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
December
Weather in December
Temperature
The onset of December introduces a moderate change in Cortland's weather, with average high-temperatures falling from November's fresh 50.9°F (10.5°C) to a cold 36.9°F (2.7°C). December brings Cortland a consistent average low-temperature of 23°F (-5°C).Humidity
In Cortland, the average relative humidity in December is 74%.Rainfall
In December, the rain falls for 3.5 days. Throughout December, 1.42" (36mm) of precipitation is accumulated. Throughout the year, there are 115.2 rainfall days, and 22.56" (573mm) of precipitation is accumulated.Snowfall
Months with snowfall in Cortland are January through May, October through December. In Cortland, Nebraska, in December, during 4.5 snowfall days, 1.73" (44mm) of snow is typically accumulated. In Cortland, during the entire year, snow falls for 22.2 days and aggregates up to 10.71" (272mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:31 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 5:10 pm CST.
Sunshine
The average sunshine in December is 5.4h.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 hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Beware! Reflection from snow can magnify the Sun's UV radiation nearly 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 in Cortland?
How much does it rain in December?
How many days does it snow in December in Cortland?
What is the month with the shortest days?
What is the average length of the day in December in Cortland?
When are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Cortland, NE
- Average high temperature in December: 36.9°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in December: 23°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in December
Cortland, 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 (29.85"Hg).
Average wind speed in December
Cortland, NE
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is April (11.4mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in December
Cortland, NE
- Average humidity in December: 74%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is October (64%).
Average rainfall in December
Cortland, NE
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in December
Cortland, NE
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in December
Cortland, NE
- Average snowfall in December: 1.73"
The month with the highest snowfall is January (2.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Cortland, NE
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is February (5.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Cortland, NE
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in December
Cortland, NE
- Average sunshine days in December: 22.3 days
The month with the most sunshine days is November (22.8 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in December
Cortland, 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
Cortland, NE
- Average cloud cover in December: 40
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in December
Cortland, 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).