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 Raleigh Hills, the lowest average temperatures are observed in December, with a high of 44.2°F (6.8°C) and a low of 34.7°F (1.5°C).Humidity
February and December, with an average relative humidity of 84%, are the most humid months.Rainfall
December is the month with the most rainfall. Rain falls for 18.7 days and accumulates 4.61" (117mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Raleigh Hills, during December, snow falls for 0.8 days and regularly aggregates up to 0.43" (11mm) of snow. In Raleigh Hills, during the entire year, snow falls for 6.1 days and aggregates up to 4.37" (111mm) of snow.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:31 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:50 am and sunset at 4:37 pm PST.
Sunshine
In December, the average sunshine is 4.1h.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 of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
Is December cold?
What is the most humid month?
What is the average humidity in December?
What is the wettest month?
How much 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 Raleigh Hills have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Raleigh Hills have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Raleigh Hills, OR
- Average high temperature in December: 44.2°F
The warmest month (with the highest average high temperature) is August (81.7°F).
The month with the lowest average high temperature is December (44.2°F).
- Average low temperature in December: 34.7°F
The month with the highest average low temperature is August (55.6°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).
Average pressure in December
Raleigh Hills, 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
Raleigh Hills, OR
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is January (5.4mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in December
Raleigh Hills, OR
- Average humidity in December: 84%
The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is August (63%).
Average rainfall in December
Raleigh Hills, OR
- Average rainfall in December: 4.61"
The wettest month (with the highest rainfall) is December (4.61").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in December
Raleigh Hills, OR
- Average rainfall days in December: 18.7 days
The month with the highest number of rainy days is March (20.6 days).
The month with the least rainy days is August (4.6 days).
Average snowfall in December
Raleigh Hills, OR
- Average snowfall in December: 0.43"
The month with the highest snowfall is February (1.61").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Raleigh Hills, OR
- Average snowfall days in December: 0.8 days
The month with the highest number of snowfall days is February (2.2 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
Raleigh Hills, 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 1min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in December
Raleigh Hills, OR
- Average sunshine days in December: 10.3 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is March (8.6 days).
Average UV index in December
Raleigh Hills, 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
Raleigh Hills, OR
- Average cloud cover in December: 58
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in December
Raleigh Hills, 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).
Raleigh Hills, Oregon, USA
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