December weather forecast and climate
Sumner, NE

Weather in December

December, the first month of the winter, in Sumner, is also a wintry month, with average temperature varying between 36.9°F (2.7°C) and 22.3°F (-5.4°C).

Temperature

In December, the average high-temperature drops, from a fresh 50.5°F (10.3°C) in November, to a wintry 36.9°F (2.7°C). In December, the average low-temperature is 22.3°F (-5.4°C).

Humidity

In Sumner, the average relative humidity is 71%.

Rainfall

In Sumner, 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

Months with snowfall in Sumner, Nebraska, are January through May, October through December. In Sumner, during December, snow falls for 6.2 days and regularly aggregates up to 2.91" (74mm) of snow. 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 9.3h of daylight, December has the shortest days of the year.

Sunshine

The average sunshine in Sumner, Nebraska, is 6.1h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Sumner, Nebraska. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 2 in December transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 temperature in December in Sumner?

The average high-temperature, in December, in Sumner, Nebraska, is 36.9°F (2.7°C), while the average low-temperature is 22.3°F (-5.4°C).

What is the average humidity in December in Sumner?

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

How much does it rain in Sumner in December?

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

How much does it snow in Sumner in December?

In December, in Sumner, it is snowing for 6.2 days. Throughout December, 2.91" (74mm) of snow is accumulated.

What is the month with the shortest days in Sumner?

December has the shortest days of the year in Sumner, with an average of 9.3h of daylight.

How many hours of daylight does Sumner have in December?

The average length of the day in December in Sumner, Nebraska, is 9.3h.

How long on average sun shines in December in Sumner?

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

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

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

What is the UV index reading in December in Sumner?

The average daily maximum UV index in December is 2. 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
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"

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

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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").
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).
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: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 6.1h

The month with the most sunshine is July (Average sunshine: 11.1h).
The month with the least sunshine is January (Average sunshine: 5.9h).

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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

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

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

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