Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The start of December signals a decrease in the average high-temperature, transitioning from a cool 50.5°F (10.3°C) in November to a cold 36.9°F (2.7°C). Sumner observes an average nighttime temperature of 22.3°F (-5.4°C) during December.Humidity
In Sumner, the average relative humidity in December is 71%.Rainfall
In Sumner, in December, during 5.1 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. Throughout the year, there are 117 rainfall days, and 18.35" (466mm) of precipitation is accumulated.Snowfall
Months with snowfall 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. Throughout the year, there are 31.7 snowfall days, and 14.69" (373mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December in Sumner, 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
The average sunshine in December 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 of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Sumner have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December in Sumner?
What are the months with the lowest UV index?
What is the UV index intensity in December?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Sumner, Nebraska, USA
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