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
In Silverton, December records the lowest average temperatures, peaking at 44.4°F (6.9°C) and reaching a low of 34.2°F (1.2°C).Humidity
In December, the average relative humidity in Silverton is 85%.Rainfall
December is the month with the most rainfall. Rain falls for 18.6 days and accumulates 4.45" (113mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Silverton, during December, snow falls for 0.9 days and regularly aggregates up to 0.55" (14mm) of snow. Throughout the year, there are 6.2 snowfall days, and 3.74" (95mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 7:29 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:49 am and sunset at 4:39 pm PST.
Sunshine
In December, the average sunshine is 4.3h.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 estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum UV index, 2 during December, leads to the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is December?
What is the average humidity in December?
What is the wettest month?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Silverton have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Silverton have in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Silverton, OR
- Average high temperature in December: 44.4°F
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (44.4°F).
- Average low temperature in December: 34.2°F
The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure in December
Silverton, 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
Silverton, OR
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is January (5.9mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in December
Silverton, 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
Silverton, OR
- Average rainfall in December: 4.45"
The wettest month (with the highest rainfall) is December (4.45").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in December
Silverton, OR
- Average rainfall days in December: 18.6 days
The month with the highest number of rainy days is March (20.4 days).
The month with the least rainy days is August (4.3 days).
Average snowfall in December
Silverton, OR
- Average snowfall in December: 0.55"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Silverton, OR
- Average snowfall days in December: 0.9 days
The month with the highest number of snowfall days is February (2.4 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
Silverton, 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: 4h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in December
Silverton, OR
- Average sunshine days in December: 10.9 days
The month with the most sunshine days is July (25.5 days).
The month with the least sunshine days is February (8.5 days).
Average UV index in December
Silverton, 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
Silverton, OR
- Average cloud cover in December: 56
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in December
Silverton, 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).
Silverton, Oregon, USA
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