Lake Oswego Weather in December

Thinking of visiting Lake Oswego in December? Expect low temperatures reaching 8°C (46°F) during the day, dropping to 2°C (36°F) at night, and be prepared for the wettest month of the year.

Rainfall in Lake Oswego in December

The month is marked by heavy rainfall, often coming down in intense bursts. Make sure to have a poncho to stay dry. The climate data from previous years indicates about 21 days of rain, averaging 193 mm (7.6 in) for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Lake Oswego in December

Daytime temperatures in Lake Oswego reach 8°C (46°F) in December, dropping to 2°C (36°F) at night. December marks the winter season. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. Nights drop to 2°C (36°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet. It's generally the coldest month of the year, making it essential to pack warm layers and winter accessories.

Sunshine in Lake Oswego in December

The month has fewer sunny days, with around 64 hours of sunshine.

Wind Speed in Lake Oswego in December

Average wind speeds reach 3 m/s (6 knots) in December, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Lake Oswego. Our weather planner can help you explore destinations with more pleasant weather conditions.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Lake Oswego's climate page.

Lake Oswego Temperature in December

Min Temperature 2°C (36°F)  

Max Temperature 8°C (46°F)  

Chance of Rain 69%  

Precipitation 193 mm (7.6 in)  

Rainy days 21 days  

Humidity 83% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 64 hours *  

Percentage Sunshine *  

* Data from: Portland, the United States of America (20 KM, 12 Miles).

What to Wear in Lake Oswego in December

Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! With limited sunshine expected, sunglasses aren't a priority for packing.

What To Do in Lake Oswego in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

4/10

Cycling

4/10

Walking

4/10

Camping

3/10

Outdoor sports

4/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Lake Oswego's climate page.

More climate data for Lake Oswego

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Lake Oswego climate overview or explore weather in the United States of America.