December weather forecast
Sumner, NE

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Weather in December

December, the first month of the winter in Sumner, is also an icy month, with an average temperature ranging between max 36.9°F (2.7°C) and min 22.3°F (-5.4°C).

Temperature

December brings a decrease in the average high-temperature, shifting from a cool 50.5°F (10.3°C) in November to an icy 36.9°F (2.7°C). Sumner cools down to an average low-temperature of 22.3°F (-5.4°C) throughout the month of December.

Humidity

In Sumner, the average relative humidity in December is 71%.

Rainfall

In Sumner, Nebraska, during December, the rain falls for 5.1 days and regularly aggregates up to 1.06" (27mm) of precipitation. In Sumner, during the entire year, the rain falls for 117 days and collects up to 18.35" (466mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Sumner. In Sumner, in December, during 6.2 snowfall days, 2.91" (74mm) of snow is typically accumulated. In Sumner, during the entire year, snow falls for 31.7 days and aggregates up to 14.69" (373mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:44 am and sunset at 5:10 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 5:20 pm CST.

Sunshine

In December, the average sunshine in Sumner, Nebraska, is 6.1h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 2 in December transforms into the following instructions:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Opt for tightly woven and loose clothing to enhance protection from the Sun. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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Frequently asked questions

How cold is December in Sumner?

The high-temperature in Sumner, Nebraska, during December is 36.9°F (2.7°C) and the low-temperature is 22.3°F (-5.4°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, in August is computed to be 93.2°F (34°C).

What is the average humidity in December in Sumner?

The average relative humidity in December in Sumner, Nebraska, is 71%.

How many days does it rain in December in Sumner?

In December, in Sumner, Nebraska, the rain falls for 5.1 days. Throughout December, 1.06" (27mm) of precipitation is accumulated.

How many days does it snow in December in Sumner?

In Sumner, Nebraska, during December, snow falls for 6.2 days and regularly aggregates up to 2.91" (74mm) of snow.

What is the month with the shortest days in Sumner?

December has the shortest days of the year in Sumner, Nebraska, with an average of 9h and 18min of daylight.

How many hours of daylight does Sumner have in December?

The average day length in December in Sumner is 9h and 17min.

When is the sunrise / sunset in December in Sumner?

In December, on the first day of the month, sunrise is at 7:44 am and sunset at 5:10 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 5:20 pm CST.

How many hours of sunshine does Sumner have in December?

In December, the average sunshine duration in Sumner is 6.1h.

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

The months with the lowest UV index in Sumner, Nebraska, are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Sumner?

The average daily maximum UV index in December in Sumner, Nebraska, is 2. A UV Index value of 2, and less, symbolizes a low health risk 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
Sumner, NE

Average temperature in December - Sumner, NE
  • Average high temperature in December: 36.9°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in December: 22.3°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 (21°F).

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Average pressure in December
Sumner, NE

Average pressure in December - Sumner, NE
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

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Average wind speed in December
Sumner, NE

Average wind speed in December - Sumner, NE
  • Average wind speed in December: 10.3mph

The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is July (8.8mph).

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Average humidity in December
Sumner, NE

Average humidity in December - Sumner, NE
  • Average humidity in December: 71%

The month with the highest relative humidity is January (75%).
The month with the lowest relative humidity is October (58%).

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Average rainfall in December
Sumner, NE

Average rainfall in December - Sumner, NE
  • Average rainfall in December: 1.06"

The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is January (0.51").

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Average rainfall days in December
Sumner, NE

Average rainfall days in December - Sumner, NE
  • Average rainfall days in December: 5.1 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (3.9 days).

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Average snowfall in December
Sumner, NE

Average snowfall in December - Sumner, NE
  • Average snowfall in December: 2.91"

The month with the highest snowfall is February (3.62").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Sumner, NE

Average snowfall days in December - Sumner, NE
  • Average snowfall days in December: 6.2 days

The month with the highest number of snowfall days is January (7.6 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
Sumner, NE

Average daylight in December / Average sunshine in December - Sumner, NE
  • 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: 6h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).

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Average sunshine days in December
Sumner, NE

Average sunshine days in December - Sumner, NE
  • Average sunshine days in December: 21.8 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (11.2 days).

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Average UV index in December
Sumner, NE

Average UV index in December - Sumner, NE
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Sumner, NE

Average cloud cover in December - Sumner, NE
  • Average cloud cover in December: 34

The month with the most cloud cover is February (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 22).

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Average visibility in December
Sumner, NE

Average visibility in December - Sumner, 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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Sumner, Nebraska, USA

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