December weather forecastSitkum, OR
December
Weather in December
The first month of the winter, December, is still a chilly month in Sitkum, Oregon, with an average temperature varying between 37.8°F (3.2°C) and 49.1°F (9.5°C).Temperature
December is the month when Sitkum sees the lowest average temperatures, with a high of 49.1°F (9.5°C) and a low of 37.8°F (3.2°C).Humidity
In Sitkum, the average relative humidity in December is 85%.Rainfall
December is the month with the most rainfall. Rain falls for 18 days and accumulates 5.12" (130mm) of precipitation.Snowfall
In Sitkum, snow does not fall in April through October and December.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:28 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:47 am and sunset at 4:50 pm PST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 4.6h of sunshine.UV index
The months with the lowest UV index are February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sitkum, OR
- Average high temperature in December: 49.1°F
The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is December (49.1°F).
- Average low temperature in December: 37.8°F
The month with the highest average low temperature is August (49.3°F).
The coldest month (with the lowest average low temperature) is February (37.4°F).
Average pressure in December
Sitkum, OR
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in December
Sitkum, OR
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is March (6.2mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Sitkum, OR
- Average humidity in December: 85%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are July, August and September (78%).
Average rainfall in December
Sitkum, OR
- Average rainfall in December: 5.12"
The wettest month (with the highest rainfall) is December (5.12").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
Sitkum, OR
- Average rainfall days in December: 18 days
The month with the highest number of rainy days is March (19.1 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in December
Sitkum, OR
- Average snowfall in December: 0"
The month with the highest snowfall is February (1.1").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").
Average snowfall days in December
Sitkum, OR
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and December (0 days).
Average daylight in December /
Average sunshine in December
Sitkum, OR
- Average daylight in December: 9h and 6min
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 6min).
- Average sunshine in December: 4h and 36min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 36min).
Average sunshine days in December
Sitkum, OR
- Average sunshine days in December: 12.5 days
The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is February (10.5 days).
Average UV index in December
Sitkum, OR
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in December
Sitkum, OR
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in December
Sitkum, OR
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, October, November and December (5mi).
The months with the lowest visibility are June, July, August and September (4mi).
