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
December brings the lowest temperatures, with an average high of 44.6°F (7°C) and an average low of 34.2°F (1.2°C).Humidity
The average relative humidity in December is 85%.Rainfall
December is the month with the most rainfall. Rain falls for 18.2 days and accumulates 4.57" (116mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Marion, during December, snow falls for 1.1 days and regularly aggregates up to 0.59" (15mm) of snow. Throughout the year, there are 7.7 snowfall days, and 5.59" (142mm) of snow is accumulated.Daylight
December has the shortest days of the year in Marion, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:29 am and sunset at 4:32 pm. On the last day of December, sunrise is at 7:48 am and sunset at 4:41 pm PST.
Sunshine
In December, the average sunshine is 4.4h.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 value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Around midday, solar radiation is most harmful; hence, exposure should be limited. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
Is it cold during December?
What is the average humidity in December?
What is the rainiest month?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Marion, OR
- Average high temperature in December: 44.6°F
The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is December (44.6°F).
- Average low temperature in December: 34.2°F
The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure in December
Marion, OR
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
Marion, OR
- Average wind speed in December: 5.4mph
The windiest months (with the highest average wind speed) are January and March (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in December
Marion, OR
- Average humidity in December: 85%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is August (66%).
Average rainfall in December
Marion, OR
- Average rainfall in December: 4.57"
The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in December
Marion, OR
- Average rainfall days in December: 18.2 days
The month with the highest number of rainy days is March (20.6 days).
The month with the least rainy days is July (4.1 days).
Average snowfall in December
Marion, OR
- Average snowfall in December: 0.59"
The month with the highest snowfall is February (2.44").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Marion, OR
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is February (2.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Marion, OR
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 4h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in December
Marion, OR
- Average sunshine days in December: 11.3 days
The month with the most sunshine days is July (25.2 days).
The month with the least sunshine days is March (8.4 days).
Average UV index in December
Marion, 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
Marion, OR
- Average cloud cover in December: 55
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in December
Marion, 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, February, March, April, May, June, October, November and December (5mi).
Marion, Oregon, USA
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