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
The lowest temperatures are recorded in December, with averages reaching a high of 43.7°F (6.5°C) and a low of 33.6°F (0.9°C).Humidity
January, February, November and December, with an average relative humidity of 87%, are the most humid months.Rainfall
December is the month with the most rainfall. Rain falls for 19.5 days and accumulates 3.9" (99mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Yamhill, Oregon, during December, snow falls for 0.6 days and regularly aggregates up to 0.28" (7mm) of snow. In Yamhill, during the entire year, snow falls for 5 days and aggregates up to 2.48" (63mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 7:32 am and sunset at 4:31 pm. On the last day of December, sunrise is at 7:52 am and sunset at 4:40 pm PST.
Sunshine
The average sunshine in December is 3.9h.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 estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is December?
What are the most humid months?
What is the average humidity in December?
What is the wettest month?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Yamhill have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Yamhill, OR
- Average high temperature in December: 43.7°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 (43.7°F).
- Average low temperature in December: 33.6°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).
Average pressure in December
Yamhill, OR
- Average pressure in December: 30.09"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
Yamhill, OR
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest months (with the lowest average wind speed) are August and September (4mph).
Average humidity in December
Yamhill, OR
- Average humidity in December: 87%
The months with the highest relative humidity are January, February, November and December (87%).
The month with the lowest relative humidity is August (68%).
Average rainfall in December
Yamhill, OR
- Average rainfall in December: 3.9"
The wettest month (with the highest rainfall) is December (3.9").
The driest month (with the least rainfall) is August (0.39").
Average rainfall days in December
Yamhill, OR
- Average rainfall days in December: 19.5 days
The month with the highest number of rainy days is March (21.9 days).
The months with the least rainy days are July and August (6.3 days).
Average snowfall in December
Yamhill, OR
- Average snowfall in December: 0.28"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Yamhill, OR
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is February (2 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
Yamhill, 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 42min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in December
Yamhill, OR
- Average sunshine days in December: 9.3 days
The month with the most sunshine days is July (22.3 days).
The month with the least sunshine days is March (7.4 days).
Average UV index in December
Yamhill, 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
Yamhill, OR
- Average cloud cover in December: 61
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
Yamhill, OR
- Average visibility in December: 4mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, November and December (4mi).
Yamhill, Oregon, USA
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