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
With an average high-temperature of 43.9°F (6.6°C) and an average low-temperature of 34°F (1.1°C), December is the coldest month.Humidity
The months with the highest humidity in Cornelius are January, February, November and December, with an average relative humidity of 85%.Rainfall
In December, in Cornelius, the rain falls for 18.8 days. Throughout December, 4.45" (113mm) of precipitation is accumulated. Throughout the year, there are 173 rainfall days, and 29.49" (749mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In Cornelius, Oregon, in December, during 0.7 snowfall days, 0.35" (9mm) of snow is typically accumulated. In Cornelius, Oregon, during the entire year, snow falls for 6.6 days and aggregates up to 4.53" (115mm) of snow.Daylight
December has the shortest days of the year in Cornelius, with an average of 8h and 48min of daylight.On the first day of December, sunrise is at 7:32 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 4:38 pm PST.
Sunshine
In December, the average sunshine in Cornelius is 3.9h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 suggests these recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Frequently asked questions
What is the coldest time of year in Cornelius?
How cold does it get in Cornelius in December?
What are the most humid months in Cornelius?
What is the average humidity in December in Cornelius?
How many days does it rain in December in Cornelius?
How many days does it snow in December in Cornelius?
What is the month with the shortest days in Cornelius?
What is the average length of the day in December in Cornelius?
When is the sunrise / sunset in December in Cornelius?
How many hours of sunshine does Cornelius have in December?
When is the lowest UV index in Cornelius?
What is the UV index reading in December in Cornelius?
Average temperature in December
Cornelius, OR
- Average high temperature in December: 43.9°F
The warmest month (with the highest average high temperature) is August (81.5°F).
The month with the lowest average high temperature is December (43.9°F).
- Average low temperature in December: 34°F
The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is December (34°F).
Average pressure in December
Cornelius, OR
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in December
Cornelius, OR
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is March (5mph).
The calmest months (with the lowest average wind speed) are June, August and September (4.3mph).
Average humidity in December
Cornelius, OR
- Average humidity in December: 85%
The months with the highest relative humidity are January, February, November and December (85%).
The month with the lowest relative humidity is August (64%).
Average rainfall in December
Cornelius, OR
- Average rainfall in December: 4.45"
The wettest month (with the highest rainfall) is January (4.57").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in December
Cornelius, OR
- Average rainfall days in December: 18.8 days
The month with the highest number of rainy days is March (20.8 days).
The month with the least rainy days is August (4.4 days).
Average snowfall in December
Cornelius, OR
- Average snowfall in December: 0.35"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Cornelius, OR
- Average snowfall days in December: 0.7 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Cornelius, OR
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in December
Cornelius, OR
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (8.5 days).
Average UV index in December
Cornelius, OR
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Cornelius, OR
- Average cloud cover in December: 60
The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Cornelius, OR
- Average visibility in December: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January and February (4mi).
Cornelius, Oregon, USA
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