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
Gretna in December showcases a distinct temperature shift, moving from an average high of a chilly 49.3°F (9.6°C) in November to a wintry 34.7°F (1.5°C). Gretna reports an average nighttime low-temperature of 22.3°F (-5.4°C) in December.Humidity
The average relative humidity in December is 76%.Rainfall
In Gretna, in December, it is raining for 4.6 days, with typically 1.3" (33mm) of accumulated precipitation. Throughout the year, there are 120.7 rainfall days, and 22.87" (581mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 6.5 days. Throughout December, 1.81" (46mm) of snow is accumulated. In Gretna, Nebraska, during the entire year, snow falls for 30 days and aggregates up to 9.65" (245mm) 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 the month, sunrise is at 7:31 am and sunset at 4:57 pm. On the last day of December, in Gretna, Nebraska, sunrise is at 7:50 am and sunset at 5:06 pm CST.
Sunshine
In Gretna, Nebraska, the average sunshine in December is 5.2h.UV index
The months with the lowest UV index in Gretna are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Gretna?
What is the average humidity in December in Gretna?
How much does it rain in Gretna in December?
How much does it snow in Gretna in December?
What is the month with the shortest days in Gretna?
How many hours of daylight does Gretna have in December?
When is the sunrise / sunset in December in Gretna?
How long on average sun shines in December in Gretna?
When is the lowest UV index in Gretna?
What is the UV index reading in December in Gretna?
Average temperature in December
Gretna, NE
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 22.3°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Gretna, 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).
Average wind speed in December
Gretna, NE
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in December
Gretna, NE
- Average humidity in December: 76%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (65%).
Average rainfall in December
Gretna, NE
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is June (3.7").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days in December
Gretna, NE
- Average rainfall days in December: 4.6 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in December
Gretna, NE
- Average snowfall in December: 1.81"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Gretna, NE
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Gretna, 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: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in December
Gretna, NE
- Average sunshine days in December: 20.7 days
The month with the most sunshine days is November (22.2 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in December
Gretna, 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
Gretna, NE
- Average cloud cover in December: 43
The month with the most cloud cover is January (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in December
Gretna, 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).
Gretna, Nebraska, USA
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