December weather forecastWinston, OR
December
Weather in December
December, the first month of the winter in Winston, is still a chilly month, with an average temperature varying between 46.2°F (7.9°C) and 32.9°F (0.5°C).Temperature
Winston's coldest weather arrives in December, when temperatures average a high of 46.2°F (7.9°C) and a low of 32.9°F (0.5°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 87%.Rainfall
December is the month with the most rainfall. Rain falls for 17 days and accumulates 3.74" (95mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Winston, during December, snow falls for 0.6 days and regularly aggregates up to 0.79" (20mm) of snow. Throughout the year, there are 4.7 snowfall days, and 3.03" (77mm) of snow is accumulated.Daylight
December has the shortest days of the year in Winston, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:26 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:48 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 4.2h of sunshine.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 2 during December, leads to the following recommendations:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Winston, OR
- Average high temperature in December: 46.2°F
The warmest month (with the highest average high temperature) is August (81°F).
The month with the lowest average high temperature is December (46.2°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is August (47.5°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure in December
Winston, 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
Winston, OR
- Average wind speed in December: 3.9mph
The windiest month (with the highest average wind speed) is January (4mph).
The calmest months (with the lowest average wind speed) are September and October (3.2mph).
Average humidity in December
Winston, OR
- Average humidity in December: 87%
The months with the highest relative humidity are February and December (87%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in December
Winston, OR
- Average rainfall in December: 3.74"
The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the least rainfall) is August (0.2").
Average rainfall days in December
Winston, OR
- Average rainfall days in December: 17 days
The month with the highest number of rainy days is March (19.4 days).
The month with the least rainy days is July (3.5 days).
Average snowfall in December
Winston, OR
- Average snowfall in December: 0.79"
The month with the highest snowfall is February (1.26").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Winston, OR
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is February (1.8 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
Winston, 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 12min
The months with the most sunshine are July and August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in December
Winston, OR
- Average sunshine days in December: 12.4 days
The month with the most sunshine days is August (26.2 days).
The month with the least sunshine days is March (9.7 days).
Average UV index in December
Winston, 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, March, November and December (UV index 2).
Average cloud cover in December
Winston, OR
- Average cloud cover in December: 58
The month with the most cloud cover is March (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Winston, OR
- Average visibility in December: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
