December weather forecastTrail, OR
December
Weather in December
December, the first month of the winter in Trail, is still a chilly month, with an average temperature fluctuating between 44.2°F (6.8°C) and 30.4°F (-0.9°C).Temperature
Trail experiences its lowest average temperatures in December, reaching a peak of 44.2°F (6.8°C) and a minimum of 30.4°F (-0.9°C).Humidity
The months with the highest humidity are January and December, with an average relative humidity of 83%.Rainfall
December is the month with the most rainfall. Rain falls for 15 days and accumulates 3.46" (88mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Trail, during December, snow falls for 5.5 days and regularly aggregates up to 3.31" (84mm) of snow. In Trail, during the entire year, snow falls for 26.3 days and aggregates up to 21.18" (538mm) of snow.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 7:22 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:41 am and sunset at 4:47 pm PST.
Sunshine
With an average of 5.3h of sunshine, December has the least sunshine of the year.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 low health risk from exposure to the Sun's UV rays for the average person.Note: During December, 2 as the daily maximum UV index converts into the following advice:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Trail, OR
- Average high temperature in December: 44.2°F
The warmest month (with the highest average high temperature) is August (83.8°F).
The month with the lowest average high temperature is December (44.2°F).
- Average low temperature in December: 30.4°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (30.4°F).
Average pressure in December
Trail, OR
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in December
Trail, OR
- Average wind speed in December: 4.1mph
The windiest months (with the highest average wind speed) are January and March (4.3mph).
The calmest months (with the lowest average wind speed) are September and October (3.5mph).
Average humidity in December
Trail, OR
- Average humidity in December: 83%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is August (60%).
Average rainfall in December
Trail, OR
- Average rainfall in December: 3.46"
The wettest month (with the highest rainfall) is December (3.46").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
Trail, OR
- Average rainfall days in December: 15 days
The month with the highest number of rainy days is March (18 days).
The month with the least rainy days is August (3.1 days).
Average snowfall in December
Trail, OR
- Average snowfall in December: 3.31"
The month with the highest snowfall is February (6.54").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Trail, OR
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is February (6.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Trail, 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: 5h and 18min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Trail, OR
- Average sunshine days in December: 12.4 days
The months with the most sunshine days are July and August (25.9 days).
The month with the least sunshine days is March (10.7 days).
Average UV index in December
Trail, 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
Trail, OR
- Average cloud cover in December: 47
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in December
Trail, OR
- Average visibility in December: 5mi
The months with the highest visibility are July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, May, June, November and December (5mi).
