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
Summerville experiences its lowest temperatures in December, with an average peak of 33.8°F (1°C) and a low of 21°F (-6.1°C).Humidity
In December, the average relative humidity is 85%.Rainfall
In Summerville, in December, during 11.6 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. In Summerville, during the entire year, the rain falls for 137.5 days and collects up to 20.94" (532mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In December, it is snowing for 14.2 days. Throughout December, 10.94" (278mm) of snow is accumulated. Throughout the year, there are 68.6 snowfall days, and 52.4" (1331mm) of snow is accumulated.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year in Summerville, Oregon.On the first day of December, sunrise is at 7:12 am and sunset at 4:10 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:18 pm PST.
Sunshine
In December, the average sunshine is 5.1h.UV index
In Summerville, Oregon, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Frequently asked questions
What are the coldest months in Summerville?
How cold is December in Summerville?
What is the average humidity in December in Summerville?
How many days does it rain in December in Summerville?
How much does it snow in Summerville in December?
What is the month with the shortest days in Summerville?
What is the average length of the day in December in Summerville?
When are sunrise and sunset in December in Summerville?
How many hours of sunshine does Summerville have in December?
What is the UV index reading in December in Summerville?
Average temperature in December
Summerville, OR
- Average high temperature in December: 33.8°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (33.8°F).
- Average low temperature in December: 21°F
The month with the highest average low temperature is August (51.4°F).
The coldest month (with the lowest average low temperature) is December (21°F).
Average pressure in December
Summerville, OR
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in December
Summerville, OR
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in December
Summerville, OR
- Average humidity in December: 85%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (47%).
Average rainfall in December
Summerville, OR
- Average rainfall in December: 2.72"
The wettest month (with the highest rainfall) is January (2.99").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Summerville, OR
- Average rainfall days in December: 11.6 days
The month with the highest number of rainy days is March (17.8 days).
The month with the least rainy days is August (4.3 days).
Average snowfall in December
Summerville, OR
- Average snowfall in December: 10.94"
The month with the highest snowfall is February (13.62").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Summerville, OR
- Average snowfall days in December: 14.2 days
The months with the highest number of snowfall days are February and December (14.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Summerville, 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: 5h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Summerville, OR
- Average sunshine days in December: 12.1 days
The month with the most sunshine days is August (24.3 days).
The month with the least sunshine days is March (7.6 days).
Average UV index in December
Summerville, OR
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Summerville, OR
- Average cloud cover in December: 48
The month with the most cloud cover is February (Cloud cover 53).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in December
Summerville, OR
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is February (4mi).
Summerville, Oregon, USA
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