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, on average, is the coldest month, registering a high temperature of 44.4°F (6.9°C) and a low of 34.7°F (1.5°C).Humidity
In Lake Oswego, the average relative humidity in December is 83%.Rainfall
The month with the most rainfall is December, when the rain falls for 18.5 days and typically aggregates up to 4.57" (116mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Lake Oswego. In December, it is snowing for 0.8 days. Throughout December, 0.39" (10mm) of snow is accumulated. In Lake Oswego, during the entire year, snow falls for 6.5 days and aggregates up to 4.13" (105mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 7:30 am and sunset at 4:29 pm. On the last day of December, in Lake Oswego, Oregon, sunrise is at 7:50 am and sunset at 4:37 pm PST.
Sunshine
In December, the average sunshine in Lake Oswego, Oregon, is 4.4h.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 reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the UV index of 2 transforms into the following advice:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
What time of the year is the coldest in Lake Oswego?
Is December cold in Lake Oswego?
What is the average humidity in December in Lake Oswego?
What is the wettest month in Lake Oswego?
How many days does it rain in December in Lake Oswego?
How much does it snow in Lake Oswego in December?
What is the month with the shortest days in Lake Oswego?
How many hours of daylight does Lake Oswego have in December?
When are sunrise and sunset in December in Lake Oswego?
How long on average sun shines in December in Lake Oswego?
What is the month with the lowest UV index in Lake Oswego?
What is the UV index reading in December in Lake Oswego?
Average temperature in December
Lake Oswego, OR
- Average high temperature in December: 44.4°F
The warmest month (with the highest average high temperature) is August (81.7°F).
The month with the lowest average high temperature is December (44.4°F).
- Average low temperature in December: 34.7°F
The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).
Average pressure in December
Lake Oswego, OR
- Average pressure in December: 30.1"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
Lake Oswego, OR
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is January (6mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Lake Oswego, OR
- Average humidity in December: 83%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (63%).
Average rainfall in December
Lake Oswego, OR
- Average rainfall in December: 4.57"
The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in December
Lake Oswego, OR
- Average rainfall days in December: 18.5 days
The month with the highest number of rainy days is March (20.4 days).
The month with the least rainy days is July (4.8 days).
Average snowfall in December
Lake Oswego, OR
- Average snowfall in December: 0.39"
The month with the highest snowfall is March (1.46").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Lake Oswego, OR
- Average snowfall days in December: 0.8 days
The month with the highest number of snowfall days is February (2.3 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
Lake Oswego, 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: 4h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in December
Lake Oswego, OR
- Average sunshine days in December: 10.9 days
The month with the most sunshine days is July (23.9 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in December
Lake Oswego, 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
Lake Oswego, OR
- Average cloud cover in December: 55
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in December
Lake Oswego, 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).
Lake Oswego, Oregon, USA
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