatur is 4.9h.

What is the month with the lowest UV index in Decatur?

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

What is the UV index intensity in December in Decatur?

In Decatur, Nebraska, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability 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
Decatur, NE

Average temperature in December - Decatur, NE
  • Average high temperature in December: 32.2°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (28°F).

  • Average low temperature in December: 20.3°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 (15.1°F).

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Average pressure in December
Decatur, NE

Average pressure in December - Decatur, NE
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in December
Decatur, NE

Average wind speed in December - Decatur, NE
  • Average wind speed in December: 10mph

The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).

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Average humidity in December
Decatur, NE

Average humidity in December - Decatur, NE
  • Average humidity in December: 79%

The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are April and October (66%).

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Average rainfall in December
Decatur, NE

Average rainfall in December - Decatur, NE
  • Average rainfall in December: 1.42"

The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (0.67").

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Average rainfall days in December
Decatur, NE

Average rainfall days in December - Decatur, NE
  • Average rainfall days in December: 3.5 days

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (2.7 days).

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Average snowfall in December
Decatur, NE

Average snowfall in December - Decatur, NE
  • Average snowfall in December: 2.13"

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

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Average snowfall days in December
Decatur, NE

Average snowfall days in December - Decatur, NE
  • Average snowfall days in December: 7 days

The month with the highest number of snowfall days is January (8.9 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
Decatur, NE

Average daylight in December / Average sunshine in December - Decatur, NE
  • 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 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days in December
Decatur, NE

Average sunshine days in December - Decatur, NE
  • Average sunshine days in December: 20.7 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (12 days).

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Average UV index in December
Decatur, NE

Average UV index in December - Decatur, NE
  • Average UV index in December: 1

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

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Average cloud cover in December
Decatur, NE

Average cloud cover in December - Decatur, NE
  • Average cloud cover in December: 48

The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in December
Decatur, NE

Average visibility in December - Decatur, NE
  • Average visibility in December: 6mi

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

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Decatur, Nebraska, USA

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