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, with an average high of 45.9°F (7.7°C) and a low of 33.3°F (0.7°C), signifies the coldest month of the year.Humidity
January, February 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 12.8 days and accumulates 1.46" (37mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In December, it is snowing for 0.5 days. Throughout December, 0.47" (12mm) of snow is accumulated. In Roseburg, during the entire year, snow falls for 3.8 days and aggregates up to 1.77" (45mm) of snow.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:26 am and sunset at 4:39 pm. On the last day of December, sunrise is at 7:45 am and sunset at 4:48 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 4.3h of sunshine.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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
What is the average December temperature?
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 much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Roseburg have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Roseburg have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Roseburg, OR
- Average high temperature in December: 45.9°F
The warmest month (with the highest average high temperature) is August (80.8°F).
The month with the lowest average high temperature is December (45.9°F).
- Average low temperature in December: 33.3°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (33.3°F).
Average pressure in December
Roseburg, 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
Roseburg, OR
- Average wind speed in December: 3.7mph
The windiest months (with the highest average wind speed) are January and March (3.9mph).
The calmest months (with the lowest average wind speed) are September and October (3.2mph).
Average humidity in December
Roseburg, OR
- Average humidity in December: 87%
The months with the highest relative humidity are January, February and December (87%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in December
Roseburg, OR
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is December (1.46").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
Roseburg, OR
- Average rainfall days in December: 12.8 days
The month with the highest number of rainy days is March (13.5 days).
The month with the least rainy days is August (3.1 days).
Average snowfall in December
Roseburg, OR
- Average snowfall in December: 0.47"
The month with the highest snowfall is November (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Roseburg, OR
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is February (1.5 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
Roseburg, OR
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in December
Roseburg, OR
- Average sunshine days in December: 16.6 days
The month with the most sunshine days is August (25.1 days).
The month with the least sunshine days is February (14.6 days).
Average UV index in December
Roseburg, 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
Roseburg, OR
- Average cloud cover in December: 56
The month with the most cloud cover is March (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in December
Roseburg, OR
- Average visibility in December: 4mi
The months with the highest visibility are July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (4mi).
Roseburg, Oregon, USA
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